Ubuntu EeePC-optimized Kernel

Graphics performance regression : no INTEL_BATCH trick

Reported by pierrestz on 2008-11-16
4
Affects Status Importance Assigned to Milestone
Ubuntu EeePC Kernel
Undecided
Unassigned

Bug Description

The intel graphic driver in Ubuntu 8.10 is very weak at 3D, the Ubuntu 8.04 intel driver was better.
This is due to the INTEL_BATCH variable which disappeared in the last versions.
I posted a bug about that here : https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/284082 , but it won't be fixed.

So maybe you guys at Ubuntu eeepc kernel team can do something about that ?

"The INTEL_BATCH=1 environment variable doesn't seem to work in Intrepid.

This option is used by many users to improve 3D performance in compiz, games, etc... on intel chipsets (i915, i945...)
For example, without this option, i only get 550fps in glxgears on my eeepc 900A, whereas i can get 1300fps when i enable this option (in hardy)
I know there were some remarks about some stability problems with screensavers (see bug #195843) and it was decided that this option won't be set to default.
But it think it is very important (if possible) to give users the choice to set it or not, as it really makes a big difference in many applications.

thx !

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