At work we have computers running Ubuntu 12.04 with kernel 3.2.0-29 and 12.10
with kernel 3.5.0-26.
All computers are now getting random bug with unity or even with unity-2d or
gnome-panel, since we started upgrading kernel the 20 March (kernel 3.2.0-29
was installed at this date).
By merging/sorting changelog of both kernel I found 5 changes applied to
both kernel, so regression was probably introduced by one of them.
* drm/i915: Disable AsyncFlip performance optimisations
- LP: #1117693
* drm/i915: dump UTS_RELEASE into the error_state
- LP: #1117693
* drm/i915: GFX_MODE Flush TLB Invalidate Mode must be '1' for scanline waits
- LP: #1117693
* drm/i915: Implement WaDisableHiZPlanesWhenMSAAEnabled
- LP: #1117693
* drm/i915: Invalidate the relocation presumed_offsets along the slow path
- LP: #1117693
On all of your computer simply running glxgears make the GPU Hung occur
instantly with affected kernel.
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https://bugs.launchpad.net/bugs/1140716
Title:
[regression] 3.5.0-26-generic GPU hangs
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