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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [HSW regression] PCH transcoder A FIFO underrun while hot-plug VGA"
href="https://bugs.freedesktop.org/show_bug.cgi?id=86233#c4">Comment # 4</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [HSW regression] PCH transcoder A FIFO underrun while hot-plug VGA"
href="https://bugs.freedesktop.org/show_bug.cgi?id=86233">bug 86233</a>
from <span class="vcard"><a class="email" href="mailto:li.l.xu@intel.com" title="Li Xu <li.l.xu@intel.com>"> <span class="fn">Li Xu</span></a>
</span></b>
<pre>We have split the error by time:
About 2014-03-05:
*ERROR* PCH transcoder A FIFO underrun & *ERROR* CPU pipe B FIFO underrun
occures ;
Call trace ;
and screen can light up.
About 2014-03-04 ~ 02-13:
screen can't light up at all;
About 2014-02-12 ~2014-02-11:
and *ERROR* PCH transcoder A FIFO underrun & *ERROR* CPU pipe B FIFO underrun
occures ;
Call trace ;
and screen can light up.
2014-02-10:
Call trace;
screen can light up
So we try to bisect with a good point 02-10 and a bad point 02-11/02-12 for the
two errors:
*ERROR* PCH transcoder A FIFO underrun & *ERROR* CPU pipe B FIFO underrun
occures .
But we can't find the exact bad commit, maybe caused by git rebase or others.So
bisecting seems to be impossible.</pre>
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