Display not responding to brightness change

[scotty65]

It is a known Plasma issue, with a fix hopefully arriving when ddcutil v2.2.7 is released.

You might want to have a read of this recent topic for some advice on dealing with the dimming issue:

KDE-Manjaro Testing release issue with display dimming after resume from sleep

Hi, I have recently switched from stable to testing release (following the instructions on Manjaro Wiki) and I noticed a strange behavior with screen dimming. When PC resumed from sleep the display brightness was not restored. It stayed as it was just before the PC goes to sleep. [EDIT] Meaning, it retained the dim state not the normal brightness setting [/EDIT] I checked the settings in KDE but nothing indicated something different compared to stable release which I was using for more than …