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<base href="https://bugs.freedesktop.org/">
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<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>
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<th>Summary</th>
<td>GPU hang with i915.enable_psr=1 (Kaby Lake R)
</td>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>not set
</td>
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<th>Priority</th>
<td>not set
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<th>Component</th>
<td>DRM/Intel
</td>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<th>Reporter</th>
<td>raphael.kubo.da.costa@intel.com
</td>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<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>
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