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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 - DRM/Radeon driver not resilient to poor monitor connections"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103913">103913</a>
</td>
</tr>
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<th>Summary</th>
<td>DRM/Radeon driver not resilient to poor monitor connections
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>XOrg git
</td>
</tr>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>DRM/Radeon
</td>
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
</td>
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<th>Reporter</th>
<td>roger@beardandsandals.co.uk
</td>
</tr></table>
<p>
<div>
<pre>Disconnecting and reconnecting HDMI/DVI connectors, or a loose connection, can
cause the driver to stall in a loop with the following messages being logged
approximately every 500ms in syslog.
Nov 25 16:13:30 dragon kernel: [363196.855813] radeon 0000:02:00.0: ring 0
stalled for more than 1710608msec
Nov 25 16:13:30 dragon kernel: [363196.855818] radeon 0000:02:00.0: GPU lockup
(current fence id 0x0000000000284cb5 last fence id 0x0000000000284cb6 on ring
0)
This causes the screen to blank. A reboot is required to clear this.
It would seem more sensible to reset the driver if it has been locked on the
same fence for a long time.
=====================================================================
(II) Module radeon: vendor="X.Org Foundation" [ 82.693] compiled
for 1.19.3, module version = 7.10.0 [ 82.693] Module class: X.Org
Video Driver [ 82.693] ABI class: X.Org Video Driver,
version 23.0 [ 82.693] (II)
roger@dragon:/var/log$ sudo lshw -c video
*-display
description: VGA compatible controller
product: RV770 [Radeon HD 4850]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:02:00.0
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
configuration: driver=radeon latency=0
resources: irq:26 memory:d0000000-dfffffff memory:fbae0000-fbaeffff
ioport:b000(size=256) memory:c0000-dffff
Roger</pre>
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