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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Priority</th>
<td>high
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BYT Regression]igt/kms_flip some subcases cause system hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=81662">81662</a>
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BYT Regression]igt/kms_flip some subcases cause system hang
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jinxianx.guo@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>==System Environment==
--------------------------
Regression: Yes
Good commit on drm-next: ca5a1b9ba0fb5291b555a23b76dbe5f6c30bfd7a
Non-working platforms: BYT
==kernel==
--------------------------
origin/drm-intel-nightly: d62845db2ec40e15a76e5d5ebfe1a039ea2538c4(fails)
drm-intel-nightly: 2014y-07m-22d-17h-58m-03s integration manifest
origin/drm-intel-next-queued: 1dd7389e898de2b7ceb90054fd96e4c3329b77ef(Another
failed <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [IVB/SNB/HSW Regression]igt/kms_flip some subcases fail"
href="show_bug.cgi?id=81367">Bug 81367</a>)
drm/i915: Replace HAS_PCH_SPLIT which incorrectly lets some platforms in
origin/drm-intel-fixes: a0d036b074b4a5a933e37fcb9bdd6b3cc80a0387(Another failed
<a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [IVB/SNB/HSW Regression]igt/kms_flip some subcases fail"
href="show_bug.cgi?id=81367">Bug 81367</a>)
drm/i915: Reorder the semaphore deadlock check, again
origin/drm-fixes: ec8a362f2e6e380e7a1f66a6c9a7f6c237ab3520(Another failed <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [IVB/SNB/HSW Regression]igt/kms_flip some subcases fail"
href="show_bug.cgi?id=81367">Bug
81367</a>)
Merge branch 'drm-fixes-3.16' of git://people.freedesktop.org/~agd5f/linux
into drm-fixes
origin/drm-next: 7296c849bf2eca2bd7d34a4686a53e3089150ac1(fails)
drm/i915: fix build without fbdev.
==Bug detailed description==
-----------------------------
igt/kms_flip some subcases cause system hang
Because system hang, unable to get dmesg.
Output:
root@x-byt06:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# time ./kms_flip
--run-subtest 2x-absolute-wf_vblank
IGT-Version: 1.7-g4d4f4b2 (x86_64) (Linux:
3.16.0-rc6_drm-intel-nightly_d62845_20140723+ x86_64)
Using monotonic timestamps
Beginning 2x-absolute-wf_vblank on crtc 7:12, connector 27:15
1920x1080 60 1920 1966 1996 2080 1080 1082 1086 1112 0xa 0x48 138780
1920x1080 60 1920 1966 1996 2080 1080 1082 1086 1112 0xa 0x48 138780
.....................................................................................................................................................................................
2x-absolute-wf_vblank on crtc 7:12, connector 27:15: PASSED
Subtest 2x-absolute-wf_vblank: SUCCESS
Write failed: Broken pipe
Reproduce steps:
-------------------------
1. ./kms_flip --run-subtest 2x-absolute-wf_vblank</pre>
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