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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 - [SKL]igt/kms_cursor_crc sporadically causes system hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89882">89882</a>
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<th>Summary</th>
<td>[SKL]igt/kms_cursor_crc sporadically causes system hang
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>All
</td>
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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>critical
</td>
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<th>Priority</th>
<td>high
</td>
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<th>Component</th>
<td>DRM/Intel
</td>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>huax.lu@intel.com
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=114840" name="attach_114840" title="dmesg">attachment 114840</a> <a href="attachment.cgi?id=114840&action=edit" title="dmesg">[details]</a></span>
dmesg
System Environment:
--------------------------
Regression: not sure
Non-working platforms: SKL
==kernel==
--------------------------
drm-intel-nightly/d72ff1ab1499711c941831400629c14493313b3a
commit d72ff1ab1499711c941831400629c14493313b3a
Author: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
Date: Tue Mar 31 17:30:12 2015 +0200
drm-intel-nightly: 2015y-03m-31d-15h-29m-33s UTC integration manifest
==Bug detailed description==
-----------------------------
Run ./kms_cursor_crc --run-subtest cursor-256x256-onscreen on SKL-Y with
-nightly kernel, it causes system hang at the 2nd round.
output:
IGT-Version: 1.10-g2f0e3cd (x86_64) (Linux:
4.0.0-rc6_drm-intel-nightly_d72ff1_2
Beginning cursor-256x256-onscreen on pipe A, connector eDP-1
............................
cursor-256x256-onscreen on pipe A, connector eDP-1: PASSED
Beginning cursor-256x256-onscreen on pipe B, connector eDP-1
............................
cursor-256x256-onscreen on pipe B, connector eDP-1: PASSED
Beginning cursor-256x256-onscreen on pipe C, connector eDP-1
............................
cursor-256x256-onscreen on pipe C, connector eDP-1: PASSED
Subtest cursor-256x256-onscreen: SUCCESS (29.165s)
real 0m29.859s
user 0m5.726s
sys 0m0.527s
root@x-skly05:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# time
./kms_cursor_crc --run-subtest cursor-256x256-onscreen
IGT-Version: 1.10-g2f0e3cd (x86_64) (Linux:
4.0.0-rc6_drm-intel-nightly_d72ff1_20150401+ x86_64)
Beginning cursor-256x256-onscreen on pipe A, connector eDP-1
.Warning on condition crc->crc[i] == 0xffffffff in fucntion crc_sanity_checks,
file igt_debugfs.c:494
Suspicious CRC: it looks like the CRC read back was from a register in a
powered down well
==Reproduce steps==
----------------------------
1. run ./kms_cursor_crc --run-subtest cursor-256x256-onscreen twice</pre>
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