Computer locking up after several days' uptime

[Jonas Pedersen]

Dotan Cohen wrote:
> 2008/9/28 Chris G <cl at isbd.net>:
>> Is it actually hung or just very unresponsive?
>>
> 
> So far as I understand it requires a hard reset. How can one determine
> "very unresponsive"?

A common way is to check if num lock or caps lock is still working. In 
most scenarios num lock and caps lock is still working if the machine is 
alive.

/Jonas