[Bug 63451] DP lost output after switching the terminal sometimes on Ivybridge plaform

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=63451

--- Comment #2 from XiongZhang <xiong.y.zhang at intel.com> ---
(In reply to comment #1)
> Just to check: When you the DP signal is lost, is there anything in the
> dmesg debug output about it? I somewhat expected a link training issue, but
> in the attached dmesg there's nothing ...

Yes, when dp lost display, there isn't error mesg in dmesg. Once setting dp
from 1024 X 768 to 1920 X 1200 at 151.091982 in dmesg, then dp output nothing.

>Also, if DP signal is lost, does
> it restore in a few seconds? If not, does unplugging and replugging the DP
> cable fix things?
it will not restore in a few seconds. 
But unplugging and replugging the DP cable can restore it.

thanks

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