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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [PNV]igt/kms_flip/modeset-vs-vblank-race-interruptible sporadically fails"
href="https://bugs.freedesktop.org/show_bug.cgi?id=88136">88136</a>
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<tr>
<th>Summary</th>
<td>[PNV]igt/kms_flip/modeset-vs-vblank-race-interruptible sporadically fails
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
</tr>
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<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>huax.lu@intel.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<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=111884" name="attach_111884" title="dmesg">attachment 111884</a> <a href="attachment.cgi?id=111884&action=edit" title="dmesg">[details]</a></span>
dmesg
==System Environment==
--------------------------
Regression: not sure
Non-working platforms: PNV
==kernel==
--------------------------
drm-intel-nightly/a719ac1cbb45e1af3f79a4e112cefef8bf47378e
commit a719ac1cbb45e1af3f79a4e112cefef8bf47378e
Author: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
Date: Tue Jan 6 09:09:24 2015 +0100
drm-intel-nightly: 2015y-01m-06d-08h-08m-51s UTC integration manifest
==Bug detailed description==
-----------------------------
It sporadically fails on PNV with -nightly kernel, fail rate:1/5.
kms_flip/dpms-vs-vblank-race-interruptible also sporadically fails.
output:
IGT-Version: 1.9-gc49a7e9 (i686) (Linux:
3.19.0-rc2_drm-intel-nightly_a719ac_20150107+ i686)
Using monotonic timestamps
Beginning modeset-vs-vblank-race-interruptible on crtc 21, connector 22
1024x600 60 1024 1072 1104 1200 600 603 609 625 0xa 0x48 45000
.......
modeset-vs-vblank-race-interruptible on crtc 21, connector 22: PASSED
Beginning modeset-vs-vblank-race-interruptible on crtc 18, connector 28
1024x768 60 1024 1048 1184 1344 768 771 777 806 0xa 0x40 65000
......................................................
modeset-vs-vblank-race-interruptible on crtc 18, connector 28: PASSED
Beginning modeset-vs-vblank-race-interruptible on crtc 21, connector 28
1024x768 60 1024 1048 1184 1344 768 771 777 806 0xa 0x40 65000
....................................................Test assertion failure
function run_test_step, file kms_flip.c:962:
Failed assertion: end - start > 0.9 * frame_time(o) && end - start < 2.1 *
frame_time(o)
Last errno: 4, Interrupted system call
wait for two vblanks took 686 usec (frame time 16666.666667 usec)
Subtest modeset-vs-vblank-race-interruptible: FAIL (11.020s)
==Reproduce steps==
----------------------------
1. ./kms_flip --run-subtest modeset-vs-vblank-race-interruptible</pre>
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