System breaking after updating

[ayyylmao]

Updated from 19.04 and now I have many different problems occuring randomly
- black screen instead of luks password input
- black screen after I input luks password
- freeze after desktop shows up
- system working but slow as ****, opening windows freezes stuff for a moment, especially noticeable when using Kvantum themes because title bar in windows is invisible for a few seconds, stuff is frozen and then it loads after a moment. Thought the slowness is Kvantum's fault but I returned to the default look and feel and it still happens, opening start menu makes it transparent and only after a while stuff loads etc
- can't restart/close the system, pic related happens and goes forever

two last problems are the most often

What's weird when I connect a charger to my laptop it seems to be ok. I did about ten tries with and without charger now and when charging system always loads and closes as it should but it could have just been luck.
I would paste some logs but I don't know where to look.

[jasoncollege24]

if connecting the charger makes it work as it should, it may be a power problem. Check your power saving settings to make sure they match the settings you want, when PC is on battery.

[rodrmigu]

Hi,

I'm facing the same issue, similar error messages you sent in your screenshot. Some times I can pass over the login, but very slow and get lots of error messages when shutdown, which takes quite some time.

- Hardware: ASUS VivoBook F412DA, AMD Ryzen 5 3500U.
- It works ok after logon and unplugging the charger.
- Behavior can be observed using LiveCD when the charger is not connected.
- Ubuntu 19.10 works ok on both scenarios (charger plugged/unplugged).

Thanks & Regards
Rodrigo