[Bug 103025] [GM45] loss of driver acceleration after some time (bisected)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103025

--- Comment #71 from Adric Blake <promarbler14 at gmail.com> ---
I decided to test on a few other different machines that I had around but
couldn't test until now.

System 1:
Almador (gen2) - An 845G system

Testing with the cinnamon desktop, I can load the desktop, but the moment the
gnome-terminal window opens the window flickers/glitches like it would do on my
gm45 and the GPU hangs. No resizing required.

I collected three dumps for each boot I tested this.
First dump was on the stock xf86-video-intel, and the cinnamon desktop
Second dump was an assert-enabled build with a patch to ignore some problematic
asserts. Oddly enough, it hung without hitting any of the kgem/pitch asserts
that I was expecting, despite the same flicker I saw. Running the cinnamon
desktop.
Third dump was an assert-enabled build like before, but I started with the mate
desktop and attempted to replace it with cinnamon from within. It hung without
me opening gnome-terminal, though I already had a terminal window open.

System 2:
Haswell (gen7.5, gt3) - Intel Iris Pro? No msg in kernel log so I'm not sure.
EFI.

I tested this system like I would with my gm45 (cinnamon, resizing
gnome-terminal as stated before), but I could not observe any flickering using
the stock xf86-video-intel driver. I maxed the cpu and spun up as many
instances of glxgears as possible, but resizing the window still failed to
trigger the bug.

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