I can't even get into the login screen when the DisplayPort device is attached. But I disconnected that, got to gdm login via the VGA device, then switched to Ubuntu on Wayland. Ubuntu on Wayland works fine for me generally, but I get the same behavior when connecting the DisplayPort device after logging in. I've included a video of the behavior here: https://photos.app.goo.gl/aJSx5stMMg7QZULH6
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1802573 Title: Thinkpad x220 - Unable to use 2560x1440 external display connected via DisplayPort due flashing black screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1802573/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
