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== Rolling back === == Rolling back ==

The problem

As Described in X/Troubleshooting/IntelPerformance, some laptops with intel graphics hardware experience a serious performance degration after upgrading from intrepid to jaunty. The reasons for that are already explained on that page. This page explains how to revert the driver to the version in intrepid.

Installing the package

Add the following lines to your /etc/apt/sources.list:

 deb jaunty main
 deb-src jaunty main

See for additional information how to add GPG keys to your system.

Install the driver:

 $ sudo apt-get install xserver-xorg-video-intel-2.4

Now you should be set. Restart X and see if the graphics performance from intrepid is restored.

Rolling back

If the driver does not work for you, or is not better, you should rollback to the original Ubuntu one. Remove the two lines from /etc/apt/sources.list again, and install the original one again:

 $ sudo apt-get install xserver-xorg-video-intel

If does not start at all, you should change to a text terminal by pressing Ctrl+Alt+F2, logging in, and use "sudo nano" to edit /etc/apt/sources.list. After installing xserver-xorg-video-intel, restart the computer with "sudo reboot".


If you have tested the package, please report your findings (broken|same|better) and also your PCI ID:

  lspci -nn | grep VGA





[8086:27a2] (rev 03)

Performance restored


compiz/3d performance is comparable to intrepid, even planet-penguin-racer is playable again

[8086:2a42] (rev 07)

Performance improved


much better performance than 2.6 driver with EXA+greedy or UXA, only problem is that it gets physical size of my 12.1" panel wrong (have to use xrandr --fbmm to fix it manually)

[8086:2a02] (rev 03)

Slightly worse


With the normal Jaunty driver, at least with no open Windows, the Compiz effects were fluid. Now, I experiment lack of performances even with no open windows. Apart of that, no change (even after reboot).

ReinhardTartler/X/RevertingIntelDriverTo2.4 (last edited 2010-02-21 17:25:28 by 209-6-50-35)