New
#11
One thing I forgot to mention, and which might prove to be important, is that I use Wake On Lan functionality to wake that computer. The behavior I described above takes place in response to a WoL magic packet. The computer wakes up and then immediately falls asleep again. The next WoL packet wakes it up permanently.
I'll try to wake it up using the power button and see it it makes a difference. It shouldn't... but who knows?