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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [regression][NV4c] System hang while loading gdm on 3.7 kernel (works on 3.6)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=61321">61321</a>
</td>
</tr>
<tr>
<th>Keywords</th>
<td>regression
</td>
</tr>
<tr>
<th>Assignee</th>
<td>nouveau@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[regression][NV4c] System hang while loading gdm on 3.7 kernel (works on 3.6)
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>xorg-team@lists.x.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>major
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<th>Reporter</th>
<td>cesarb@cesarb.net
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Component</th>
<td>Driver/nouveau
</td>
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<th>Product</th>
<td>xorg
</td>
</tr></table>
<p>
<div>
<pre>Since upgrading from a 3.6.10 kernel to a 3.7.9 kernel (Fedora 18), the system
started hanging while loading gdm. Going back to the 3.6 kernel works, going to
a 3.8 kernel hangs the same way.
The hang manifests first as the gdm spinning "loading" cursor stopping,
followed a few seconds later by a screen full of a repeated noise pattern
(different for each boot, but looks like a small block of noise tiled all over
the screen). The machine does not answer to the keyboard (num lock/caps lock
LEDs) or the network (by this point NetworkManager already started the
interface, so I can get a few pings before it hangs).
In particular, it is not the initial modeset when loading the module which
hangs; it is only gdm. If I boot with systemd.unit=multi-user.target, I can
boot without any hangs, load netconsole, and isolate graphical.target to load
gdm to see it hang. I used that to capture the kernel messages until the hang
for the Fedora 3.7.9 kernel.
I also managed to capture the Xorg.0.log for the attempt with the 3.8 kernel
(booting directly into graphical.target).
The relevant version numbers are:
kernel-3.6.10-4.fc18.x86_64 (works)
kernel-3.7.9-201.fc18.x86_64 (hangs)
Upstream 3.8 kernel with a Fedora config (hangs)
xorg-x11-server-Xorg-1.13.2-2.fc18.x86_64
xorg-x11-drv-nouveau-1.0.6-1.fc18.x86_64
libdrm-2.4.42-1.fc18.x86_64
mesa-dri-drivers-9.0.1-4.fc18.x86_64
I also attempted once booting 3.7.9 with nouveau.config=NvPCIE=0 as suggested
at <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - DRM NOUVEAU: cannot boot with kernel >=3.7"
href="show_bug.cgi?id=58776">bug #58776</a>; it did not make any visible difference.</pre>
</div>
</p>
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