TechnicalOverview

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= DRAFT - to capture for Alpha 2 =

Any changes for Alpha 1 should go into https://wiki.ubuntu.com/PrecisePangolin/TechnicalOverview/Alpha1 at this stage.
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The Ubuntu developers are moving quickly to bring you the absolute latest and greatest software the Open Source community has to offer. The Oneiric Ocelot Alpha 1 Release of Ubuntu 11.10 is a '''developer snapshot''' to give you an early glance at the next version of Ubuntu.
  One of the requests received during the last Ubuntu Developer Summit was to provide a bit more information about the release process, and what's happening there. With this in mind, the release team will be adding a section about "what's happening in the background", to each of the milestones for those who are interested as part of this Technical Overview.

= Get
Ubuntu 11.10 =
== Upgrading from Ubuntu 11.04 ==

To upgrade from Ubuntu 11.04
on a desktop system, press Alt+F2 and type in "update-manager -d" (without the quotes) into the command box. Update Manager should open up and tell you: New distribution release '11.10' is available. Click Upgrade and follow the on-screen instructions.

To upgrade from Ubuntu 11.04
on a server system: install the {{{update-manager-core}}} package if it is not already installed; launch the upgrade tool with the command {{{sudo do-release-upgrade -d}}}; and follow the on-screen instructions. Note that the server upgrade is now more robust and will utilize GNU screen and automatically re-attach in case of e.g. dropped connection problems.

== Download the Alpha 1 ==

This release is for '''developers only'''. Most of these images are oversize; you can use either a DVD or USB for installation instead of a CD.

You can download Alpha 1 ISOs from:

 http://cdimage.ubuntu.com/releases/oneiric/alpha-1/ (Ubuntu Desktop and Server) <<BR>>
 http://uec-images.ubuntu.com/releases/oneiric/alpha-1/ (Ubuntu Cloud Server) <<BR>>
 http://cdimage.ubuntu.com/kubuntu/releases/oneiric/alpha-1/ (Kubuntu) <<BR>>
 http://cdimage.ubuntu.com/xubuntu/releases/oneiric/alpha-1/ (Xubuntu) <<BR>>
 http://cdimage.ubuntu.com/edubuntu/releases/oneiric/alpha-1/ (Edubuntu DVD) <<BR>>
## Mythbuntu and Ubuntu Studio not providing Alpha 1 images this time.
##
http://cdimage.ubuntu.com/ubuntustudio/releases/oneiric/alpha-1/ (Ubuntu Studio) <<BR>>
## http://cdimage.ubuntu.com/mythbuntu/releases/oneiric/alpha-1/ (Mythbuntu) <<BR>>
## image now under main one.
##
http://cdimage.ubuntu.com/ubuntu-netbook/releases/oneiric/alpha-1/ (Ubuntu Netbook ARM) <<BR>>

##In addition, the following lin
k will direct you to a download location near you:
##
## http://www.ubuntu.com/testing/download
(Ubuntu Desktop and Server) <<BR>>

= New features in Oneiric =

Please see the [[https://blueprints.launchpad.net/ubuntu/oneiric/+specs|Oneiric blueprint list]] for details.
The Ubuntu developers are moving quickly to bring you the absolute latest and greatest software the Open Source community has to offer. The Precise Pangolin Alpha 2 Release of Ubuntu 12.04 is a '''developer snapshot''' to give you a very early glance at the next version of Ubuntu.

= Get Ubuntu 12.04 =
== Upgrading
from Ubuntu 11.10 ==

To upgrade
from Ubuntu 11.10 on a desktop system, press Alt+F2 and type in "update-manager -d" (without the quotes) into the command box. Update Manager should open up and tell you: New distribution release '12.04' is available. Click Upgrade and follow the on-screen instructions.

To upgrade from Ubuntu 1
1.10 on a server system: install the {{{update-manager-core}}} package if it is not already installed; launch the upgrade tool with the command {{{sudo do-release-upgrade -d}}}; and follow the on-screen instructions. Note that the server upgrade is now more robust and will utilize GNU screen and automatically re-attach in case of e.g. dropped connection problems.

== Upgrading from Ubuntu 10.04 ==

10.04, in the current state, can't be upgraded to Precise (Bug:898551)

==
Download the Alpha 2 ==

This release is for '''developers only'''. The Ubuntu Desktop i386 image is oversized; you can use either a DVD or USB for installation instead of a CD.

You can download Alpha 2 ISOs from:

http://cdimage.ubuntu.com/releases/precise/alpha-2/ (Ubuntu Desktop and Server) <<BR>>
http://uec-images.ubuntu.com/releases/precise/alpha-2/ (Ubuntu Cloud Server) <<BR>>
http://cdimage.ubuntu.com/netboot/precise/ (Ubuntu Netboot) <<BR>>
http://cdimage.ubuntu.com/xubuntu/releases/precise/alpha-2/ (Xubuntu) <<BR>>
http://cdimage.ubuntu.com/lubuntu/releases/precise/alpha-2/ (Lubuntu) <<BR>>
http://cdimage.ubuntu.com/edubuntu/releases/precise/alpha-2/ (Edubuntu DVD) <<BR>>
http://cdimage.ubuntu.com/ubuntustudio/releases/precise/alpha-2/ (Ubuntu Studio) <<BR>>
http://cdimage.ubuntu.com/mythbuntu/releases/precise/alpha-2/ (Mythbuntu) <<BR>>
http://cdimage.ubuntu.com/kubuntu/releases/precise/alpha-2/ (Kubuntu) <<BR>>

= New features in Precise =

Please see the [[https://blueprints.launchpad.net/ubuntu/precise/+specs|Precise blueprint list]] for details.
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As with every new release, packages--applications and software of all kinds--are being updated at a rapid pace. Many of these packages came from an automatic sync from [[http://www.debian.org|Debian's]] Unstable branch, others have been explicitly pulled in for 11.10 Oneiric Ocelot.

