<html>
<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 - [regression][bisected] Mutex deadlock in nouveau (nv50_display.c)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=106456">106456</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[regression][bisected] Mutex deadlock in nouveau (nv50_display.c)
</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>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/other
</td>
</tr>
<tr>
<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>john@jlindgren.net
</td>
</tr></table>
<p>
<div>
<pre>Since linux 4.14, the nouveau driver deadlocks at boot.
Downstream report:
<a href="https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1763189?comments=all">https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1763189?comments=all</a>
The culprit is this commit:
<a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=af2405af07d168e2905f2ac9494d3a804a549f0f">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=af2405af07d168e2905f2ac9494d3a804a549f0f</a>
In short, drm_fb_helper_add_one_connector() and
drm_fb_helper_remove_one_connector() were incompatibly changed to add locking
of a mutex that previously the caller was expected to lock. The i915 and
radeon drivers were updated to no longer lock the mutex, but nouveau was not
updated.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>