(In reply to Ratchanan Srirattanamet from comment #48)
> Will Pierre Moreau's patch be merged? This patch fix acceleration on system
> with only 9400M too. Symptom is X can start but gets locked up when I run
> glxgears for a while. System is Ubuntu 14.10 with Linux 3.17 compiled from
> git. After apply this patch, the symptom disappear.

Hi Ratchanan,

My patch wasn't merged into 3.17 as it was a bit too short before the release,
plus it didn't had time to be properly tested on other machines to check if it
didn't introduce some regressions; I'll use the extra time to reverse-engineer
the registers I modify. However it should be able to go into 3.18 if
reverse-engineering goes well.