For a list of all packages being accepted for 11.10 Oneiric Ocelot, please subscribe to oneiric-changes: https://lists.ubuntu.com/mailman/listinfo/oneiric-changes

Some of the key packages making their first appearance with this Alpha 1 release are:
 * [[http://kernel.org|Linux]] Kernel 2.6.39
 * [[http://gcc.gnu.org/|gcc]] 4.6 compiler
 * [[http://projects.gnome.org/NetworkManager/|network-manager]] 0.9
## * gnome-orca 3.0

=== Linux kernel 2.6.39 ===

Alpha 1 includes the 2.6.39 kernel which is based on the latest mainline release candidate kernel at kernel milestone freeze [[http://kernel.org|kernel]]. This is an update from the v2.6.38 in Natty.

=== Gcc 4.6 ===
The default compiler in Oneiric Alpha 1 has been bumped from gcc 4.5 to gcc 4.6.
 
=== network-manager 0.9 ===

The network-manager API has also broken compatibility, and if you use the DBus API directly here as well, will also be another pain point. It at least provides an introspectable Version property, so you can do the right thing for both versions.

== Ubuntu Desktop Edition ==

=== GNOME 3 has landed ===

[[More information on GNOME 3|http://www.gnome3.org]]

  * Components changes:
    * '''gnome-panel''' Since the 2d session on the CD in oneiric will be unity-2d we dropped some of "default ubuntu experience" patches from gnome-panel and got back closer from the upstream layout and experience. Note that currently indicators are not working because they need to be ported to GTK3 (see transitions below)
    * '''gnome-screensaver''' Upstream did a lot of cleaning in the screensaver code and the current version doesn't handle "hacks" (the graphics you could select to be rendered on the locked screen). We do plan to bring those back in some way this cycle, see: https://blueprints.launchpad.net/ubuntu/+spec/desktop-o-screensaver for details. The locked screen also has a gnome-shell look, we might want to look at getting it closed from the unity experience
    * '''gnome-keyring''' The Freedesktop Secret Service API has changed incompatibly, and the new gnome-keyring implements the new version of the API, without keeping backward compat for older incarnations of the API. If you're using the DBus API directly, this will be a pain point, especially if you need to maintain compat in the app, for older versions of Ubuntu. There also does not appear to be an introspectable way to get the API version here, which makes this that much more painful.

  * Transitions:
    * '''GTK2 to GTK3''' GNOME3 is using GTK3, we are working on migrating other softwares and wewould like to get GTK2 out of the CD for the lts next cycle. You can find documentation on how to work to GTK3 on: http://developer.gnome.org/gtk3/stable/gtk-migrating-2-to-3.html
    * '''gconf to gsettings (dconf)''' Gconf has been deprecated in favor of gsettings, we would like to get gconf out of the CD for the LTS as well, you can find porting documentation on: http://developer.gnome.org/gio/unstable/ch28.html
    * '''libpanel-applet, bonobo,gtk2 to dbus,gtk3''' The gnome-panel has been ported to use GTK3 now and dbus, the applets need to be ported to those technologies to work with the oneiric version. You can find instruction on how to port on: http://live.gnome.org/GnomeGoals/AppletsDbusMigration
    * '''libnotify''' The libnotify in oneiric has an abi,api break, basically upstream deprecated the possibility to position the notification next to widget or systray icons (notify_notification_(attach_to_widget|set_geometry_hints() got dropped), the Gtk``Widget argument from notify_notification_new() as well.
    * '''static bindings to gobject-introspection''' Static bindings (like pygtk) are deprecated in favor of gobject-introspection, see http://live.gnome.org/GObjectIntrospection for details.
    * '''dbus-glib to GDbus''' That one is less of a goal than other transitions listed before but if you do want to port code from dbus-glib to gdbus see http://developer.gnome.org/gio/unstable/ch29.html
As with every new release, packages--applications and software of all kinds--are being updated at a rapid pace. Many of these packages came from an automatic sync from [[http://www.debian.org|Debian's]] testing branch, others have been explicitly pulled in for 12.04 Precise Pangolin.

For a list of all packages being accepted for 12.04 Precise Pangolin, please subscribe to precise-changes: https://lists.ubuntu.com/mailman/listinfo/precise-changes

