View Full Version : [SOLVED] Laptop upgraded to 14.04, blank screen on wake up from hibernation

April 22nd, 2014, 04:01 PM
I have an eeePC 901 laptop that ran xubuntu 13.10 great. I enabled hibernation and everything worked fine. Yesterday I upgraded to 14.04, and now when the laptop wakes up from hibernation I get a graphical unlock screen that prompts me to enter my password. I enter my password, and the screen goes black. Utterly black as if it's powered off.

I've re-enabled hibernation in polkit:

# cat localauthority/10-vendor.d/com.ubuntu.desktop.pkla

[Re-enable hibernate by default in upower]

[Re-enable hibernate by default in logind]

And changed systemd to either ignore or hibernate on lid switch; both hibernate the machine but neither wakes it up properly.

If I close the lid while the screen is black the laptop will hibernate correctly, but again, will go to a black powered down screen once I enter my password in the unlock screen.

I can ssh into the laptop with no problems. Everything works, no errors in the log files, but nothing on the screen.

This seems to be a fairly common problem with 14.04 but the solutions so far don't work for me. This could be an issue with xubuntu lock screen or lightdm or a backlight driver....


eeepc 901

April 22nd, 2014, 04:54 PM
HAH! xubuntu has changed to "light locker" for display management. I turned it off completely and all is well.

April 25th, 2014, 03:01 PM
I'm having the same problem on an Acer Aspire V5-171. How did you turn off light locker and what other features does that effect?

April 26th, 2014, 02:03 AM
Ah, found it in the Settings Manager. I too had no problems once it was disabled. However that means that my screen does not lock on sleep, which is not acceptable to me.