[Bug 94515] xorg-server 1.18.2 freeze desktop on i915

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Sat Mar 12 20:16:37 UTC 2016


https://bugs.freedesktop.org/show_bug.cgi?id=94515

--- Comment #4 from Chris Wilson <chris at chris-wilson.co.uk> ---
(In reply to FadeMind from comment #0)
> After installing lastest Xorg update 1.18.2 and reboot I have serious issue
> . After while whole GUI just freeze Mouse and Keyboard not repond at all.
> Only hard power off (via pushing power button 5 sec. works) shutdown laptop. 
> I using linux-zen kernel 4.4.5 now.
> In Xorg I have weird:
> 
> [ 232.965] (II) GetModeLine - scrn: 0 clock: 71800
> [ 232.965] (II) GetModeLine - hdsp: 1366 hbeg: 1414 hend: 1446 httl: 1526
> 
> in lots of lines after launching google-chrome too.

That's extremely suspect indeed. That message comes from Xext/vidmode.c which
was recently rewritten. Maybe using x11trace with google-chrome would reveal
the loop it gets stuck in, or gdb'ing the Xserver, or using perf. Bisecting the
Xserver would also be useful, my guess would be 

commit f175cf45aebcdda53f3ae49c0eaf27da1f194e92
Author: Olivier Fourdan <ofourdan at redhat.com>
Date:   Wed Feb 10 09:34:34 2016 +0100

    vidmode: move to a separate library of its own

but hopefully it is a smaller commit.

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