=== Linux kernel 3.2 ===

Alpha-2 includes the [[https://launchpad.net/ubuntu/+source/linux/3.2.0-12.21|3.2.0-12.21]] Ubuntu kernel which is based on the most recent v3.2.2 upstream stable kernel. This is an update from the [[https://launchpad.net/ubuntu/+source/linux/3.2.0-2.5|3.2.0-2.5]] which was shipped in Alpha-1 and based on upstream v3.2-rc3. As with Alpha-1, the Alpha-2 kernel no longer carries a separate amd64 -server and -generic kernel flavor. These have been merged to help reduce the maintenance burder over the life of this LTS release. AUFS also remains disabled in the Alpha-2 kernel. Anyone neeing AUFS is encouraged to migrate to overlayfs. We have pulled in the latest overlayfs updates to the Alpha-2 kernel. We intend to drop support of AUFS as it is an out of tree driver and increases the effort to support to maintain, especially over the life of an LTS. We have also [[https://lists.ubuntu.com/archives/kernel-team/2012-January/018696.html|dropped a set of seccomp_filter patches]] we were carrying as there were no consumers of these patches so it only made sense to drop them. We will re-evaluate their necessity in future Ubuntu releases. We do have some notable additions to mention as well for the Alpha-2 kernel. We've backported an improved set of [[https://lists.ubuntu.com/archives/kernel-team/2012-January/018514.html|jack detection patches]] from the upstream v3.3 kernel. A set of [[https://lists.ubuntu.com/archives/kernel-team/2012-January/018520.html|kexec fixes for arm from v3.3-rc1]] have also been backported. We've also conducted an [[https://wiki.ubuntu.com/KernelTeam/Specs/PreciseKernelConfigReviewPreciseRally|extensive review of Ubuntu kernel configs]] and made numerous config changes as a result.

=== Upstart 1.4 ===

Upstart 1.4 provides a number of minor fixes, improved documentation, a number of new features including:

 * New "`setuid`" and "`setgid`" stanzas to allow a job to be run as a specified user.
 * Default logging of job output:
   * All job output is logged to "`/var/log/upstart/<job>.log`" by default.
   * Log files are rotated daily by default using [[http://manpages.ubuntu.com/manpages/precise/man8/logrotate.8.html|logrotate(8)]]. See "`/etc/logrotate.d/upstart`".
   * Logging can be controlled via the `console` stanza and by new command-line options "`--default-console`", "`--logdir`" and "`--no-log`".
   * Improved "`upstart-udev-bridge`" to handle bad hardware that exposes garbage data to userspace.

For further details see
[[http://manpages.ubuntu.com/manpages/precise/man5/init.5.html|init(5)]],
[[http://manpages.ubuntu.com/manpages/precise/man8/init.8.html|init(8)]],
[[http://manpages.ubuntu.com/manpages/precise/man7/upstart-events.7.html|upstart-events(7)]] and
[[http://upstart.ubuntu.com/cookbook/|The Upstart Cookbook]].

== General ==

Until Ubuntu 11.10, the Unix group for administrators with `root` privileges through sudo had been `admin`. Starting with Ubuntu 12.04 LTS, it is now `sudo`, for compatibility with Debian and sudo itself. However, for backwards compatibility, `admin` group members are still recognized as administrators.

Automatic Apport crash reporting has been enabled by default again to catch problems early on. It now [[http://www.piware.de/2011/11/apport-1-90-client-side-duplicate-checking/|checks for duplicates on the client side]], which will avoid uploading debug data and creating Launchpad bug reports unnecessarily in many cases now.

== Ubuntu ==

The default music player has been [[UbuntuSpec:desktop-p-default-apps|switched to Rhythmbox]]. There is no Ubuntu``One Music Store yet, this still needs to be ported to GTK 3.
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Due to kernel misconfiguration, omap3 images are non-functional for Alpha 1 ([[https://bugs.launchpad.net/ubuntu/+source/linux/+bug/791552|791552]]). They will return as normal for Alpha 2.

=== Ubuntu Netbook ===

unity-2d has been updated to 3.8.6

Upcoming work: With unity-2d being shipped as part of the desktop image this cycle, it is expected that the ubuntu-netbook image for ARM will be retired in favor of an ubuntu-desktop image with unity-2d as the default environment.

=== Ubuntu Headless ===

There are no significant changes.

##== Software Center ==
##
##.
In the Ubuntu ARM world the automatic building of hardfloat packages for the newly indroduced armhf architecture has started which should gain a good performance increase for floating point operations. At feature freeze time it will be decided if the builds progressed enough to switch to this architecture by default for the 12.04 release. If you are a developer and encounter problems with your package builds on armhf, please contact the ubuntu-arm team in the #ubuntu-arm channel on freenode or drop a mail to the ubuntu-devel mailing list.
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Most significant change is that the delta with Debian reduced in many areas.

[[http://www.openstack.org/|Openstack]] components mostly at 'diablo-1' development snapshot.

Orchestra elements have been been refreshed.
There are many general package updates. Some that are noteworthy are:
 * squid package now installs squid3 rather than squid 2.7.
 * cobbler is now based on upstream 2.2.2 release.
 * Openstack components (nova, glance, swift, keystone, opestack-dashboard) are based off Essex 2 release.
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There are no significant changes.

== Kubuntu ==

Kubuntu now uses the Muon Software Center and related packages for package management
There are no significant changes in Alpha 1, only general package updates.

## == Kubuntu ==
## TO DO: ???

== Xubuntu ==

Ristretto 0.3.0 uploaded in Precise, should fix all open bugs and issues reported

== Edubuntu ==

Edubuntu Precise alpha-1 is pretty similar to Ubuntu 11.10. Edubuntu kept in sync with Ubuntu, so gbrainy, tomboy are now gone and rhythmbox replaces banshee.

== Lubuntu ==

Lubuntu switched to Lightdm for the standard display manager.

