[Bug 110228] [cfl] GPU hang when running UE4Editor

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110228

--- Comment #14 from Andrzej Broński <koxu1996+bugs.freedesktop.org at gmail.com> ---
(In reply to Denis from comment #10)
> thanks for suggestion, but in my case, I think, its unnecessary.
> 
> So, what I did:
> 1. build and boot into drm-tip kernel (with debug flags enabled)
> 2. Got "top" results during running UE4 (it doesn't look like OOM...)
> 3. Got a UE4editor log during running it
> 
> Strange that core dump wasn't generated, when I stacked with hang. I will
> attach these logs to the bug report. Any ideas and suggestions, what to
> check or try - appreciated.
> 
> BTW - PC hangs in both cases, when I am building "empty" project but with
> samples, and if I build it without them (I thought that problem might be in
> some default pre-set, which can compile some shaders, for example)

I doubt UE4 logs are useful, because it's kernel-level problem. I looked into
your kernel logs and there is only one interesting part:
~~~
кві 02 13:12:23 manjaro-pc kernel: i915 0000:00:02.0: GPU HANG: ecode
9:1:0xfffffffe, in UE4Editor [4360], hang on rcs0
кві 02 13:12:23 manjaro-pc kernel: [drm] GPU hangs can indicate a bug anywhere
in the entire gfx stack, including userspace.
-- Reboot --
~~~
However if you want to capture full crash log along with
/sys/class/drm/card0/error it's not easy task - I used netconsole for it. You
can contact me at andrzej1_1 at o2.pl and I will give you details how to do it.

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