<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [HSW Regression]igt/kms_flip/vblank-vs-hang causes system hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=86962">86962</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[HSW Regression]igt/kms_flip/vblank-vs-hang causes system hang
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>DRI git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<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>jinxianx.guo@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>
<p>
<div>
<pre>==System Environment==
--------------------------
Regression: Yes.
Good commit on -next-queued:
65fa5f773196ccc88c4aae43ece9119f092c20a6(2014_11_26)
Non-working platforms: HSW
==kernel==
--------------------------
origin/drm-intel-nightly: 2014_12_03(fails)
origin/drm-intel-next-queued:d06cced8fa81d56e56ab34e93a83236b151c2a76(fails)
drm/i915: Move init_unused_rings to gem_init_hw
origin/drm-intel-fixes: b0616c5306b342ceca07044dbc4f917d95c4f825(works)
drm/i915: Unlock panel even when LVDS is disabled
==Bug detailed description==
-----------------------------
igt/kms_flip/vblank-vs-hang causes system hang.
Because system hang, unable to catch dmesg
Output:
[root@x-hsw27 tests]# ./kms_flip --run-subtest vblank-vs-hang
IGT-Version: 1.8-g4e5c16c (x86_64) (Linux:
3.18.0-rc7_drm-intel-nightly_691817_20141202+ x86_64)
Using monotonic timestamps
Beginning vblank-vs-hang on crtc 8, connector 18
1024x768 60 1024 1048 1184 1344 768 771 777 806 0xa 0x40 65000
.............................................................
vblank-vs-hang on crtc 8, connector 18: PASSED
Beginning vblank-vs-hang on crtc 12, connector 18
1024x768 60 1024 1048 1184 1344 768 771 777 806 0xa 0x40 65000
....................................................Test assertion failure
function wait_for_events, file kms_flip.c:1171:
Failed assertion: ret > 0
select timed out or error (ret 0)
Subtest vblank-vs-hang: FAIL (21.814s)
Warning on condition flags != 0 in fucntion check_stop_rings, file
drmtest.c:112
i915_ring_stop flags on exit 0x400000ff, can't quiescent gpu cleanly
Write failed: Broken pipe
==Reproduce steps==
----------------------------
1. ./kms_flip --run-subtest vblank-vs-hang</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
<li>You are on the CC list for the bug.</li>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>