A few days ago I sent a proposal to add a HAL backend for power
management. Meanwhile, I fixed call Suspend and added support for
governor (not tested).
I also noticed that setting the brightness and governor is in condition
WITH_UPOWER, although in fact uses Trinity DBus daemon => has nothing to
do with upower. I added to the option WITH_TDEHWLIB_DAEMONS and fixed
incorrect WITH_UPOWER conditions.
Please test it. At the same time I'm waiting for your opinions -
incorporate it or not?