DellLatitudeX1Legacy

Current Issues

VBE

The VBE (VESA BIOS Extensions) of the X1 BIOS (A05 and earlier) only know the following VBE modes (ignoring the 8 and 16 bpp modes):

  • Mode 50 : 640x480, 32 bits/pixel
  • Mode 52 : 800x600, 32 bits/pixel
  • Mode 54 : 1024x768, 32 bits/pixel
  • Mode 58 : 1280x1024, 32 bits/pixel
  • Mode 5a : 1600x1200, 32 bits/pixel
  • Mode 5c : 1920x1440, 32 bits/pixel

As you can see, the X1 does not even support its own internal display, let alone many external displays you could connect. This is the reason you only get 1024 x 768 instead of the native 1280 x 768 out-of-the-box. In order to fix this, you have to patch one of the modes. You can use "855resolution", "915resolution" or a development version of the i810 driver for X.org (TODO: instructions). I recommend patching mode 5c, because you would most certainly not need 1920 x 1440.

I tried bugging Dell about this defect, but I got no reply. Maybe you could try, too?

CPU Frequency Scaling

I just experienced problems with CPU frequency scaling and BIOS A05, on both Dapper and Breezy. On A05, there are less available frequencies. Have a look at /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies:

  • A02: 1100000 1000000 900000 800000 600000
  • A05: 1100000 800000 600000

Also, /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq:

  • A02: 1100000
  • A05: 600000

This leads to always slow performance. Now, it could be possible that Dell got thermal problems with the passive cooling, and updating to more conservative thermal values was their last resort. Nevertheless, I decided to go back to A02 (haven't tried A03 and A04 though). My CPU temperature (/proc/acpi/thermal_zone/THM/temperature) oscillates at around 58 degress celsuis.

SD card reader

The SD card reader now works fine under Dapper.

Modem

As far as I know, nobody has gotten the modem to work yet. I heard there might be a commercial driver, though.

Hardware details

Hardware Information

Installation successful

yes

yes

yes

Screen & Monitors

Device

Works?

Bug #

in Hoary?

in Breezy?

in Dapper (Flight 1)?

In Dapper (Flight 5)

Screen

yes

yes

yes

yes

Correct resolution?

no, 1024x768 rather than 1280x768

no, 1024x768 rather than 1280x768

no, 1024x768 rather than 1280x768

no, 1024x768 rather than 1280x768 (note 1)

# Launchpad 6271

Correct refresh rate?

yes

no

no

yes (note 2)

#15051

3D Acceleration

guess not, glxinfo returns "direct rendering: No"

yes

yes

no (note 3)

#Launchpad 36707

External monitor works?

yes

yes

untested

partial (note 4)

External monitor - mirrors

untested

untested

untested

no

External monitor - extend desktop

no, but yes with special config

not supported

untested

no

Power Management

Battery detected?

yes

yes

untested

yes

Hibernates?

untested

no

untested

yes

#15189

Sleep

untested

yes

untested

partial (note 5)

Dim monitor on battery power and Blank monitor on inactivity

Untested

yes

untested

yes

Lid Close

yes

yes

yes

yes

Cpu frequency scaling

yes

yes

yes

yes

Sound

Sound works?

yes

yes

yes

yes

Correct volume?

yes

yes

yes

yes

Hardware volume switch

yes

yes

yes

yes

Headphone jack

yes

yes

yes

untested

Mic jack

untested

untested

untested

untested

Networking

Wired NIC

yes

yes

untested

partial (note 6)

Wireless NIC

no

no

untested

no

#14563

Firewire

yes

yes

untested

untested

Bluetooth

no

no

untested

untested

#15711

Modem

no

no

untested

untested

#14158

Touchpad & Mice

Touchpad

yes

yes

yes

yes

Touchpad - Doubletap = double click

untested

yes

yes

yes

Touchpad - Scroll down side

yes

yes

yes

yes

External mouse - USB

yes

yes

yes

yes

Additional Hardware

CD/DVD drive

yes

yes

untested

yes (note 7)

CF cards

no

no

untested

untested

#14495

SD cards

no

no

untested

untested

#14081

internal keyboard

yes

yes

yes

yes

Function and other keys

Fn key

Operation

Keycode

Works?

