Description of problem:
When I boot my Thinkpad X200s on the dock with an external display and the lid closed, the BIOS, GRUB and Plymouth messages appear on the external display. The login dialog isn't visible until I open the lid and can then see it there in the wrong place. CTRL-ALT-F2 also flips to a text console on the external display correctly.
This exact same bug is also reported for GDM as well, I was trying lightdm as a workaround to it as well as general GNOME removal. So is this an X bug of some sort? No idea where this really needs to be filed but I guess it can be ignored here as good as anywhere else. The gdm bug has been there for a couple of releases.
Version-Release number of selected component (if applicable):
I can confirm this for lightdm-1.8.5-2.fc20.x86_64. I think it is worth trying to contact upstream. Short look at https://bugs.launchpad.net/lightdm/ didn't expose any action on this, so I go report this stuff there.
Reported to upstream https://bugs.launchpad.net/lightdm/+bug/1273913
Reported here https://bugs.launchpad.net/lightdm-gtk-greeter/+bug/1273922 as first report was in a wrong place...
For now you might try installing lightdm-razorqt and set "greeter-session=lightdm-razor-greeter" option in /etc/lightdm/lightdm.conf
. For me it works better.
This is not only issue for physical DP connections, but also for setups where the DP is "wired internally". E.g. in Ultra Docks for X40 ThinkPads, there is DP hub transforming the signal to HDMI, VGA and DVI. So I am affected by this issue regardless the port I use for external monitor connection.
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