Re: pm-suspend working, but pm-hibernate fails

["Rafael J. Wysocki" <rjw@sisk.pl>]

On Monday 01 March 2010, Ákos Maróy wrote:
> Rafael,
> 
> > You can actually do that with the in-kernel hibernate too.
> > 
> > Please read Documentation/power/basic-pm-debugging.txt, there are more
> > hibernate debugging hints in there.
> 
> thanks for the tip. I tried the various levels of hibernation, and the
> freezer mode works, while the devices mode fails the same as the
> 'normal' hibernation.
> 
> as the only point forward in the documentation is to do a binary search
> on the kernel modules by unloading them before the test, I'll have to
> find the time to do this. this is also quite complicated because of how
> modules depend on each other.

Well, you can try to boot the kernel with no_console_suspend and
initcall_debug in the command line, echo 8 to /proc/sys/kernel/printk and
repeat the failing "devices" test.

With a bit of luck, you'll be able to see which driver is failing from the
kernel messages printed to the console.

Rafael