[Bug 102821] New: system hangs - [drm] GPU HANG: ecode 9:1:0xeeffefa1, in Xorg [975], reason: Hang on bcs0, action: reset

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102821

            Bug ID: 102821
           Summary: system hangs - [drm] GPU HANG: ecode 9:1:0xeeffefa1,
                    in Xorg [975], reason: Hang on bcs0, action: reset
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: yotam.medini at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 134294
  --> https://bugs.freedesktop.org/attachment.cgi?id=134294&action=edit
except from /var/log/syslog & Xorg.0.log.old

Sep 17 15:42:55 figini kernel: [21119.663759] [drm] GPU HANG: ecode
9:1:0xeeffefa1, in Xorg [975], reason: Hang on bcs0, action: reset
Sep 17 15:42:55 figini kernel: [21119.663763] [drm] GPU hangs can indicate a
bug anywhere in the entire gfx stack, including userspace.
Sep 17 15:42:55 figini kernel: [21119.663765] [drm] Please file a _new_ bug
report on bugs.freedesktop.org against DRI -> DRM/Intel
Sep 17 15:42:55 figini kernel: [21119.663766] [drm] drm/i915 developers can
then reassign to the right component if it's not a kernel issue.
Sep 17 15:42:55 figini kernel: [21119.663767] [drm] The gpu crash dump is
required to analyze gpu hangs, so please always attach it.
Sep 17 15:42:55 figini kernel: [21119.663769] [drm] GPU crash dump saved to
/sys/class/drm/card0/error
Sep 17 15:42:55 figini kernel: [21119.664027] drm/i915: Resetting chip after
gpu hang
Sep 17 15:42:55 figini kernel: [21119.666159] BUG: unable to handle kernel NULL
pointer dereference at 0000000000000070
Sep 17 15:42:55 figini kernel: [21119.666266] IP: reset_common_ring+0x9a/0x100
[i915]
Sep 17 15:42:55 figini kernel: [21119.666293] PGD 171d40067 
Sep 17 15:42:55 figini kernel: [21119.666294] P4D 171d40067 
Sep 17 15:42:55 figini kernel: [21119.666309] PUD 175d67067 
Sep 17 15:42:55 figini kernel: [21119.666357] PMD 0 
Sep 17 15:42:55 figini kernel: [21119.666374] 
Sep 17 15:42:55 figini kernel: [21119.666399] Oops: 0000 [#1] SMP

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