## == Ubuntu Studio ==
## Not releasing in Alpha 1

## == Mythbuntu ==
## Not releasing in Alpha 1


= Known issues =

As is to be expected, at this '''very early''' stage of the release process, there are some significant known bugs that developers may run into with the Precise Alpha 1 Release. The ones we know about at this point (and some of the workarounds), are documented here so you don't need to spend time reporting these bugs again:
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The core Plasma workspace and related applications have been updated to the latest maintenance release (KDE SC 4.6.3/KDE PIM 4.4.11). The beta of the next major release (4.7 beta 1) is not in Oneiric yet. Users interested in this release should try out [[http://quintasan.blogspot.com/2011/03/project-neon-is-back.html|Project Neon]].

Kubuntu installer status:
   * The alternate installer has been tested and works on both i386 and amd64.
   * The live session in the normal Kubuntu image works and is useful if you want to try out Kubuntu Oneiric without changing your computer. Installations with this image will fail. In order to install Kubuntu Oneiric Alpha 1 the alternate image must be used.
   * No armel or powerpc images are provided as they are known not to be working.

== Xubuntu ==

There are no significant changes to Xubuntu for Alpha1.

== Edubuntu ==

Edubuntu 11.10 Alpha-1 ships gobby-infinote instead of the older gobby client.

When installing LTSP from the installer, LTSP users now get the same session as the server's.

The custom Edubuntu installer steps are now translatable (though only English is present for this alpha).

To learn more on Edubuntu and download a stable version of it, go to: http://www.edubuntu.org

## == Ubuntu Studio ==
## No image planned and tested for Oneiric Alpha 1

## == Mythbuntu ==
## No image planned and tested for Oneiric Alpha 1

= What's happening in the background =

The time around Alpha 1 is when most of the system wide changes happen for the release. Toolchain versions are one obvious case, but there are also other transitions that are happening. To give provide a bit of perspective on this, Iain Lane, one of our new release team members, has provided the following overview of what we mean when we refer to '''Transitions'''.
 
The Ubuntu archive contains many different libraries and applications, most of which see updates from time-to-time. Sometimes these updates are incompatible with the previous version, and in these cases software which uses this old version must be updated to work with the new. Ubuntu developers usually refer to this process as transitioning.
 
Typically transitions require touching several different packages. Changes may range from simple no-change rebuilds to porting to new API versions.
 
The Ubuntu release team is now running a tracker at
 
  http://people.canonical.com/~ubuntu-archive/transitions/
   
which is being used to keep track of ongoing transitions that are taking place in the archive.
The tracker has already been used in the Oneiric cycle to monitor Perl, OCaml and OpenSSL transitions. Currently we are tracking, amongst others, transitions involving Libav, Hal and GHC.

If you wish to have a transition monitored by the tracker (they can be added in advance), please propose a merge against this branch:

  https://code.launchpad.net/~ubuntu-transition-trackers/+junk/transition-tracker
  
following the brief documentation at

  http://people.canonical.com/~ubuntu-archive/transitions/readme.txt

Help with completing existing transitions is welcome; please visit #ubuntu-devel on irc.freenode.net to get involved.

= Known issues =

As is to be expected, at this '''very early''' stage of the release process, there are some significant known bugs that users may run into with the Oneiric Alpha 1 Release. The ones we know about at this point (and some of the workarounds), are documented here so you don't need to spend time reporting these bugs again:
  
== Boot, installation and post-install ==

 * Sometimes the installer crashes in the middle of copying files to the target system. This mostly seems to happen with installation in virtual machines such as KVM, VMWare, or VirtualBox, but it has been observed on real hardware as well. The workaround is to just re-attempt the installation. (Bug:894768)
 * On the pre-installed ARM images, sometimes the installer packages are not removed after first-boot setup, which will cause the first-boot setup to be re-run after next boot. The workaround is to manually remove the packages `ubiquity oem-config oem-config-gtk jasper`. (Bug:871785)
 * There is no network support on some Beagle board versions. (Bug:838200)
 * Boot failure on Geode LX. A patch has been proposed upstream and a test kernel is available in the bug report. (Bug:892615)
 * Repeated DMAR fault messages on Dell Latitude E6410 with Ricoh FireWire Host Controller. Current workaround is to boot with "intel_iommu=off". (Bug:894070)
 * Failure to discover Apple MacIO ATA devices when testing Ubuntu powerpc images results in unbootable/uninstallable images. ([[https://lists.ubuntu.com/archives/kernel-team/2011-November/017998.html|Fix is queued]]).
 * Users of VMWare Workstation 8 or VMWare Player may experience boot problems. (Bug:858122)

== Upgrades ==

 * The `ia32-libs` package that used to provide 32-bit libraries on 64-bit (`amd64`) installations has been removed in favour of multiarch. Systems using `ia32-libs` must migrate to multiarch in order to upgrade to 12.04. In most cases, this should be set up automatically by the upgrade process. Some users who upgraded through previous development releases may have removed `/etc/dpkg/dpkg.cfg.d/multiarch`, and must restore it with the contents `foreign-architecture i386` in order to have 32-bit library support in 12.04.
 * The package manager in Ubuntu 11.10 is unable to upgrade 64-bit systems with the `ia32-libs` package installed. A workaround is to install the `apt` and `libapt-pkg4.12` packages from precise before starting the upgrade. (Bug:924079)
 * Landscape is currently incompatible with multiarch. We hope that this will be fixed in time for 12.04; but if you are using Landscape then you will need to either remain with 11.10 or remove any 32-bit libraries.

