[Bug 80568] [gen4] GPU Crash During Google Chrome Operation

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Nov 21 07:51:45 PST 2014


--- Comment #59 from Alex <alexsecret at hotmail.com> ---
(In reply to shachar from comment #57)
> I did few tests to see if I can narrow down the cause of the issue, here are
> my insights so far:
> - It seems that the bug is triggered only if AccelMethod is SNA. Setting the
> AccelMethod to UXA seems to be hiding the issue with chrome/chromium. Issue
> still shows up when running glmark2 -b ideas (though this might be a
> different issue)
> - I tried changing the Xorg/XFree driver versions. I used the freedesktop
> git, and went all the way back to 2.20.0, where SNA was officially
> introduced. Bug is reproducing there as well. I attach a small patch to make
> the code from 2.20.0 compile on modern Xorg version.
> - Last April was when Ubuntu released their new "long term support" version,
> this (and derivatives) might explain part of the spike in the bug reports at
> this point, as large number of people jumped ship to have SNA enabled by
> default in their distro
> - The ArchLinux page on Intel graphics (
> https://wiki.archlinux.org/index.php/Intel_graphics ) contains few pointers
> to additional tweaking knobs to try out. Going to try them next when I have
> some free time.

I'm really surprised to see that switching to UXA really helped you because
that exact test was the very first I did when the bug first appeared and it
didn't work at all.  Actually, I didn't even have to visit the Web Store in
order to produce it.  I just attempted to watch a random video on Youtube and
the screen went black at once.  I didn't even need a second test.  :)

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