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    <head>
      <base href="https://bugs.freedesktop.org/">
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - NON-GuC constant i915 0000:00:02.0: GPU HANG: ecode 9:1:0x00000000, hang on rcs0"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=111920">111920</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>NON-GuC constant i915 0000:00:02.0: GPU HANG: ecode 9:1:0x00000000, hang on rcs0
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>DRI 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>major
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>high
          </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>kenny@panix.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>

        <tr>
          <th>i915 platform</th>
          <td>CFL
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=145678" name="attach_145678" title="/sys/class/drm/card0/error">attachment 145678</a> <a href="attachment.cgi?id=145678&action=edit" title="/sys/class/drm/card0/error">[details]</a></span>
/sys/class/drm/card0/error

In <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED WORKSFORME - [CI][SHARDS] igt@gem_userptr_blits@readonly-unsync - fail - WARNING: CPU: 2 PID: 1202 at mm/filemap.c:220 unaccount_page_cache_page"
   href="show_bug.cgi?id=111085">bug 111085</a> (<a class="bz_bug_link 
          bz_status_NEEDINFO "
   title="NEEDINFO - Constant "Resetting rcs0 for hang on rcs0" and machine lockup"
   href="show_bug.cgi?id=111805">https://bugs.freedesktop.org/show_bug.cgi?id=111805</a>)
<a href="mailto:lakshminarayana.vudum@intel.com">lakshminarayana.vudum@intel.com</a> asked me to try running without the GuC
enabled. 

I did that, and it's still hanging up. This is the DRM-tip right before commit
c1132367 as that commit prevents my box from going into S0/s2idle suspend (see
bug <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - commit c1132367 "Extract GT render sleep (rc6) management" prevents entering s2idle"
   href="show_bug.cgi?id=111909">https://bugs.freedesktop.org/show_bug.cgi?id=111909</a>).

Here's the worst part- if I can wrench control to a VT, I can usually "sudo
systemctl hibernate" to force a power-cycle that unwedges the i915- but THIS
time, right after the resume:

----
Oct  7 17:03:36 hp-x360n systemd-sleep[16719]: System resumed.
Oct  7 17:03:36 hp-x360n systemd[1]: Stopping TLP suspend/resume...
Oct  7 17:03:36 hp-x360n systemd[1]: Stopped TLP suspend/resume.
Oct  7 17:04:40 hp-x360n kernel: [20868.899672] i915 0000:00:02.0: Resetting
rcs0 for hang on rcs0
Oct  7 17:05:16 hp-x360n kernel: [20904.931581] i915 0000:00:02.0: Resetting
rcs0 for hang on rcs0
Oct  7 17:07:04 hp-x360n kernel: [21012.899361] i915 0000:00:02.0: Resetting
rcs0 for hang on rcs0
----

<facepalm>

The latest i915 changes on Sept 26th are really killing my workflow, as I can
never tell when my laptop will just decide to hang up (and I can be doing such
mundane tasks as viewing a webpage or building some software in a konsole- I
don't game and this time I wasn't even watching video).

Is there ANYTHING I can do to help you guys diagnose, mitigate, or warn me when
it's likely to occur? I've posted some 7 .../card0/error files and apparently
there's not enough info in these to help figure out what's going on. Are there
any debug flags (that won't ruin daily-driver performance) that I can try so
when this happens again there's more info?

(Is there any way to just hack out a merge from a GIT tree?)</pre>
        </div>
      </p>


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