Screen wont turn off

[erbenton]

I am running the latest TW update 08/28/2025
I have tried both X11 and Wayland and double checked the system settings Power management and screen locking. I also tried xset for X11 and kscreen-doctor for wayland but the screen just wont shut off, not even for a second

for wayland I tried:
kscreen-doctor --dpms off
for X11 i tried:
xset -display :0 dpms force standby

neither one does anything at all

I compared systems ettings against another dekstop pc that works just fine and both are set the same for Power Management and Screen Locking

$ systemd-inhibit --list
WHO          UID  USER     PID   COMM            WHAT                                                                       WHY                                 MODE 
ModemManager 0    root     1513  ModemManager    sleep                                                                      ModemManager needs to reset devices delay
UPower       0    root     2623  upowerd         sleep                                                                      Pause device polling                delay
PowerDevil   1000 <me> 64403 org_kde_powerde handle-power-key:handle-suspend-key:handle-hibernate-key:handle-lid-switch KDE handles power events            block
3 inhibitors listed.

This used to work but stopped a few updates ago (yes I only use zypper dup)
Any ideas?

[knurpht]

Sorry, but we have asked you before to post output as pre-formatted text ( </> ). This is unreadable.

[hui]

Did you already test with a fresh user profile? No problems here with Plasma Wayland. The display turns off after the defined time.
systemsettings->Power management

Did you check the energy and battery applet which application blocks the standby?

[erbenton]

It turns out it was the nvidia driver 580.xx.x has bugs, installing a prev version solved the prblem