[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 #16 from Stephan Fackler <rantasub at gmail.com> ---
Created attachment 136865
  --> https://bugs.freedesktop.org/attachment.cgi?id=136865&action=edit
Simple script which leads to GPU hang when piped into lemonbar-xft

I have now further investigated the reason for the GPU crash on my laptop and
could construct the following minimal example. Steps to reproduce the crash on
my laptop:

1) Install https://github.com/krypt-n/bar which gives you the lemonbar
executable
2) ./crash_me.sh | lemonbar -f "Droid Sans"

The script pipes lines into lemonbar which then should be shown on the bar.

Further observations:

1) the GPU hang occurs after the first update of lemonbar. In the script this
is after 1 second (sleep 1). If this is changed to e.g. sleep 30 the crash
occurs after 30 seconds.
2) The crash occurs for some XFT fonts, but not for all. I suspect that the
crash orginates from XFT font rendering.
3) Changing the echod text to something different results in no further crash.
So oddly, this seems to be a rather fine tuned issue.
4) The crash occurs independently of the chosen X window manager.

If I can help further, I will try to do so.

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