How to solve "Could not update .ICEauthority file /var/lib/gdm/.ICEauthority"?
1. Boot into "Recovery Mode".
2. Input the root password for maintenance mode.
3. Go to the /var/lib/gdm folder (cd /var/lib/gdm).
4. Remove the .ICEauthority file (rm .ICEauthority).
5. Finally, reboot your computer.
root@root:/var/lib/gdm3# rm .ICEauthority
ReplyDeleterm: can not delete «.ICEauthority»: no such file or directory
root@omixam:/var/lib/gdm3#