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<body><span class="vcard"><a class="email" href="mailto:bugs@mblankhorst.nl" title="Maarten Lankhorst <bugs@mblankhorst.nl>"> <span class="fn">Maarten Lankhorst</span></a>
</span> changed
<a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [BAT][PNV] pipe [AB] vblank wait timed out when running igt@kms_pipe_crc_basic@hang-read-crc-pipe-a/b"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101597">bug 101597</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Assignee</td>
<td>intel-gfx-bugs@lists.freedesktop.org
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<td>bugs@mblankhorst.nl
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<td style="text-align:right;">Status</td>
<td>NEW
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<td>ASSIGNED
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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [BAT][PNV] pipe [AB] vblank wait timed out when running igt@kms_pipe_crc_basic@hang-read-crc-pipe-a/b"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101597#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - [BAT][PNV] pipe [AB] vblank wait timed out when running igt@kms_pipe_crc_basic@hang-read-crc-pipe-a/b"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101597">bug 101597</a>
from <span class="vcard"><a class="email" href="mailto:bugs@mblankhorst.nl" title="Maarten Lankhorst <bugs@mblankhorst.nl>"> <span class="fn">Maarten Lankhorst</span></a>
</span></b>
<pre>This bug only affects fi-pnv-d510, the one in farm 2 is unaffected.
I'm not sure when this was broken or if it was always broken, but the code
needs to disable CXSR during atomic modeset enable. When cxsr is active you get
no vblanks, which means you end up with this.
It will be fixed when converting the gen4- watermarks to atomic, the code
properly disables cxsr there. I've tested this bug and on nightly I hit it all
the time, while with atomic watermarks it's gone.</pre>
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