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      <base href="https://bugs.freedesktop.org/">
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [drm] GPU HANG: ecode 9:0:0x859ffffb, in Xorg [2092], reason: hang on rcs0, action: reset"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=106443">106443</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[drm] GPU HANG: ecode 9:0:0x859ffffb, in Xorg [2092], reason: hang on rcs0, action: reset
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>XOrg git
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>x86-64 (AMD64)
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux (All)
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>DRM/Intel
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>simeon.miteff@gmail.com
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=139429" name="attach_139429" title="GPU crash dump">attachment 139429</a> <a href="attachment.cgi?id=139429&action=edit" title="GPU crash dump">[details]</a></span>
GPU crash dump

I get GPU hangs on Sky Lake integrated graphics when not booting with either:

i915.modeset=0 
or
video=vesafb:off

The hardware is a Dell 7040 with Intel i7-6700 CPU.

Xorg does not crash, but everything except the cursor locks up each time the
GPU resets. Here his the drm message:

[   41.823218] [drm] GPU HANG: ecode 9:0:0x859ffffb, in Xorg [2092], reason:
hang on rcs0, action: reset
[   41.823219] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[   41.823220] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[   41.823220] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[   41.823220] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[   41.823221] [drm] GPU crash dump saved to /sys/class/drm/card0/error

Subsequent to this there are frequent repeated resets:

[   92.731613] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[  100.731570] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[  108.731500] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[  116.731410] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[  606.840675] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[  617.816522] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[  625.816467] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0
[  633.816354] i915 0000:00:02.0: Resetting rcs0 for hang on rcs0

Kernel: 4.17.0
Xorg server: 1.19.6
Intel driver: 2.99.917+git20171229-1
Mesa: 18.0.0
GuC firmware: i915/skl_guc_ver9_33.bin
HuC firmware: i915/skl_huc_ver01_07_1398.bin

I started out with a stock Ubuntu Xenial and progressively upgraded bits with
no avail. Turning off modeset/vesafb was an acceptable solution until I needed
dual display support.

GPU crash dump is attached</pre>
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