It seems like about once a month my laptop will get stuck in a sort of suspend/non-suspend state. Like now; I left it on the KDE lock screen for 10 minutes or so, came back later to a black (off) screen, power and charge lights on, fan off, and coil whine as if it were in suspend. Power button does nothing, unless held to force reset. I need this machine to be 100% reliable since its mostly for 2 things, school, and to carry around with me for hobby projects. Last time I checked "uptime" returned 11 days, I keep it in suspend when not in use, but any good system should run for much longer than that. Right?

Some info
Acer Aspire E15 (E5-576-392H), had for about a year now.
i3 8130u/620 uhd graphics, 8gb ram - 4gb x2, 240gb inland ssd, Kubuntu 19.04/KDE plasma 5.16 via ppa.
No physical mods. Some ware n' tare, minor dents here and there, and plenty of scratches, but nothing major that should effect functionality.

I'm considering installing Debian Stable, but I don't want to distro hop if the distro's not the issue. So any ideas for what's happening?

What do the logs say - not coming back from a screen lock doesn't really sound like a suspend/resume type problem. More likely a KDE issue. Just to eliminate some possible confusion, does suspend/resume itself work ok ?.

It could be the screen lock breaking, or a video driver issue.
I am using KDE Neon, which has plasma at 5.17.2, I had the same or simialr issue you mention, but the 5.17 update fixed it for me.

1 members found this post helpful.

What logs do you mean? I'm assuming power logs, but I don't know what to look for and nothing stands out for "last -x | head | tac" and "/var/log/syslog", at least that's what I found to look at after a quick search. And yes suspend/resume works almost all the time, except for when this happens.

Update: I threw in a spare HDD and installed Fedora 31. On Fedora this happens much more frequently, about 1/3 suspends.