Bug #

in Hoary?

in Breezy?

in Dapper (Flight 1)?

+ Esc

Standby

no

yes

no

+ F1

Hibernate

0x8a

no

no

untested

#14446

+ F2

Wireless Switch (WLAN/BT)

yes

yes

yes

+ F3

Battery

0x87

no

no

no

#14446

+ F4

Num Lock

yes

yes

yes

+ F5

Scroll Lock

no

no

no

+ F8

CRT/LCD

Untested

yes

yes

+ F10

Eject CD

0x89

no

no

untested

#14446

+ F11

Print Screen

yes

yes

yes

+ F12

Pause

untested

untested

untested

Other special keys

Key

Operation

Keycode

Works?

Bug #

in Hoary?

in Breezy?

in Dapper (Flight 1)?

Close Lid

yes

yes

yes

Power Button

Shutdown

yes

untested

untested

Fn + End

Volume Mute

0xa0

no, config in "Keyboard Shortcuts"

yes

yes

Fn + Pg Up

Volume Up

0xb0

no, config in "Keyboard Shortcuts"

yes

yes

Fn + Pg Down

Volume Down

0xae

no, config in "Keyboard Shortcuts"

yes

yes

Fn + Crsr Up

Screen Brightness Up

yes

yes

yes

Fn + Crsr Down

Screen Brightness Down

yes

yes

yes

Notes

Overall, Breezy Badger runs great on the X1, if you can live with having to patch the VBE BIOS and the other current issues.

1. The native resolution is detected properly with an updated 915resolution package from https://launchpad.net/distros/ubuntu/+source/915resolution/+bug/6271

2. The refresh rate displays as 61Hz instead of the expected 60, but it doesn't cause any issues. I guess it's just rounded or something.

3. Direct rendering is not working - the video card hasn't been detected, it's using the vesa driver. Odd since it has worked for previous users.

4. The external monitor works, but mine can't display the native resolution. Some negotiation for resolutions would be nice.

5. Suspend works, and the laptop resumes, but takes a long time (~20s) in text mode, and doesn't swap back to X when done. For comparison, the laptop is capable of resuming within about 3s.

6. Wired network works, but when the cable is disconnected the network interface doesn't go down, so everything waits indefinately for responses.

7. External DVD drive works, but won't unmount/eject when it's button is pressed. It does eject fine from software.

Comments by users

Hi, actually some of the items that are specified here as not working in Breezy, actually do work. See: https://wiki.ubuntu.com/InstallingUbuntuOnADellLatitudeX1

Actually, the tests on this page do not allow to configure anything by hand. If it does not work out of the box, or can be configured with the GUI, it counts as "not working". Of course, you can get many things to work with some custom setup (that's what I do, too), but instructions for this is out of scope for this test protocol.


  • I've upgraded to the A05-BIOS, and it now seems to force thermal throtteling more often now. But when it cools off again, it easily goes to full 1.1 GHz again.
  • The resume-from-suspend is delayed by timeouts in the kernel-module for the SD-reader. If the modules sdhci and mmc_core are removed, the resume happens at full speed. According to the sdhci mailing-list, this is due to Ubuntu using an old version of sdhci in its kernels.

  • My X1 sometimes makes some very high-pitch beeps, which seemingly is due to a switch in the power-management hardware running at to high speed. I've disabled this by adding echo 2 > /sys/module/processor/parameters/max_cstate to /etc/init.d/bootmisc.sh. This does however seem to limit the laptops battery life a little. It seems other people have success setting some update-frequency lower/higher to rid the noise, without sacrificing battery life. Anybody got something working?

LaptopTestingTeam/Old/DellLatitudeX1Legacy (last edited 2010-02-24 14:45:27 by primes2h)