mrsmithy

Yes, wake from sleep is working properly now. Thanks again!

Thanks!

I think it's because music is played but I will check it without any programs running

It's 0:

System-wide power settings:
Currently in use:
 standby              1
 Sleep On Power Button 1
 womp                 0
 halfdim              1
 hibernatefile        /var/vm/sleepimage
 powernap             0
 autorestart          0
 networkoversleep     0
 disksleep            10
 sleep                30 (sleep prevented by coreaudiod)
 autopoweroffdelay    28800
 hibernatemode        0
 autopoweroff         1
 ttyskeepawake        1
 displaysleep         30
 standbydelay         10800

Thanks, I will check this out!

Sierra, Dell Optiplex 9020, i7-4770, 24GB RAM, 256GB SSD, DP screen on Intel HD 4600
The machine will sleep fine, but it will not wake up properly. When using some of the darkwake flags, it will reboot instead of waking; with other darkwake flags, it will wake up partially: the HDDs will start spinning, but the monitors will remain blank such that the machine must be rebooted. Can anyone suggest a solution?
Thanks!