UPS wrong low battery level even though it's full

Distribution

LMDE 6 Faye

Package version

6.2.9

Graphics hardware in use

AMD RX6600

Frequency

Only occasionally

Bug description

Randomly when using the system a notification showed up that the power level is low (I have connected an APC Back-UPS via USB) even though the power was at full, which sent my system into hibernation however when clicking a key to boot the system back up the login screen for inputing the password was frozen and after about 30 seconds of it being frozen the system shut down and restarted itself. After the restart the battery was showing back at 100% in LMDE it was showing as "Fully Charged". Before this event the battery was shown as fully charged, this even happened during watching a show using Celluloid.

Steps to reproduce

Cannot reproduce it since it happened randomly after 3 days of using LMDE.

Expected behavior

Wrong battery power, which forces the system to go into hibernation should not happen.

Additional information

I have other high power devices on the UPS that did not shut down or show any problems during this event, it only happened to the Mint system, the UPS did not display any warning of it going into battery mode or being low powered.

Start by tracing Cinnamon's UPS battery-level notification and hibernation path, using the APC Back-UPS over USB and the reported low-power event as the scenario to investigate. The issue is not reproducible and names no files or tests; done means identifying why a full UPS is reported as low and preventing an incorrect hibernation, with the login and restart behavior checked as well.