##== Migration ==
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 * In GTK3:
   * there is no GTK3 theme yet (you can install gnome-theme-standard from universe to get the upstream theme)
   * there is no indicator-appmenu or scrollbar integration yet for GTK3

 * On unity-2d, clicking on the bfb or a launcher crashes unity with the following error:
   * unity-2d-places crashed with SIGSEGV in QTJSC::Structure::materializePropertyMap() ([[https://launchpad.net/bugs/791127|791127]])
   * unity-2d-places crashed with SIGSEGV in QMetaObject::metacall() ([[https://launchpad.net/bugs/791213|791213]])

 * On Unity:
   * the windows buttons are missing from the title bar ([[https://launchpad.net/bugs/791081|791081]])
   * With Nautilus default plain blue background or another plain color the background fails to redraw ([[https://launchpad.net/bugs/784209|784209]])
   * Nautilus doesn't display the background by default (you can change it in dconf-editor org.gnome.desktop.background show-desktop icons)

 * to test LightDM, you can install the sample greeter: sudo apt-get install lightdm-greeter-example-gtk and select LightDM when prompted. It is currently un-themed
 
 * The session live persistent with USB don't start with some graphics card, error in the prompt initramfs [WARNING: at /build/buildd/linux-2.6.38/drivers/gpu/drm/radeon/radeon_gart.c] ([[https://launchpad.net/bugs/557261|557261]])

 * With some ATI graphics card, error de Video - [DRM: radeon_ttm_backend_bind] * * ERROR no pudo enlazar 1.772 páginas ([[https://launchpad.net/bugs/557261|656486]])

 * the user background image is not migrated on upgrade
<<BR>> Since Unity is in active development right now, please check the [[https://bugs.launchpad.net/ubuntu/+source/unity/|unity bug reports]] before filing new bugs.
 * On Intel N10 Graphics, plugging in external monitor to VGA port makes both displays corrupted with thick slanted lines. (Bug:830949)
 * Remote Desktop does not work with the -fglrx video driver, nor with the legacy nvidia drivers. You can establish a connection but the remote screen does not update. As a workaround use Unity2d, or switch to the free drivers or nvidia-current. (Bug:772873)
 * The Onboard window in Unity2d when maximized puts the window on top of everything and has no window controls when maximised as it refuses focus, and you can't double click the title bar to restore it. Once maximised your only real option is to switch to another workspace using a hard keyboard ctrl+alt+arrow keys then run gconf-editor and in the apps\onboard section change the height, or reboot into Unity3d and double click or drag down the top panel. (Bug:859288).
 * Maximized windows can be accidentally closed from wrong monitor.(Bug:865701)
 * For languages that are read right to left (arabic, hebrew), there is some inconsistency in display between the login screen (lightDM) and the desktop environment (unity). (Bug:871764)
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 * On login gnome-user-share crashes with the error: "gnome-user-share crashed with SIGABRT in g_option_context_parse()" ([[https://launchpad.net/bugs/788714|788714]])

## == Common Desktop applications ==
##
##
##
 
== Boot, installation and post-install ==

 * booting under KVM is not working for Unity 2D on some systems.

 * Unity-2D is not working on KVM with xen and cirrus video devices ([[https://launchpad.net/bugs/759803|759803]])

 * OEM Install: No launcher or desktop shortcut to prepare for shipping ([[https://launchpad.net/bugs/791159|791159]])

 * sound muted on live cd and first boot of fresh installation with many sound cards ([[https://launchpad.net/bugs/770349|770349]])

##== Migration ==
##
##
##
 * The background image of the login greeter still says "Ubuntu 11.10". (Bug:892394)
 * Sometimes on Unity-2D gedit fails to start, this can be worked around by retrying to start it. (Bug:873027)
 * Sometimes when locking the screen, a "num lock is on" warning may appear even though num lock isn't actually on. (Bug:841541)
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 * omap3 images are non-functional for Alpha 1 due to misconfiguration, this should be fixed shortly after Alpha 1. ([[https://bugs.launchpad.net/ubuntu/+source/linux/+bug/791552|791552]])

##== Software Center ==
##.
##
## == Ubuntu server edition ==
 * See [[https://wiki.ubuntu.com/PrecisePangolin/TechnicalOverview#Boot.2C_installation_and_post-install|boot related issues]] noted above.
 * If your system hangs and errors at /build/buildd/linux-3.2.0/arch/x86/kernel/apic/ipi.c:113 default_send_IPI_mask_logical+0xdc/0xf0(), this can be worked around by running the following command to disable CPU control in powernap:{{{ chmod -x /etc/pm/power.d/01cpu_online}}} (Bug:898127)
 * Sandy Bridge power regression still present (30% more power at idle) (Bug:818830) -- Platforms affected by this power consumption regression are sixth generation i915 GPUs having the following PCI identifiers: 8086:0102, 8086:0112, 8086:0122, 8086:0106, 8086:0116, 8086:0126, 8086:010A.


## == Ubuntu Server ==
## No server specific known issues to report.
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 * Eucalyptus fails to start up ([[https://launchpad.net/bugs/791607|791607]])

 * Oneiric cluster compute instances do not boot ([[https://launchpad.net/bugs/791850|791850]])

 * udevd dies, loses events, network doesn't come up ([[https://launchpad.net/bugs/791868|791868]])

 * /mnt not mounted, swap not used, disk is xvde ([[https://launchpad.net/bugs/784937|784937]])

== Kubuntu ==

 * The network management widget doesn't work as it is not yet compatible with Network``Manager 0.9. DHCP ethernet connections still work however.

