[Bug 109170] New: GPU HANG: ecode 9:0:0x85dffffb (esp. chrome with hardware-acceleration, also elsewhere) - UHD Graphics 620

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109170

            Bug ID: 109170
           Summary: GPU HANG: ecode 9:0:0x85dffffb (esp. chrome with
                    hardware-acceleration, also elsewhere) - UHD Graphics
                    620
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: lohmaier at gmx.de
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 142908
  --> https://bugs.freedesktop.org/attachment.cgi?id=142908&action=edit
/sys/class/drm/card0/error , hang triggered by chrome w/hw-accel on youtube

On a laptop with Intel Core i7-8550U and integrated UHD Graphics 620, I
experience frequent hangs when using chrome browser watching youtube or using
mpv to playback video.
If I disable use of hardware acceleration in chromium browser or force software
decoding/rendering in mpv, the crashes are way less frequent.

With hardware-acceleration enabled I almost immediately get a gpu hang in
chromebrowser when visiting youtube (starting a video is guaranteed to trigger)

Symptoms of hang differ from frozen image for a few seconds after which it
recovers (although next error then only is a few minutes away, until it reaches
a point where it cannot recover anymore), to complete freezes (still image
shown, audio loops the last couple seconds, no reaction to keyboard whatsoever,
cannot even use magic sysRq anymore) to crashes of Gnome3/wayland (can switch
to virtual console and login/trigger reboot)

Distro: Mageia (Cauldron/development)
kernel: 4.19.12
mesa:  18.3.1
chromium-browsser: 70.0.3538.77

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