solve the IBM Thinkpad A20p display problem in Lubuntu 11.04

xrandr: Failed to get size of gamma for output default
screen 0: minimum 640 x 350, current 1400×1050, maximum 1400 x 1050
default connected 1400x1050_0_0 0mm x 0mm

$cvt 1400 1050
Modeline “1400x1050_60.00” 121.75 1400 1488 1632 1864 1050 1053 1057 1089 -hsync +vsync

$xrandr –newmode “1400x1050_60.00” 121.75 1400 1488 1632 1864 1050 1053 1057 1089 -hsync +vsync

$xrandr –addmode default 1440x1050_60.00

$xrandr –output default –mode 1440×1050

The xorg.conf file at /etc/X11 is as follows:
Section “Monitor”
Identifier “Monitor0”
VendorName “IBM”
ModelName “ITSX93”
HorizSync 30-100
VertRefresh 50-100
ModeLine “1400×1050” 122.00 1400 1464 1784 1912 1050 1052 1064 1090 -HSync -VSync

Section “Screen”
Identifier “Screen0”
Device “Card0”
Monitor “Monitor0”
DefaultDepth 24
SubSection “Display”
Viewport 0 0
Depth 24
Modes “1440×1050”

Reboot, it usually should work fine now.
If there is anything wrong, check /var/log/Xorg.0.log for logs.

If the above still does not work, maybe need to do the following:
dpkg-divert –list | grep fglrx | cut -d’ ‘ -f3
sudo dpkg-divert –remove /usr/lib/
I replaced the by as the latter is the file in the folder /usr/lib.
Then do
sudo apt-get purge fglrx fglrx-modaliases fglrx-amdcccle
sudo rm -r /etc/ati /etc/X11/xorg.conf
sudo apt-get install –reinstall libgl1-mesa-glx libgl1-mesa-dri xserver-xorg-core xserver-xorg-video-ati

I ignored the messages saying there is no fglrx-modaliases and so on.

The credit goes to: and .

Other references:

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2 Responses to solve the IBM Thinkpad A20p display problem in Lubuntu 11.04

  1. vitalbodies says:

    First off, thank you posting this!
    This did not work for me, although I tried it on Lubuntu 12.10. Have you gotten your A20p to work on Ubuntu 12.04 or Lubuntu 12.10?

    Will I have to fall back to 11.04?

    You can follow my struggle or help out within the Ubuntu forums here:

    • huaxin79662 says:

      @vitalbodies: thanks for visiting this blog… Sorry, I haven’t tried Lubuntu 12.x because i have basically given up the A20p that is too old too slow in handling my daily needs; and, IMHO, the time needed to solve this problem does not worth it — better switch to another computer and save the troubleshooting time to more valuable things. Good luck!

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