[Bug 104411] [SKL] GPU HANG: ecode 9:0:0x85dffffb, in X [3938], reason: Hang on rcs0, action: reset with google maps in firefox

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104411

--- Comment #7 from Stephan Fackler <rantasub at gmail.com> ---
I very likely have the same bug on my Thinkpad T470 (curiously, Axel Fischer is
using a Thinkpad T460 model) and can confirm mostly everything what has already
been said.

- The GPU hang occurs reliably when using Mesa 17.3.0 and 17.3.1. Downgrading
to 17.2.6 on Arch fixed the issue for me as well.
- Everything runs without any problems as soon as INTEL_DEBUG=norbc is set.

However, for me the GPU hang always occurs already a bunch of seconds after
starting Xorg. Currently, I have not yet made the effort to do a git bisect.

I append my dmesg log und and GPU crash dump in the hope to give further hints.
If I can help further, just tell me and I will try to do so.

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