When I shutdown or reboot my Ubuntu 12.04 it doesn't ever finish shutting down.
I end up stuck on a black/blank screen and have to hold the power button to shut it down.
Does anyone know where I can begin debugging this issue?
Thanks in advance
12.04rebootshutdown
When I shutdown or reboot my Ubuntu 12.04 it doesn't ever finish shutting down.
I end up stuck on a black/blank screen and have to hold the power button to shut it down.
Does anyone know where I can begin debugging this issue?
Thanks in advance
Best Answer
By default, the latest ubuntu install (12.04.2, and few others behind) hides messages and shows a nice animated image (splash) in a fancy resolution.
To make sure to view the console and possibly see what's hanging behind that dark screen:
/etc/default/grub (edit & save):
Now update grub boot entries with these new defaults:
And at your next start/shutdown process, you should see message lines with
[ OK ]
or[ ERROR ]
or something wrong following it's title:nomodeset: You usually can toggle between the splash screen and the console messages with
Esc
key, but some video cards or lack of drivers can't handle the mode/capacities the boot process is using.nomodeset
ensures it's using basic common capacities and makes sure you see messages (provided you don't press ALT-F1 to F7 during boot/shutdown to view other terminals than the one used for services startup/shutdown).Edit: You can also try without nomodeset if you run into troubles starting X.
GRUB_CMDLINE_LINUX_DEFAULT=""