[Bug 80532] [BYT] internal display unusable if second display is connected, port not ready error

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80532

fcbug at arcor.de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |ASSIGNED

--- Comment #13 from fcbug at arcor.de ---
See attached dmesg with kernel 3.18.6, please.

I booted with no external monitor connected.
The internal display was black and I could not switch to a tty.

I used ssh to connect and did the first dmesg. This one ends with:
[  261.949574] SELinux: initialized (dev tmpfs, type tmpfs), uses transition
SIDs

Then I connected the external monitor and did the second dmesg. This ends with:
[  415.478230] [drm:valleyview_update_wm] Setting FIFO watermarks - A:
plane=111, cursor=6, B: plane=109, cursor=2, SR: plane=0, cursor=0

Last I logged in an did the third dmesg (see attachment, which contains all
messages).


If I boot with the second monitor connected, the internal monitor goes to black
after "fb: switching to inteldrmfb from EFI VGA".
The external monitor is on and later I can login (blindly), which switches the
internal monitor on.

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