Bad 3d performance of intel ironlake

Question

I'm using ubuntu 13.04 and got VERY bad 3d performance with intel ironlake comparing with a windows installation.

Is there any way I can improve this?

I already tried various paramaters of the i915 kernel module, but that didn't help much... SNA is already enabled.

Add the following option in grub file

i915.semaphores=1

Then

 sudo update-grub

Mine is

 GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.lvds_downclock=1 drm.vblankoffdelay=1  i915.semaphores=1"

Try adding this to /etc/environment

 CLUTTER_PAINT=disable-clipped-redraws:disable-culling

[RESOLVED] Poor performance on Ironlake compared to old Intel GPU Intel Ironlake OpenGL Performance On Mesa 9.1