[ubuntu-uk] Server shutting itself down or going into a deep sleep

[Alan Lord (News)]

On 12/12/09 22:17, Neil Greenwood wrote:
> 2009/12/11 Alex Birchall<A.Birchall at mdx.ac.uk>:
>> When this happens I lose all remote access to the server, but I can
>> still ping it and get a speedy reply.  And when I go into the server
>> room to look at the server, I can see that there seems to be a lot of
>> activity on the hard disk (indicated by flickering lights).
>> Unfortunately, the monitor shows "No Signal Input" and nothing I do on
>> the keyboard has any effect.  So the only option is to physically switch
>> the server off and on.
>
> Have you tried using the Magic SysRq key on the keyboard?
> ...
> The meanings of the keys, IIRC:
> R - raw keyboard mode (stop X grabbing the key presses)
> E - send SIGTERM to all processes
> I - send SIGTERM to init
> S - sync the disks
> U - unmount the mounted partitions
> B - reboot

It's probably worth mentioning that you need to wait a second or 2 
between each key press. If you do it too quickly I have noticed it 
doesn't always work.

HTH

Al