I was trying to use rtcwake to put the laptop to sleep via the disk but the disk option is not available.
Is it a misconfiguration or it's not supported at all by my laptop? How can I investigate this and ideally enable the disk option?
$ sudo rtcwake -u -s 60 -m disk
rtcwake: unrecognized suspend state 'disk'
$ cat /sys/power/state
freeze mem
Thank you
