TechnicalOverview
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Table of Contents |
DRAFT - to capture for Alpha 2
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
Upgrading from 10.04 to 12.04 still has some known issues and is not recommended at this time. (Bug:
Download the Alpha 2
This release is for developers only. The Ubuntu Desktop images are 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:
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.
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 have also dropped a set of seccomp_filter patches we were carrying as there were no consumers of these patches at this time. 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.
Toolchain
TO DO: Matthias or Barry - please review and update
- GCC updated to 4.6.2-12ubuntu1 - merge in Debian updates, and Linaro support from the 4.6-2012.01-1 release, and fix control file generation for ARM multiarch cross compliles.
- incorporate upstream updates into Python 2.7 and Python 3.2.
- Python 3 newly ported packages include: germinate, lazr.ui, wadllist, python-defer, python-keyring, python-qt4
Ubuntu
Desktop
- 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.
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.
LibreOffice has been updated to 3.5 beta 2. Please report any regressions that you notice.
- When installing new software through software-center, corresponding language support packages (translations, spell check modules particular to that software, help files, etc.) are now installed along automatically. This removes the need to open "Language Support" after installing new software.
- From Desktop weekly status: (delete before milestone release)
- 2012/01/13:
https://wiki.ubuntu.com/DesktopTeam/ReleaseStatus#relnotes has the complete cumulative release notes for precise. Changes since last week:
LibreOffice has been updated to 3.5 beta 2. Please report any regressions that you notice.
- 2012/01/20: No delta since last week.
- 2012/01/27:
- When installing new software through software-center, corresponding language support packages (translations, spell check modules particulat to that software, help files, etc.) are now installed along automatically. This removes the need to open "Language Support" after installing new software.
- 2012/01/13:
Guesses of what should also be in ... Martin Pitt please review and update
- Several key packages have been updated in Alpha 2, highlights are:
- X.org 1.11
- Qt 4.8
- DNS resolution will now be done through dnsmasq, which should help split-DNS VPNs and faster DNS resolution.
- Nautilus quicklist support has been added to Unity launcher.
- libgnome-keyring and libxklavier introspection.
- pm-utils bug fixes and further power consumption tweaks.
- update selected GNOME components to 3.3.2
- webkit?
- unity configurations settings are now exposed through control-center
Unity 5.0
- From systems weekly status: (delete before milestone release)
- 2012/01/13: -
- 2012/01/20: * HUD - due on Monday
- 2012/01/27: * HUD - still pending, will update with official HUD release
- From DX weekly status: (delete before milestone release)
- 2012/01/13: -
- 2012/01/20: -
- 2012/01/27: -
Guesses of what should be in ... Oliver Reis/David Barth please review and update
- quicklist items can now be selected with one right click
- many compiz crashes have been fixed.
- improvements with behaviour of maximized windows.
- theming fixes in LightDM
Ubuntu One
- From Ubuntu One weekly status: (delete before milestone release)
- 2012/01/13: -
- 2012/01/20:
- New releases went out with minor bug fixes in the following packages: ubuntu-sso-client. ubuntuone-client. ubuntuone-control-panel. ubuntuone-installer. ubuntuone-storage-protocol
- 2012/01/27: -
- New releases went out with minor bug fixes in the following packages: libubuntuone, ubuntuone-dev-tools
Guesses of what should also be in ... Joshua Hoover please review and update
- Several key packages have been updated in Alpha 2, highlights are:
- ubuntuone-installer (version?) - highlights?
- ubuntuone-client (version?) - highlights?
- ubuntuone-sso-client (version?) - highlights?
- ubuntuone-control-panel (version?) - highlights?
- ubuntuone-storage-protocol (version?) - highlights?
- libubuntuone (version?) - highlights?
- ubuntuone-dev-tools (version?) - highlights?
Ubuntu ARM
TO DO: ogra or infinity
- armhf images are now available. 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.
