Public bug reported:
The bug is very reproducible. Had to hard shutdown if HDMI cable is
plugged into my TV due to the hang. Unplug cable, boot up, shut down,
no hang anymore.
Ubuntu:
$ lsb_release -rd
Description:Ubuntu 12.04 LTS
Release:12.04
$ cat /proc/version_signature
Ubuntu 3
To clarify, after issuing halt, the shutdown sequence did start, just it
cannot complete and hangs. However I couldn't not see what it hangs at.
Is there a way to see the kernel output during shut down?
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As my comments before, I couldn't get the log as the bug happens during
shut down. If someone please tell me how to display/collect kernel
output during shutdown, I will provide a log for further investigation.
And I have no way to know what package is involved until a log is
collected.
Re brad-f
My bad, the hang happens regardless if the HDMI cable is plugged in or
not.
However it only happens when a "sudo halt" is issued, not when the machine is
shutdown from the menu. Tested on three kernels:
1) linux-image-3.5.0-030500rc5-generic + linux-image-extra (latest upstream
kernel)
2) Ubunt
