Bug#689268: [wheezy] Intel HD 4000 (Ivy Bridge) graphics freeze
Per Foreby wrote:
> Correct, apart from the timing. It's been from a few hours to five days
> between the freezes. But with very little interactive use during the
> five days.
Right --- how much interactive use does it take?
I'm guessing that the time when you're not interacting the computer
doesn't affect this bug (regardless of load).
[...]
>> None of the changes from 3.2 to 3.5.5 are jumping out as likely
>> candidates for the fix, but that's a pretty wide range.
>
> What about the MTRR patch that Ben Hutchings mentioned above (commit
> 9e984bc1dffd405138ff22356188b6a1677c64c8)? Or maybe that's just a
> cosmetic change?
That should be cosmetic with your card, though there's always the
possibility of something subtle happening.
[...]
> With up to five days (so far) for a freeze to occur, it might take long to
> narrow down the change, and the computer in question is semi production
> (working from home), so the freezes are very annoying. But I'll give it a
> try in the name of the good cause.
>
> Maybe I should start with running 3.5.5 for a few weeks, just to make sure
> that the freezes really are gone?
Selfishly, I would suggest first trying to reproduce it on a known-bad
kernel and then trying 3.3 or disabling the intel driver.
[...]
> And memtest86+ has been happy.
> I ran an extra pass today (about 2.5 hours) just to make sure, and
> everything was blue and white.
Thanks for checking.
[...]
> Btw, I found http://www.linuxbsdos.com/2012/10/06/ubuntu-12-04-lts-and-12-10-beta-2-on-intel-ivy-bridge-powered-computer/.
> One of the comments indicate that 3.4 fixes some sort of freeze problem on
> ivy bridge/HD4000. And the partiallysanedeveloper page that I linked to in
> the initial bug report says that the freezes are gone in 3.3.
Yes, it would be nice to narrow this down...
If you blacklist the i915 kernel module and use the vesa X driver,
does that avoid trouble?
Thanks,
Jonathan
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