- The following packages have had significant updates:
- ... please fill in
- From weekly status: (delete before milestone release)
- 2012/01/13: -
- 2012/01/20: none atm
- 2012/01/27: none atm
Ubuntu Core
TO DO: ogra or infinity
ubuntu-core cdimage download page is being reworked to be more informative since this isn't done as of 2/1 - remove?
Ubuntu Server
TO DO: Dave Walker
- The following packages have had significant updates:
- ... please fill in.
- From weekly status: (delete before milestone release)
- 2012/01/13: No updates.
- 2012/01/20: No updates.
- 2012/01/27: No updates.
Ubuntu Server Cloud images
TO DO: Antonio Rosales
- The following packages have had significant updates:
- ... please fill in.
- hadoop update?
- From weekly status: (delete before milestone release)
- 2012/01/13: No updates.
- 2012/01/20: No updates.
- 2012/01/27: No updates.
Kubuntu
TO DO: Riddell please review and improve...
- KDE Plasma and Applications 4.8 make your Kubuntu desktop shiny and bling
- Key packages updated include:
- Qt 4.8
- KDE SC 4.8
- KDevelop 4.3 beta
Xubuntu
- From weekly status: (delete before milestone release)
- 2012/01/13: None. Hoping to finish some features soon, though.
- 2012/01/20: None specified.
- 2012/01/27: None Specified
Guesses of what should be in ...Pasi Lallinaho or madnick - please review and update.
- ristretto (version?) has been updated to pick up some new upstream bugfixes
- xfdesktop4 has been updated to support single click to open items, thumbnail support for the desktop.
- xfce4-settings has been updated to include the new mouche/touchpad dialog (backported from 4.9.x)
Edubuntu
- From weekly status: (delete before milestone release)
- 2012/01/13: None
- 2012/01/20: None
- 2012/01/27: None
Guesses of what should be in... Stephane/Jonathan - please review and update.
- wxwidgets2.8 has been merged from Debian allowing us to remove python-central and python-support.
- edubuntu-live has been improved, and edubuntu-artwork has been reworked to better handle unity-greeter and avoid configuration prompt when upgrading from 11.10.
- New version of epoptes, our classroom management tool is now available. It brings support for grouping clients, a few bugfixes including an issue with its SSL certificates validity period (was only 1 month) and updated translations.
Lubuntu
- Only Alternate images are available for Alpha 2
- A new software-center optimized for Lubuntu available by default.
Ubuntu Studio
- From weekly status: (delete before milestone release)
- 2012/01/13: nothing at this time
- 2012/01/20:
- new theme-ui (which will require user feedback)
- ubuntu studio should ship with live-dvd
- 2012/01/27:
- live-dvd
- testing live user real time privileges
- need user feedback on theme, ui, and default settings
- need user feedback on common "desktop" application choices
Guesses of what should be in... ScottL - please review and update.
- Ubuntu Studio now has new theme, user interface and default settings. User review and feedback would be appreciated.
- Ubuntu Studio now ships with a live-dvd image. Feedback on the common "desktop" application choices that have been made default would be welcome.
- Low latency kernel is available for further testing.
Mythbuntu
- From weekly status: (delete before milestone release)
- 2012/01/13: -
- 2012/01/20: -
- 2012/01/27: -
TO DO: get update from superm1
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 2 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
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)
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.
In some cases, the package manager in Ubuntu 11.10 may not be able to decide on a correct unpack ordering when upgrading 64-bit systems with the ia32-libs package installed; if this is the case, it will fail before starting to unpack any new packages with a message something like "Couldn't configure pre-depend libtinfo5 for libncurses5, probably a dependency cycle". 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, 918815 )
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, 834386)
Desktop
Sometimes when locking the screen, a "num lock is on" warning may appear even though num lock isn't actually on. (841541)
Kernel
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. A nice summary of the issue can be read here. RC6 will remain disabled by default for 12.04 due to the potential issues such as hangs or graphics corruption. If you do choose to enable RC6 (ie boot with i915.i915_enable_rc6=1) please let us know if you experience any problems.
Ubuntu Server
??
Ubuntu Cloud
??
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.
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)
Ubuntu Studio
??
Mythbuntu
??
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 99-191-111-134)