Post about getting MythTV backend to wake for recordings

Thanks, Lester_Burnham for this post!

Simple test to wake the machine 5 minutes from now (if this works, you're pretty much set)

sudo sh -c "echo 0 > /sys/class/rtc/rtc0/wakealarm"
sudo sh -c "echo `date '+%s' -d '+ 5 minutes'` > /sys/class/rtc/rtc0/wakealarm"
cat /sys/class/rtc/rtc0/wakealarm

Check

cat /proc/driver/rtc

This should return a list of parameters. Check the alrm_time is 5 minutes into the future and the alrm_date is today. Shutdown your computer and see if it comes back up in ~5 min.

sudo shutdown -h now

If the alarm is set then you should see something like this. If so then shutdown and see if it wakes up at the alarm date/time.

rtc_time : 13:40:26
rtc_date : 2008-12-21
alrm_time : 10:45:00
alrm_date : 2008-12-22
alarm_IRQ : yes
alrm_pending : no
24hr  : yes
periodic_IRQ : no
update_IRQ : no
HPET_emulated : no
DST_enable : no
periodic_freq : 1024
batt_status : okay