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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 - GPU hang with i915.enable_psr=1 (Kaby Lake R)"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=112159">112159</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>GPU hang with i915.enable_psr=1 (Kaby Lake R)
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

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

        <tr>
          <th>OS</th>
          <td>All
          </td>
        </tr>

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

        <tr>
          <th>Severity</th>
          <td>not set
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>not set
          </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>raphael.kubo.da.costa@intel.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=145835" name="attach_145835" title="dmesg with drm.debug=0x1e log_buf_len=1M">attachment 145835</a> <a href="attachment.cgi?id=145835&action=edit" title="dmesg with drm.debug=0x1e log_buf_len=1M">[details]</a></span>
dmesg with drm.debug=0x1e log_buf_len=1M

I'm running Fedora with kernel 5.3.7, and have been experiencing this issue for
several months. Essentially, if I boot my laptop _without_ plugging it to an
external display (via an HDMI port, for example), then it is almost 100%
certain that it is either going to hang while waiting for my LUKS password,
during the boot process or if I later switch to a non-X11/Wayland VT. The
entire machine hangs, and I need to manually power it off and then turn it on
again. This machine is a Dell Latitude 7390 with an i7-8650U processor.

I played with a few boot parameters today, and noticed that any of the
following seem to stop the problem from happening:
* intel_idle.max_cstate=1
* i915.enable_dc=0
* i915.enable_psr=0
* i915.dmc_firmware_path=""
* nomodeset i915.modeset=0

I'm attaching dmesg from a kernel-debug run with drm.debug=0x1e and
log_buf_len=1M that did not hang, but has two WARN_ONs there. I also have a few
other saved dmesgs, but they were produced without booting with drm.debug=0x1e
and log_buf_len=1M.</pre>
        </div>
      </p>


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