[Bug 97872] New: GPU hang with libva (gstreamer)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97872

            Bug ID: 97872
           Summary: GPU hang with libva (gstreamer)
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: florent.thiery at ubicast.eu
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 126659
  --> https://bugs.freedesktop.org/attachment.cgi?id=126659&action=edit
gpu crash dump

hw platforms:
- Skylake i7 NUC6i7KYK (GPU Iris Pro 580)
- Skylake i5 NUC6i5SYK (GPU Iris Graphics 540)

The problem does not happen with Skylake i3 NUC6i3SYL (GPU Iris HD 520); it
happens both headless and under xorg

libdrm: 2.4.70

Running the following command twice in a row (quickly) results in a GPU reset
(gstreamer master required):

gst-launch-1.0 videotestsrc num-buffers=100 ! video/x-raw\,\
format\=\(string\)I420\,\ width\=\(int\)1920\,\ height\=\(int\)1080\,\
framerate\=\(fraction\)30/1 ! vaapih264enc tune=low-power ! fakesink
silent=false -v

[  613.290101] [drm] stuck on bsd2 ring
[  613.290989] [drm] GPU HANG: ecode 9:3:0xcb79ffc4, in videotestsrc0:s [2622],
reason: Engine(s) hung, action: reset
[  613.290992] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[  613.290995] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[  613.290997] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[  613.290999] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[  613.291001] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[  613.293290] drm/i915: Resetting chip after gpu hang

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