Ubuntu
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  1. Bug #252094
  2. Comment #165

Comment 165 for bug 252094

Revision history for this message
pierrestz (coolos) wrote : Re: Poor graphics performance and rendering errors on Intel GM965 system, Ubuntu 8.10

I think the performance regression of intel driver is due to the lost of the 'INTEL_BATCH' variable.

This variable can be set in Hardy to get a huge performance boost in 3D (can be seen in glxgears, but also openarena, compizeffects...)
for example in Hardy, compare the output of :
glxgears
and
INTEL_BATCH=1 glxgears
i have +100% fps on i915 (1024*600 16bpp) : result 1480fps

This variable is not set by default on a Hardy install, but it is set when i launch compiz from a console.

The problem : this variable is no more used in intel driver (deprecated) so Intrepid can't benefit fom it. From what i understand (being far from an expert ;) ) we have to wait for GEM/TTM to get the same performance in the future...

If someone can recompile the intel driver sources used in Hardy, to make it work under intrepid, maybe we can get better results ?

see my previous bug on this subject : https://bugs.launchpad.net/bugs/284082