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Ubuntu 17.10 "Artful Aardvark" upgrade troubleshooting

NB: beware of this bug!

Bug: gdm can't unlock desktop (after suspending, to switch users, etc)

Symptoms: lock screen takes very long (ie, a few seconds) to process username+password, returns “authentication error”, and becomes impossible to log in and unlock the screen again, with any user.

Also, /var/log/syslog shows:

Failed to add watch on /run/systemd/ask-password: No space left on device

Solution: see and follow link in answer #2: This worked for me.

Annoyance: Gnome's top bar takes too much real state

Solution: install gnome-shell and gnome-shell-extension-autohidetopbar (may have dependencies), then configure running gnome-shell-extension-prefs.

Workrave doesn't work


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