Ah, ok that makes more sense.
I think what might be going on here is two separate bugs. GPU lockup
bugs generally involve the whole system locking up, however we have a
known problem where the lockup handler sometimes has false-positives for
some reason we haven't figured out. I think the crash popups you're
seeing are these false positive type bugs.
The slowdown is probably a second unrelated problem. Might not even be
X causing it. As we have plenty of bug reports about the false gpu
lockups, I think this bug report should focus on the slowdown issue
instead; sounds like that's what you care about.
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: Incomplete => New
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https://bugs.launchpad.net/bugs/826504
Title:
[i945gm] GPU lockup EIR: 0x00000010 PGTBL_ER: 0x00000100
render.IPEHR: 0x01000000
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