Comment # 6 on bug 67723 from Bastian Triller

Wow, that was a fast answer.

Resume with dpm=0 works. With dpm=1 only with power adapter attached. Screen
stays black and laptop starts heating up and I have to force off the laptop.
The laptop is pingable but SSH doesn't work, neither a new session nor an open
one. It makes no difference if I suspend with or without power adapter.