[Bug 106199] Cannot get back into DM after logoff (Linux 4.16.2+)

https://bugs.freedesktop.org/show_bug.cgi?id=106199

--- Comment #5 from Öyvind Saether oyvinds@everdot.org --- Created attachment 139195 --> https://bugs.freedesktop.org/attachment.cgi?id=139195&action=edit some kind of modern art by amdgpu.dc=1 upon logging out back into lightdm

Tried again on the RX580 box with amdgpu.dc=1. Computer did NOT freeze but display did turn into some modern art project. ssh in shows this in the xorg log [ 748.979] (EE) modeset(0): failed to set mode: Invalid argument [ 749.548] (II) modeset(0): Disabling kernel dirty updates, not required. and nothing in dmesg.

interestingly service lightdm restart did bring it back up normally. logging out again after that produced another pretty artistic ant-hive picture.