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Ubuntu 12.10 will not shutdown or restart, even by using terminal commands such as:

sudo shutdown -r now, init 0, halt, etc.

I have noticed one thing, that whenever I reinstall NVIDIA drivers, the system can shutdown/reboot temporarily, but after one or two shutdowns/reboots, the problem happens again.

I'm not sure exactly when this problem started, but it was sometime after Tuesday or Wednesday April 10, when I installed automatic updates.

System:

Memory 3.9 GiB
Processor Intel Core 2 Duo CPU T7700 @ 2.40GHz x 2
Graphics GeForce 8600M GT/PCIe/SSE2
OS type 64-bit
Disk 113.9 GB

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    What error is displayed when shutting down? What happens?
    – Alex
    Apr 13, 2013 at 20:49
  • Should I post my /var/log/messages file here? No messages show up once I try to reboot or shutdown. The screen just goes black. Something I noticed today is that if I reboot right after the desktop screen loads, the reboot goes through. If I wait too long, then it will hang and not reboot or shutdown until I hard shutdown. Rebooting/shutting down also works after I log off.
    – user149102
    Apr 15, 2013 at 5:47
  • There's really no consistent behavior. It seems that the more I try to shutdown or reboot, the less likely it is that any of those processes will work. Reboot and shutdown -h now were working during the first few tries today, but then neither of them worked. I guess it's just some sort of system instability.
    – user149102
    Apr 16, 2013 at 5:13

1 Answer 1

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you can force a reboot by entering the following

echo 1 > /proc/sys/kernel/sysrq

echo b > /proc/sysrq-trigger

have you tried physically restarting the computer? if you don't have physical access be warned that if you force a reboot the computer might not come back online. force reboots are normally only needed if hardware has failed

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  • Something I noticed today is that if I reboot right after the desktop screen loads, the reboot goes through. If I wait too long, then it will hang and not reboot or shutdown until I hard shutdown.
    – user149102
    Apr 15, 2013 at 5:42
  • There's really no consistent behavior. It seems that the more I try to shutdown or reboot, the less likely it is that any of those processes will work. Reboot and shutdown -h now were working during the first few tries today, but then neither of them worked. I guess it's just some sort of system instability.
    – user149102
    Apr 16, 2013 at 5:12

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