[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 #50 from Adric Blake <promarbler14 at gmail.com> ---
The git version of the driver (xf86-video-intel) has the "disabling
acceleration" fix, which honestly is the most annoying issue. I don't know how
to install a git version on Ubuntu, as I never got used to their package
system. Perhaps install a PPA? The relevant intel driver package should be
xserver-xorg-video-intel, unless you use the modesetting driver.

Downgrading to the linux LTS kernel would probably work, assuming the bug that
indirectly caused the accel loss is also responsible for the hangs. Be warned
that the LTS kernel might not have all the features needed for an updated
system, particularly if you use an up-to-date version of systemd. I wouldn't
use the 4.10 kernel because it doesn't receive any further patches and could be
a risk to your security or data.

If you or anyone else can produce a reliable test procedure that trips the bugs
(pitch/tiling or the GPU hang), that would be helpful.

Have patience. :)

--- Comment #51 from Adric Blake <promarbler14 at gmail.com> ---
Example of one of the types of corruption visible on rare occasion. Seems to
occur after hitting one of the asserts (as visible behind the corrupted
window). These images persisted and did not quickly disappear after taking the
picture. They only disappeared if the source image was redrawn.

Bugzilla doesn't seem to be accepting uploads due to some bug. So, have some
hosted links instead.

Corruption (Type 1)
https://i.imgur.com/MK7LO97.jpg
https://i.imgur.com/i8bsuM0.jpg

Corruption (Type 2)
https://i.imgur.com/i9g2ddV.jpg
https://i.imgur.com/n7enyeB.jpg
https://i.imgur.com/gbTIqNA.jpg
https://i.imgur.com/kQqvVyx.jpg

--- Comment #52 from Adric Blake <promarbler14 at gmail.com> ---
The latest drm-tip kernel still presents the underlying bug.

linux-drm-tip-git 4.15+2329+g897018779f8b+726780-1
xorg-server 1.19.6+13+gd0d1a694f-1
mesa 17.3.3-2
libdrm 2.4.89-1
xf86-video-intel 1:2.99.917+811+g5c7e4e0e-1

I built a debug version of the xf86-video-driver to test for the bug again.

The kernel commit:
commit 897018779f8b9aeac758688f0fd21169dfe66fdf (HEAD -> drm-tip,
origin/drm-tip, origin/HEAD)
Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
Date:   Fri Feb 9 18:19:20 2018 +0200

    drm-tip: 2018y-02m-09d-16h-18m-21s UTC integration manifest

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