[Bug 92623] New:=?UTF-8?Q?=20Reproducible=20GPU=20hang=20on=20Intel=20HD5500=20=E2=80=94=20ecode=208?=:0:0x84df3c1c

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92623

            Bug ID: 92623
           Summary: Reproducible GPU hang on Intel HD5500 — ecode
                    8:0:0x84df3c1c
           Product: DRI
           Version: XOrg git
          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: delroth at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 119120
  --> https://bugs.freedesktop.org/attachment.cgi?id=119120&action=edit
Xorg configuration used for headless tests

[root at duke ~]# pacman -Q mesa linux xorg-server libdrm
mesa 11.0.3-1
linux 4.2.3-1
xorg-server 1.17.2-4
libdrm 2.4.65-1

I was setting up an Intel NUC to run dolphin-emu.org graphical regression tests
(https://fifoci.dolphin-emu.org/). The setup is simple: "headless" Xorg
(xorg.conf attached) and dolphin-emu running in that DISPLAY rendering tests.

Two of our tests consistently end up segfaulting on Intel GPUs with the
following log:

    intel_do_flush_locked failed: Input/output error

Accompanied by the following in dmesg:

    [  215.432142] [drm] stuck on render ring
    [  215.433001] [drm] GPU HANG: ecode 8:0:0x84df3c1c, in FIFO-GPU thread
[394], reason: Ring hung, action: reset
    [  215.433003] [drm] GPU hangs can indicate a bug anywhere in the entire
gfx stack, including userspace.
    [  215.433004] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
    [  215.433005] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
    [  215.433006] [drm] The gpu crash dump is required to analyze gpu hangs,
so please always attach it.
    [  215.433007] [drm] GPU crash dump saved to /sys/class/drm/card0/error
    [  215.435124] drm/i915: Resetting chip after gpu hang
    [  221.455258] [drm] stuck on render ring
    [  221.456246] [drm] GPU HANG: ecode 8:0:0x84df3c1c, in FIFO-GPU thread
[394], reason: Ring hung, action: reset
    [  221.458382] drm/i915: Resetting chip after gpu hang

The issue happens consistently when running these tests here. Unfortunately an
apitrace does not reproduce the problem, so here are some slightly involved
repro instructions using our software:

    $ git clone https://github.com/dolphin-emu/dolphin
    $ cd dolphin && mkdir build && cd build
    $ cmake -DDISABLE_WX=ON ..
    $ make -j4
    $ rm -rf ~/.dolphin-emu
    $ mkdir -p ~/.dolphin-emu/Config
    $ wget
https://github.com/dolphin-emu/fifoci/blob/master/runner/linux/Config-ogl/Dolphin.ini
-O ~/.dolphin-emu/Config/Dolphin.ini
    $ wget
https://github.com/dolphin-emu/fifoci/blob/master/runner/linux/Config-ogl/gfx_opengl.ini
-O ~/.dolphin-emu/Config/gfx_opengl.ini
    $ wget
https://fifoci.dolphin-emu.org/media/dff/MarioSuperSluggersStarBar.dff
    $ Binaries/dolphin-emu-nogui -e MarioSuperSluggersStarBar.dff  # <-
consistently crashes

I couldn't reproduce the same issue on an Haswell Intel HD chip, but that's
with slightly different software versions too.

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