How to debug a broken suspend/hibernate ?

[Andrew Haley]

On 04/06/2011 05:01 PM, Jaroslav Skarvada wrote:
> ----- Original Message -----
>> Under Fedora 14, my computer, an Asus U31J, cannot suspend/hibernate.
>> It attempts both, but hangs and has to be hard powered off. (I have
>> only tried F14.)
>>
>> How do you debug something like this? I guess I'd need to have some
>> tracing through the shutdown sequence to understand where it stops.
> 
> In case you used the pm-utils, consult the logs:
> /var/log/pm-powersave.log
> /var/log/pm-suspend.log
> 
> There is also script that can present you interesting information:
> # pm-utils-bugreport-info.sh
>
> something useful can be also found in syslog:
> /var/log/messages
> 
> Test suspend from runlevels 3, 5 by:
> # pm-suspend
> and also directly through sys interface:
> # echo mem > /sys/power/state
> 
> If the last one fails from runlevel 3 it is probably the kernel
> and it will require more advanced debugging.

That's how it looks.  The machine clearly tries to suspend, but after
a while the fan comes on at full power, so I suppose the processor is
stuck in a tight loop.

> Please file bug about it. And also please try the F15, there are 
> various improvements

OK, I will.  Thanks.

Andrew.