I'm having the same issue with Gigabyte board. The system boots up with the magic packet, but doesn't allow any connections or show any output via the screen.
Did anyone get anywhere with this?
The syslog doesn't help much, just starts the s3_sleep process and then shows boot up messages from when I do a reset, so it doesn't look at though the OS is waking up at all...
I just have wakeonlan g option set in Simple features.
Any help or suggestions would be awesome, thanks.