Since last week shutdown has stopped working in my system. Either i use the shutdown menu in Unity/LightDM or use sudo shutdown -h now
the system just locks, and i can't either use Alt+reisub. Only a hard shutdown works.
If i shutdown from a tty, this is the last output i get before the system freezes:
umount: /run/lock: not munted
umount: /run/shm: not mounted
mount: / is busy
* Will now halt
[...] Power down.
After this the disk usage led turns on and i can't do anything else.
What could be the problem?
What i have tried
- set
acpi=force
in GRUB doesn't help; - check for errors in the shutdown process: i get any error at all during shutdown, except the lines stated on top;
acpid
is installed.- reboot/suspend works just fine!
Edit
As seen here i get some warnings regarding ACPI in /var/log/boot.log
.
mount: / is busy
... what? You sure you didn't install any packages that might have interfered with the shutdown?