[Bug 105146] [kbl] GPU HANG: ecode 9:0:0x85dffffb, in Xorg

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105146

--- Comment #2 from Simon <simonmorgan at slimjimsoftware.co.uk> ---
Hopefully this may help.

I've had the same issue since an upgrade to Mesa 17.3.4. This was easily and
consistently reproducible when using NetBeans 8.2, opening a file browser and
clicking on an empty area of the horizontal scroll bar so as to get the file
browser to jump further along the files list. Every time I tried this it would
consistently cause the screen to hang, the mouse would work but nothing else
responded. After a couple of minutes I would be dropped out of the desktop andf
back to the login manager. Running dmesg gave me not much more than the
following:

[ 5072.768779] [drm] GPU HANG: ecode 9:0:0x85dffffb, in Xorg [11414], reason:
Hang on rcs0, action: reset
[ 5072.768785] i915 0000:00:02.0: Resetting rcs0 after gpu hang
[ 5086.777610] i915 0000:00:02.0: Resetting rcs0 after gpu hang
[ 5096.761705] i915 0000:00:02.0: Resetting rcs0 after gpu hang
[ 5104.761736] i915 0000:00:02.0: Resetting rcs0 after gpu hang
[ 5112.761783] i915 0000:00:02.0: Resetting rcs0 after gpu hang

I tried all of the Intel driver fixes posted around various forums across the
internet but nothing worked, the only thing that has finally stopped this was
downgrading to Mesa 17.3.2.

After the downgrade to Mesa 17.3.2 I can no longer reproduce this error. 

This is an Arch Linux system with the latest vanilla 4.14.20 kernel running the
Plasma (KDE) desktop.

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