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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 - i915 4.11.0-rc1 circular locking dependency detected, switcheroo-cont/776 is trying to acquire lock"
href="https://bugs.freedesktop.org/show_bug.cgi?id=100143">100143</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>i915 4.11.0-rc1 circular locking dependency detected, switcheroo-cont/776 is trying to acquire lock
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
</tr>
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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>
</tr>
<tr>
<th>Reporter</th>
<td>bugzilla@colorremedies.com
</td>
</tr>
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<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>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=130151" name="attach_130151" title="journal konly 4.11.0-rc1+debug drm.debug=0x1e">attachment 130151</a> <a href="attachment.cgi?id=130151&action=edit" title="journal konly 4.11.0-rc1+debug drm.debug=0x1e">[details]</a></span>
journal konly 4.11.0-rc1+debug drm.debug=0x1e
During boot, an INFO message pops up shortly after switcheroo-control.service
is started.
BOOT_IMAGE=/vmlinuz-4.11.0-0.rc1.git0.1.fc26.x86_64+debug
root=UUID=15910530-9840-49af-b948-34eb9599442e ro rootflags=subvol=root00
elevator=deadline drm.debug=0x1e enforcing=0
[ 7.670365] localhost.localdomain kernel: snd_hda_intel 0000:01:00.1:
Disabling via vga_switcheroo
[ 7.673522] localhost.localdomain kernel:
[ 7.673522] localhost.localdomain kernel:
======================================================
[ 7.673523] localhost.localdomain kernel: [ INFO: possible circular locking
dependency detected ]
[ 7.673524] localhost.localdomain kernel:
4.11.0-0.rc1.git0.1.fc26.x86_64+debug #1 Not tainted
[ 7.673525] localhost.localdomain kernel:
-------------------------------------------------------
[ 7.673525] localhost.localdomain kernel: switcheroo-cont/776 is trying to
acquire lock:
[ 7.673526] localhost.localdomain kernel: (console_lock){+.+.+.}, at:
[<ffffffffba631389>] vga_switchto_stage2+0x99/0x130
[ 7.673532] localhost.localdomain kernel:
but task is already holding lock:
[ 7.673532] localhost.localdomain kernel: (vgasr_mutex){+.+.+.}, at:
[<ffffffffba631a4a>] vga_switcheroo_debugfs_write+0x8a/0x3f0
[ 7.673535] localhost.localdomain kernel:
which lock already depends on the
new lock.</pre>
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