Ubuntu – How to make suspend work without the screen staying black afterwards

14.04backlighthibernatesuspend

I recently installed Ubuntu 14.04 on my laptop, and whenever I try to resume my computer after suspending it, everything starts up fine except my screen, which remains black (no backlight). My laptop even responds to keyboard presses and mouse clicks as if it's awake, I just can't see anything.

I tried using this command to suspend:

sudo pm-suspend --quirk-dpms-on

When I did that, my laptop was able to resume successfully, screen included, if that helps.

Best Answer

This is actually a simple one:

Add pm-suspend --quirk-dpms-on to the /var/cache/pm-utils/last_known_working.quirkdb file.

Reboot and it should work flawlessly.

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