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<body><span class="vcard"><a class="email" href="mailto:bingx.a.yan@intel.com" title="yanbing <bingx.a.yan@intel.com>"> <span class="fn">yanbing</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [ILK,IVB]kms_flip error: inter-flip ts jitter"
href="https://bugs.freedesktop.org/show_bug.cgi?id=59999">bug 59999</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>NEEDINFO
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<td>NEW
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [ILK,IVB]kms_flip error: inter-flip ts jitter"
href="https://bugs.freedesktop.org/show_bug.cgi?id=59999#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [ILK,IVB]kms_flip error: inter-flip ts jitter"
href="https://bugs.freedesktop.org/show_bug.cgi?id=59999">bug 59999</a>
from <span class="vcard"><a class="email" href="mailto:bingx.a.yan@intel.com" title="yanbing <bingx.a.yan@intel.com>"> <span class="fn">yanbing</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=59999#c2">comment #2</a>)
<span class="quote">> Hm, we seem to miss exactly a frame ...
>
> A few questions:
> - How reproducible is this? I'm running some of the mentioned tests in an
> endless loop on my ilk yet, it seems solid.
> - Does booting with drm_kms_helper.poll=0 help?
> - Does this only happen on specific ilk/ivb machines (e.g. specific monitors
> connected) or on all of them? What about snb?
> - On a quick lock the ivb machine has only VGA connected. Does the issue
> also happen on when other outputs instead of VGA are connected, maybe with
> different screens ...</span >
1. The reproducing steps just as "./kms_flip --run-subtest
flip-vs-absolute-wf_vblank" and it will be always fail on my ilk.
2.I had add drm_kms_helper.poll=0 in grub.cfg,but it doesn't help by booting
with it,those subcases still fail on ilk.
3.Yes，we had 4 ilk machines,but only 1 of them had this bug,others on these
subcases are all pass. And as same as ilk,only 1 of ivb machines had this bug,
not all of ilk & ivb.
4.Snb doesn't had this bug.
***5.On the ivb,I was testing these subcase by 3 monitors connecting at the
same time.(VGA & DP & HDMI).Now I retested one time by connectting only 1
monitor.I found you are right,when I connected with VGA,these fail,and all pass
except by connecting with VGA.
6.On the ilk,it's a desktop notebook and doesn't connect by none of extranal
monitor.</pre>
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