Recent update caused this. What do I do?

Hi there.

The above error started to appear after a recent update. I get to the login screen and when I get into the system, it freezes and reboots with this message.

Further weirdness is that when I shut the system down it doesn't boot anymore until I power cycle the system, IE unplug the PC from the wall for 10 minutes or so.

I've had this issue in the past with Windows but not on Linux, which makes me think this has something to do with BIOS configuration that Cachy/Arch isn't a fan of, but I can't put my finger on it. All that I've changed in the BIOS is enabling XMP, setting a custom fan curve for the CPU fans, disabling secure boot and applying a -25 curve optimizer.

My system specs are:

Ryzen 7 5700X3D

16GB 3200 MT/s

AsRock B450M Pro4

Radeon RX 7800 XT

Did some googling and honestly I'm pretty confused. Some people mention disabling C-State, others recommend doing a memory test, or disabling the curve optimizer etc. This is odd to me because prior to this update the system was working entirely fine with these settings.

If more info is needed I'll provide it, this is just cursory info I thought I'd start with. Any help would be much appreciated. Cheers!

**EDIT:** ddcutil ended up being the problem, like many people said. The error message happens after reboot so I initially thought it's unrelated but yeah, this package somehow managed to spit out the error in the picture, which is extremely bizarre. Thanks to everyone that helped, appreciate it.