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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 - nouveau graphics freeze when using KDE Plasma 5 with "fifo: PBDMA0: 00200000 subc 0 mthd 000c data 00000000""
href="https://bugs.freedesktop.org/show_bug.cgi?id=98525">98525</a>
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<th>Summary</th>
<td>nouveau graphics freeze when using KDE Plasma 5 with "fifo: PBDMA0: 00200000 subc 0 mthd 000c data 00000000"
</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>x86-64 (AMD64)
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
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<tr>
<th>Severity</th>
<td>normal
</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>matthias.h.nagel@gmail.com
</td>
</tr>
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<th>QA Contact</th>
<td>xorg-team@lists.x.org
</td>
</tr></table>
<p>
<div>
<pre>Kernel version: 4.4.26
Graphic card: "ASUS GeForce GTX 660 PCI 3.0 2GB DDR5"
uname: "Linux 4.4.26-gentoo #1 SMP Mon Oct 31 17:05:30 CET 2016 x86_64 Intel(R)
Xeon(R) CPU E3-1230 v3 @ 3.30GHz GenuineIntel GNU/Linux
SW versions:
x11-base/xorg-drivers-1.18-r1
x11-base/xorg-server-1.18.4
x11-base/xorg-x11-7.4-r2
kde-plasma/kwin-5.7.5
The system freezes, the X screen gets locked, mouse can still be moved,
switching VT console is not possible, three-finger-salute does not work, no
keyboard login possible Login via SSH and reboot still possible.
The bug is usually triggered if huge parts of the display needs rapid updates,
e.g. compiling a piece of software in a X terminal in full screen mode.
I use the proprietary PGRAPH firmware due to bugs <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [NVE6] GPU lockups"
href="show_bug.cgi?id=69882">#69882</a>, <a class="bz_bug_link
bz_status_NEW "
title="NEW - [NVE6] complete system freeze, PGRAPH engine fault on channel 2, SCHED_ERROR [ CTXSW_TIMEOUT ]"
href="show_bug.cgi?id=93629">#93629</a>, <a class="bz_bug_link
bz_status_NEW "
title="NEW - [NVE6] disrupted display, cannot switch VT, everything else still works, E[ PDISP] link training failed"
href="show_bug.cgi?id=93630">#93630</a> and
#95054.
Kernel message:
nouveau 0000:01:00.0: fifo: PBDMA0: 00200000 [METHOD] ch 12 [023f28f000
Compositor[2492]] subc 0 mthd 000c data 00000000
This message floods the logs until they are overwritten from the beginning. The
other message is "Missed NN kernel messages".</pre>
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</p>
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