Comment 12 for bug 647071

Per the following discussion on #ubuntu-devel, I've built pitti a test kernel that reverts the 3 patches for CVE-2010-2962 in case he notices the issue returning. The patches for CVE-2010-2962 touched the i915 driver and would have been my initial assumption for being the culprit. The test kernel can be found at:

http://people.canonical.com/~ogasawara/lp647071/amd64/

<ogasawara> pitti: Re: https://bugs.edge.launchpad.net/ubuntu/+source/linux/+bug/647071/comments/11 , are you seeing this on an i386 or amd64 box? 3 patches touch the i915 driver so I can build you a test kernel with those reverted to see if they are the culprit.
<pitti> ogasawara: actually I haven't seen it for a few hours now, so don't worry too much about it for now
<pitti> ogasawara: I'm on amd64
<ogasawara> pitti: ok, I'll build you a test kernel anyways in case it returns. How often was it happening at first?
<pitti> ogasawara: if I'm able to reproduce, I'll boot with drm.debug=0x02 (or whatever that was called like)
<pitti> ogasawara: I saw it flicker about 3 or 4 times
<pitti> with perhaps a minute or two in between
<pitti> I'm not sure why it only happened back then
<pitti> I had kvm open, that was the primary difference to what I have now