[Bug 96878] [Bisected: cc2d0e6][HSW] "GPU HANG" msg after autologin to gnome-session

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96878

--- Comment #12 from Aaron Watry <awatry at gmail.com> ---
I just spent last night bisecting this same issue on my machine (haswell
mobile), but I found the following results:

75e095: good (commit before cc2d0e6, no artifacts)
cc2d0e6: good-ish (no hangs, but some artifacts that weren't observed
previously when at the login screen)
39fdee6: bad (First bad commit that hangs GPU, reverting fixes the hang)

cc2d0e6 doesn't hang my GDM login screen, but there's some odd visual artifacts
that didn't appear before this commit.

In order to trigger the hang, I have to do a cold boot following the mesa
build/install. A warm restart of gdm doesn't seem to trigger the issue.

Note: 39fdee6 can be cleanly reverted, and after doing that my hangs go away,
but the visual artifacts caused by cc2d0e6 remain.

We may want to mark 96899 (which I just opened a few minutes ago) as a
duplicate of this...

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