 * Some packages from the KDE Software Compilation (none included in the default install) are not installable due to library transitions in progress. This will be corrected shortly after Alpha 1 release.
 * Images time out too quickly on heavily loaded Openstack (Bug:894279)
 * Images contain linux-image-extra package to support popular virtual ethernet devices, resulting in larger than normal downloads (Bug:897795)

== Ubuntu Core ==
 * DRM libraries are always installed, even for users who are not enabling graphical environments (Bug:819802)

## == Kubuntu ==
## not sufficient testing for release
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 * LTSP Live won't work because of some changes in Network Manager. A rewrite of it is in progress which will address the issue. Installing LTSP will work fine though. ([[https://launchpad.net/bugs/791611|791611]])

 * Edubuntu currently ships with the "fallback" gnome3 session by default until we decide what we want our default session to be. As this session is still quite new, some major bugs are present like the Applications menu being empty. We did this choice to make sure everyone would be able to start this Live DVD, but we recommend the user to choose Unity at installation time if not installing in a virtual machine.

 * Starting the installation from the live environment can be done by:
   * Clicking on the "Places" menu
   * Choosing Desktop
   * Double-Clicking on the Installer icon in the file browser
   * Then in the installer, choose Unity if your hardware can run either unity-3d or unity-2d.

## == Xubuntu ==
## .
##
##== Mythbuntu ==
##.

'''For a listing of more known issues, please refer to the Oneiric Ocelot [[https://bugs.launchpad.net/ubuntu/oneiric/+bugs|bug tracker]] in Launchpad.'''
 * As Edubuntu includes a standard Ubuntu desktop, most of the issues above also apply to Edubuntu.

 * Advanced package selection doesn't appear in some languages. As a workaround, simply remove the packages you don't want once your system is installed. (Bug:872727)

== Xubuntu ==

 * When using the new plymouth splash screen, occasionally using the desktop cd to install, the message "hit any key to continue" does not appear. Should you get a black screen with text and the sliding throbber, when the throbber stops moving and the cd ejects, remove the cd and hit enter on the keyboard to continue.(Bug:872472)

== Lubuntu ==

 * Ubiquity requires more than 4 Gb of free space to install, please use alternate ISO if you are in this case (Bug:775124)
 * Keyboard layout can't be saved using LXKeymap. Please run "sudo dpkg-reconfigure keyboard-configuration" (Bug:729880)
 * In persistent mode, items created on the desktop are not displayed until next reboot. (Bug:837470)
 * Lubuntu xfce4-power-manager displays a "broken" icon in lxpanel. (Bug:871553)

## == Ubuntu Studio ==

## == Mythbuntu ==


'''For a listing of more known issues, please refer to the Precise Pangolin [[https://bugs.launchpad.net/ubuntu/precise/+bugs|bug tracker]] in Launchpad.'''
Line 272: Line 201:
It should come as no surprise that this Alpha 1 release of Oneiric Ocelot contains other bugs. Your comments, bug reports, patches and suggestions will help fix bugs and improve the quality of future releases. Please [[http://help.ubuntu.com/community/ReportingBugs|report bugs using the tools provided]]. It should come as no surprise that this Alpha 1 release of Precise Pangolin contains other bugs. Your comments, bug reports, patches and suggestions will help fix bugs and improve the quality of future releases. Please [[http://help.ubuntu.com/community/ReportingBugs|report bugs using the tools provided]].

DRAFT - to capture for Alpha 2

Any changes for Alpha 1 should go into https://wiki.ubuntu.com/PrecisePangolin/TechnicalOverview/Alpha1 at this stage.

Introduction

The Ubuntu developers are moving quickly to bring you the absolute latest and greatest software the Open Source community has to offer. The Precise Pangolin Alpha 2 Release of Ubuntu 12.04 is a developer snapshot to give you a very early glance at the next version of Ubuntu.

Get Ubuntu 12.04

Upgrading from Ubuntu 11.10

To upgrade from Ubuntu 11.10 on a desktop system, press Alt+F2 and type in "update-manager -d" (without the quotes) into the command box. Update Manager should open up and tell you: New distribution release '12.04' is available. Click Upgrade and follow the on-screen instructions.

To upgrade from Ubuntu 11.10 on a server system: install the update-manager-core package if it is not already installed; launch the upgrade tool with the command sudo do-release-upgrade -d; and follow the on-screen instructions. Note that the server upgrade is now more robust and will utilize GNU screen and automatically re-attach in case of e.g. dropped connection problems.

Upgrading from Ubuntu 10.04

10.04, in the current state, can't be upgraded to Precise (898551)

Download the Alpha 2

This release is for developers only. The Ubuntu Desktop i386 image is oversized; you can use either a DVD or USB for installation instead of a CD.

You can download Alpha 2 ISOs from:

http://cdimage.ubuntu.com/releases/precise/alpha-2/ (Ubuntu Desktop and Server)
http://uec-images.ubuntu.com/releases/precise/alpha-2/ (Ubuntu Cloud Server)
http://cdimage.ubuntu.com/netboot/precise/ (Ubuntu Netboot)
http://cdimage.ubuntu.com/xubuntu/releases/precise/alpha-2/ (Xubuntu)
http://cdimage.ubuntu.com/lubuntu/releases/precise/alpha-2/ (Lubuntu)
http://cdimage.ubuntu.com/edubuntu/releases/precise/alpha-2/ (Edubuntu DVD)
http://cdimage.ubuntu.com/ubuntustudio/releases/precise/alpha-2/ (Ubuntu Studio)
http://cdimage.ubuntu.com/mythbuntu/releases/precise/alpha-2/ (Mythbuntu)
http://cdimage.ubuntu.com/kubuntu/releases/precise/alpha-2/ (Kubuntu)

New features in Precise

Please see the Precise blueprint list for details.

