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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 lock ups when starting GDM, SDDM, and Plasma Desktop"
href="https://bugs.freedesktop.org/show_bug.cgi?id=98631">98631</a>
</td>
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<th>Summary</th>
<td>GPU lock ups when starting GDM, SDDM, and Plasma Desktop
</td>
</tr>
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<th>Product</th>
<td>xorg
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PowerPC
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>blocker
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>Driver/nouveau
</td>
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<th>Assignee</th>
<td>nouveau@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>jeffbai@aosc.xyz
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>xorg-team@lists.x.org
</td>
</tr></table>
<p>
<div>
<pre>Here on a PowerMac G5 with a NVIDIA GeForce 6600LE graphics card, most things
run pretty well except for some of the things I wanted to run on the machine
resulted in nouveau GPU lock-ups, and consequently a glitched display
(artifacts only).
When trying to start GDM, SDDM, or Plasma Desktop on the machine, the display
locks up, and I was able to salvage an error message as follows:
[drm] nouveau 0000:0a:00.0: GPU lockup - switching to software fbcon
After a minute or two, the display responds again, but only showing a black
background with several randomly colored pixels, and some white blocks.
However, this graphics card runs LightDM, XFCE, MATE... and most other
applications without such error and lock-ups. I was able to workaround the
issue by using the nouveau.noaccel=1 kernel parameter (except in the case of
GDM, it returned with the same error), but that simply beats the purpose of
owning a graphics card.
However, even with the noaccel parameter in place, I was still experiencing bad
coloring issues, as reported here:
<a class="bz_bug_link
bz_status_NEW "
title="NEW - Bad color and glitches on PPC64"
href="show_bug.cgi?id=98630">https://bugs.freedesktop.org/show_bug.cgi?id=98630</a>.
----------
Some version info:
- Linux Kernel 4.8.6 (with 4K paging in case you are wondering)
- Mesa 13.0.0
- Xorg Server 1.18.4
----------
P.S.
I tried on with a Quadro FX4500, which simply shows the lock up error whenever
attempting to start X. But I couldn't make sure if it's a hardware issue or
not, as the card sparked on the first power up, that's why I have already
returned it...</pre>
</div>
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