Andrey Borzenkov wrote:
> I suspect new ACPI AC adapter code but have to add some printk's to be sure.
> 
> To reproduce - plug in AC cord, suspend, unplug, resume - kpowersave and sysfs 
> still show AC adapter online. Or other way round.
> 
> -andrey
Please check if this patch helps.

Regards,
Alex.