[Bug 110228] New: [i915] GPU hang when running UE4Editor

[bugzilla-daemon at freedesktop.org]

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

            Bug ID: 110228
           Summary: [i915] GPU hang when running UE4Editor
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: koxu1996+bugs.freedesktop.org at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 143761
  --> https://bugs.freedesktop.org/attachment.cgi?id=143761&action=edit
/sys/class/drm/card0/error

# Bug description

Kernel is freezing completely whenever I open "Unreal Engine 4" project - even
SysRq keys don't work. However with netconsole I catched some error logs
related to GPU:

~~~
[  381.112949] [drm:drm_ioctl [drm]] pid=775, dev=0xe200, auth=1, I915_GEM_MMAP
[  381.113119] [drm:drm_ioctl [drm]] pid=775, dev=0xe200, auth=1,
I915_GEM_EXECBUFFER2_WR
[  381.113146] [drm:drm_ioctl [drm]] pid=775, dev=0xe200, auth=1,
I915_GEM_THROTTLE
...
[  387.161861] [drm] GPU HANG: ecode 9:0:0x8ed9fff2, in UE4Editor [3127],
reason: hang on rcs0, action: reset
[  387.161866] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[  387.161868] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[  387.161870] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[  387.161871] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[  387.161873] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[  387.162881] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
...
[  387.164405] i915 0000:00:02.0: Resetting chip for hang on rcs0
~~~

Due to freeze I was able to obtain part of /sys/class/drm/card0/error which I
am attaching along with dmesg output.


# System environment

-- chipset: Z370
-- system architecture: x86_64
-- xf86-video-intel: 1:2.99.917+863+g6afed33b-1
-- xorg-server: 1.20.4-1
-- mesa: 19.0.0-1
-- libdrm: 2.4.97-1
-- kernel: 5.0.3.arch1-1
-- Linux distribution: Arch Linux
-- Machine or mobo model: Z370 SLI PLUS
-- Display connector: DisplayPort

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