Ubuntu
gnome-flashback package

  1. Bug #1665853
  2. Comment #5

Comment 5 for bug 1665853

Revision history for this message
Alberts Muktupāvels (muktupavels) wrote : Re: Gnome Flashback: Could not assign CRTC to outputs, ignoring configuration

This definitely is not problem with gnome-flashback, at login screen gnome-flashback is not started.

Don't know if that will work for you, but once it worked for me. You could try to copy your working /home/{your-user}/.config/monitors.xml file to /var/lib/lightdm/.config/monitors.xml. If that does not help remember to delete it from /var/lib/lightdm/.config

Other option might be to create /etc/X11/xorg.conf with correct configuration. Or if you already have one then maybe try to temporarily remove it.

Since you say that happens after updating to xorg/xserver-hwe-16.04 that could indicate that this is bug/regression in xorg.