Ubuntu 16.04 locks up when screen turns off
98413
Keyboard stops working on Ubuntu 16.04 (Xenial Xerus)
16309
Ubuntu 18.10: Screen lock options grayed out
67010
Ubuntu MATE freeze on logout/shutdown/reboot when running on Intel graphics card
151480
Nearby electronic devices turn off laptop's display
21768
How to turn off screen rotation in Ubuntu 18.04 LTS?
96538
Ubuntu 16.04.1 doesn't shutdown/reboot
150811
Ubuntu 16.04 freezes on login screen, no keyboard or mouse working
98471
Prevent monitor from losing signal after screen saver / lock activates
106145
Double lock screen Ubuntu 14.04
105031
Screen flickering on Ubuntu 16.04 LTS
48449
Black screen after Hibernation
2653
What should I do when Ubuntu freezes?
101419
Is there any way to make a hotkey turn the screen off?
7718
How do I disable the screensaver/lock?
46656
How do I prevent the blank screensaver when using keyboard shortcut to lock the computer?
51315
How to turn off the display via the command line?
11497
How can I tell Ubuntu to do nothing when I close my laptop lid?