Hi! > If the device which fails to resume is part of a loadable kernel module > it won't be checked at startup against the magic number stored in the > RTC. > > Add a read-only sysfs attribute /sys/power/pm_trace_dev_hash which > contains a list of newline separated devices (usually just the one) > which currently match the last magic number. This allows the device > which is failing to resume to be found after the modules are loaded > again. > --- a/Documentation/power/s2ram.txt > +++ b/Documentation/power/s2ram.txt > @@ -49,6 +49,13 @@ machine that doesn't boot) is: > device (lspci and /sys/devices/pci* is your friend), and see if you can > fix it, disable it, or trace into its resume function. > > + If no device matches the hash, it may be a device from a loadable kernel > + module that is not loaded until after the hash is checked. You can check > + the hash against the current devices again after more modules are loaded > + using sysfs: > + > + cat /sys/power/pm_trace_dev_hash > + Yep, but exact semantics of that sysfs file should probably be linked in the sysfs documentation... Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
