Comment 131 for bug 35174

Although I have not fully diagnosed it, I am have some occasional
problems with suspend as well, but I am always able to get the laptop to
resume.

The problem seems to crop up when I change power states during the
suspend (e.g., I suspend it on AC and try to resume it on battery
power). Sometimes when doing this, it seems to get stuck resuming
before the LCD is turned on. This can be solved by cycling between AC
and battery. Often it starts up immediately during the first state
change, but sometimes it takes several tries and a bit of waiting.

Upon resume from these suspends, Network Manager seems to be broken, and
I need to restart dbus to get it working again, which isn't the case for
normal suspends but is the case when I hibernate the machine.

As the symptoms of this are significantly different than my earlier
resume problems, I think this should probably be filed as another bug.
ZZZ, can you get your machine to resume following this method?