get suspend/resume working

[quarkbuddha]

Hi. I'm trying to get one of these working as well, using Ubuntu Mate. I hope you don't mind if I track some of my efforts here rather than on my own fork - I think it makes more sense that way.

Using the 5.4.6-050406-generic kernel, one suspend/resume cycle appears to work, but after a second suspend, the resume doesn't resume.

[RobinVanCauter]

Does the power usage during suspension appear to be normal for you?

If I suspend in windows, put the notebook down and open it up next morning, it's at the same battery level. When I do the same with Linux, the battery is completely empty by the time I open it up again.

[quarkbuddha]

i have a device called a "Kill A Watt" that can show the actual power consumption of something plugged into it. The AC adapter alone draws 3VA. The laptop before power draws 5VA. During use, it draws 45-112+ VA. When suspend is working, it goes down to 6VA.
With this kernel. the 1st suspend doesn't even work consistently.

[s-light]

@quarkbuddha feel free to use here to track things!
its definite easier to find solutions focusing in one place / this way!

with kubunt 19.10 suspend is working most of the time -
but only with a ~50% chance that the resume works..

sometimes suspend is not working:
than the lower screen is not turning off / or the fans do not turn off.
and i also had the case that i thought it was off and put it in my bag.
next time i pulled it out it was off and warm....
(something did not turn rally off and just converted battery-power to heat :-( )

if resume is working it can take sometimes > 50seconds until it really starts.
sometimes its just as it should and is more or less instantly back online.. (but that happens rarely)
i have seen messages about 'timing' and 'clock recovery not working'...

in the 50% cases where it does not resume i have to 'hard power off' by holding the power-button for > 10sec. then wait ~5sec and then start normaly with the power button.
if iam to fast to click the power button after the hard shutdown it does not react - so seems there is a 'wait-time-delay' thing at the power-controller for this state...

i also have sometimes the case that it does not start up at all (from a full power off state)

• then it freezes at the 'kubuntu' logo...

but currently have no motivation to investigate any of this in more detail :-(
so currently i use the normal shutdown everytime..
(kubuntu restores the session / opened windows)
and as fare as i have experienced a cold-start is faster than a resume...

[s-light]

just a update:
for me currently suspend to ram works in about 99% times -
so i use the krunner sleep command regularly. and only in some rare cases is the laptop frozen or does not wake up...