Please test and report any bugs you find:

Updated Packages

As with every new release, packages--applications and software of all kinds--are being updated at a rapid pace. Many of these packages came from an automatic sync from Debian's testing branch, others have been explicitly pulled in for 12.04 Precise Pangolin.

For a list of all packages being accepted for 12.04 Precise Pangolin, please subscribe to precise-changes: https://lists.ubuntu.com/mailman/listinfo/precise-changes

Linux kernel 3.2

Alpha-2 includes the 3.2.0-12.21 Ubuntu kernel which is based on the most recent v3.2.2 upstream stable kernel. This is an update from the 3.2.0-2.5 which was shipped in Alpha-1 and based on upstream v3.2-rc3. As with Alpha-1, the Alpha-2 kernel no longer carries a separate amd64 -server and -generic kernel flavor. These have been merged to help reduce the maintenance burder over the life of this LTS release. AUFS also remains disabled in the Alpha-2 kernel. Anyone neeing AUFS is encouraged to migrate to overlayfs. We have pulled in the latest overlayfs updates to the Alpha-2 kernel. We intend to drop support of AUFS as it is an out of tree driver and increases the effort to support to maintain, especially over the life of an LTS. We have also dropped a set of seccomp_filter patches we were carrying as there were no consumers of these patches so it only made sense to drop them. We will re-evaluate their necessity in future Ubuntu releases. We do have some notable additions to mention as well for the Alpha-2 kernel. We've backported an improved set of jack detection patches from the upstream v3.3 kernel. A set of kexec fixes for arm from v3.3-rc1 have also been backported. We've also conducted an extensive review of Ubuntu kernel configs and made numerous config changes as a result.

Upstart 1.4

Upstart 1.4 provides a number of minor fixes, improved documentation, a number of new features including:

  • New "setuid" and "setgid" stanzas to allow a job to be run as a specified user.

  • Default logging of job output:
    • All job output is logged to "/var/log/upstart/<job>.log" by default.

    • Log files are rotated daily by default using logrotate(8). See "/etc/logrotate.d/upstart".

    • Logging can be controlled via the console stanza and by new command-line options "--default-console", "--logdir" and "--no-log".

    • Improved "upstart-udev-bridge" to handle bad hardware that exposes garbage data to userspace.

For further details see init(5), init(8), upstart-events(7) and The Upstart Cookbook.

General

Until Ubuntu 11.10, the Unix group for administrators with root privileges through sudo had been admin. Starting with Ubuntu 12.04 LTS, it is now sudo, for compatibility with Debian and sudo itself. However, for backwards compatibility, admin group members are still recognized as administrators.

Automatic Apport crash reporting has been enabled by default again to catch problems early on. It now checks for duplicates on the client side, which will avoid uploading debug data and creating Launchpad bug reports unnecessarily in many cases now.

Ubuntu

The default music player has been switched to Rhythmbox. There is no UbuntuOne Music Store yet, this still needs to be ported to GTK 3.

Ubuntu ARM

In the Ubuntu ARM world the automatic building of hardfloat packages for the newly indroduced armhf architecture has started which should gain a good performance increase for floating point operations. At feature freeze time it will be decided if the builds progressed enough to switch to this architecture by default for the 12.04 release. If you are a developer and encounter problems with your package builds on armhf, please contact the ubuntu-arm team in the #ubuntu-arm channel on freenode or drop a mail to the ubuntu-devel mailing list.

Ubuntu Server

There are many general package updates. Some that are noteworthy are:

  • squid package now installs squid3 rather than squid 2.7.
  • cobbler is now based on upstream 2.2.2 release.
  • Openstack components (nova, glance, swift, keystone, opestack-dashboard) are based off Essex 2 release.

Ubuntu Server Cloud images

There are no significant changes in Alpha 1, only general package updates.

Xubuntu

Ristretto 0.3.0 uploaded in Precise, should fix all open bugs and issues reported

Edubuntu

Edubuntu Precise alpha-1 is pretty similar to Ubuntu 11.10. Edubuntu kept in sync with Ubuntu, so gbrainy, tomboy are now gone and rhythmbox replaces banshee.

Lubuntu

Lubuntu switched to Lightdm for the standard display manager.

Known issues

As is to be expected, at this very early stage of the release process, there are some significant known bugs that developers may run into with the Precise Alpha 1 Release. The ones we know about at this point (and some of the workarounds), are documented here so you don't need to spend time reporting these bugs again:

Boot, installation and post-install

  • Sometimes the installer crashes in the middle of copying files to the target system. This mostly seems to happen with installation in virtual machines such as KVM, VMWare, or VirtualBox, but it has been observed on real hardware as well. The workaround is to just re-attempt the installation. (894768)

  • On the pre-installed ARM images, sometimes the installer packages are not removed after first-boot setup, which will cause the first-boot setup to be re-run after next boot. The workaround is to manually remove the packages ubiquity oem-config oem-config-gtk jasper. (871785)

  • There is no network support on some Beagle board versions. (838200)

  • Boot failure on Geode LX. A patch has been proposed upstream and a test kernel is available in the bug report. (892615)

  • Repeated DMAR fault messages on Dell Latitude E6410 with Ricoh FireWire Host Controller. Current workaround is to boot with "intel_iommu=off". (894070)

  • Failure to discover Apple MacIO ATA devices when testing Ubuntu powerpc images results in unbootable/uninstallable images. (Fix is queued).

