I reverted "drm/i915: GFX_MODE Flush TLB Invalidate Mode must be '1' for scanline waits" and rebuilt kernel 3.2.0-39. I haven't had the problem ever since.
I reverted "drm/i915: GFX_MODE Flush TLB Invalidate Mode must be '1' for scanline waits" and rebuilt kernel 3.2.0-39. I haven't had the problem ever since.