[Bug 86233] [HSW regression] PCH transcoder A FIFO underrun while hot-plug VGA

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86233

--- Comment #4 from Li Xu <li.l.xu at intel.com> ---
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.

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