  • Users of VMWare Workstation 8 or VMWare Player may experience boot problems. (858122)

Upgrades

  • The ia32-libs package that used to provide 32-bit libraries on 64-bit (amd64) installations has been removed in favour of multiarch. Systems using ia32-libs must migrate to multiarch in order to upgrade to 12.04. In most cases, this should be set up automatically by the upgrade process. Some users who upgraded through previous development releases may have removed /etc/dpkg/dpkg.cfg.d/multiarch, and must restore it with the contents foreign-architecture i386 in order to have 32-bit library support in 12.04.

  • The package manager in Ubuntu 11.10 is unable to upgrade 64-bit systems with the ia32-libs package installed. A workaround is to install the apt and libapt-pkg4.12 packages from precise before starting the upgrade. (924079)

  • Landscape is currently incompatible with multiarch. We hope that this will be fixed in time for 12.04; but if you are using Landscape then you will need to either remain with 11.10 or remove any 32-bit libraries.

Graphics and Display

  • On Intel N10 Graphics, plugging in external monitor to VGA port makes both displays corrupted with thick slanted lines. (830949)

  • Remote Desktop does not work with the -fglrx video driver, nor with the legacy nvidia drivers. You can establish a connection but the remote screen does not update. As a workaround use Unity2d, or switch to the free drivers or nvidia-current. (772873)

  • The Onboard window in Unity2d when maximized puts the window on top of everything and has no window controls when maximised as it refuses focus, and you can't double click the title bar to restore it. Once maximised your only real option is to switch to another workspace using a hard keyboard ctrl+alt+arrow keys then run gconf-editor and in the apps\onboard section change the height, or reboot into Unity3d and double click or drag down the top panel. (859288).

  • Maximized windows can be accidentally closed from wrong monitor.(865701)

  • For languages that are read right to left (arabic, hebrew), there is some inconsistency in display between the login screen (lightDM) and the desktop environment (unity). (871764)

Desktop

  • The background image of the login greeter still says "Ubuntu 11.10". (892394)

  • Sometimes on Unity-2D gedit fails to start, this can be worked around by retrying to start it. (873027)

  • Sometimes when locking the screen, a "num lock is on" warning may appear even though num lock isn't actually on. (841541)

Kernel

  • See boot related issues noted above.

  • If your system hangs and errors at /build/buildd/linux-3.2.0/arch/x86/kernel/apic/ipi.c:113 default_send_IPI_mask_logical+0xdc/0xf0(), this can be worked around by running the following command to disable CPU control in powernap: chmod -x /etc/pm/power.d/01cpu_online (898127)

  • Sandy Bridge power regression still present (30% more power at idle) (818830) -- Platforms affected by this power consumption regression are sixth generation i915 GPUs having the following PCI identifiers: 8086:0102, 8086:0112, 8086:0122, 8086:0106, 8086:0116, 8086:0126, 8086:010A.

Ubuntu Cloud

  • Images time out too quickly on heavily loaded Openstack (894279)

  • Images contain linux-image-extra package to support popular virtual ethernet devices, resulting in larger than normal downloads (897795)

Ubuntu Core

  • DRM libraries are always installed, even for users who are not enabling graphical environments (819802)

Edubuntu

  • As Edubuntu includes a standard Ubuntu desktop, most of the issues above also apply to Edubuntu.
  • Advanced package selection doesn't appear in some languages. As a workaround, simply remove the packages you don't want once your system is installed. (872727)

Xubuntu

  • When using the new plymouth splash screen, occasionally using the desktop cd to install, the message "hit any key to continue" does not appear. Should you get a black screen with text and the sliding throbber, when the throbber stops moving and the cd ejects, remove the cd and hit enter on the keyboard to continue.(872472)

Lubuntu

  • Ubiquity requires more than 4 Gb of free space to install, please use alternate ISO if you are in this case (775124)

  • Keyboard layout can't be saved using LXKeymap. Please run "sudo dpkg-reconfigure keyboard-configuration" (729880)

  • In persistent mode, items created on the desktop are not displayed until next reboot. (837470)

  • Lubuntu xfce4-power-manager displays a "broken" icon in lxpanel. (871553)

For a listing of more known issues, please refer to the Precise Pangolin bug tracker in Launchpad.

Reporting bugs

It should come as no surprise that this Alpha 1 release of Precise Pangolin contains other bugs. Your comments, bug reports, patches and suggestions will help fix bugs and improve the quality of future releases. Please report bugs using the tools provided.

If you want to help out with bugs, the Bug Squad is always looking for help.

Participate in Ubuntu

If you would like to help shape Ubuntu, take a look at the list of ways you can participate at

More information

You can find out more about Ubuntu on the Ubuntu website and Ubuntu wiki.

To sign up for future Ubuntu development announcements, please subscribe to Ubuntu's development announcement list at:

PrecisePangolin/TechnicalOverview (last edited 2012-03-29 18:21:29 by kate.stewart)