Plasma 6.3 - Dual Screen Issue - BlackScreen regulary for 3 Seconds - HDMI

Help
1

Well i don’t know if its KDE, QT, Nvidia, Wayland, Kwin, OpenGL or some other Libs and Apps.

Monitor-1 Display Port has no Issues
Monitor-2 HDMI regulary (maybe 2 or 3 times in a hour went black for 2 - 3 seconds, if done on top left i see Monitor information “HDMI”)

So it seems completely de-connect an re-apply.

Betriebssystem: MX Linux 25.1 (Trixie)

  • systemd
    Kernel-Version: 6.12.74+deb13+1-amd64 (64-bit)

KDE-Plasma-Version: 6.3.6
KWin version: 6.3.6
XCB compile version: 1.17.0
KDE-Frameworks-Version: 6.13.0
Qt-Version: 6.8.2

Grafik-Plattform: Wayland
Server: X.org v: 1.21.1.16 with:
Xwayland v: 24.1.6
compositor: kwin_wayland
OpenGL v: 4.6.0
compat-v: 4.5 vendor: nvidia mesa v: 580.126.18
glx-v: 1.4

Prozessoren: i5-14600K
Speicher: 64 GiB of RAM
Grafikprozessor 1: NVIDIA GeForce RTX 4070 Ti SUPER
driver: nvidia v: 580.126.18
non-free: 550-570.xx+
1 - BenQ: EW2750ZL 1920x1080 -DP
2 - Lenovo LT2223pwC 1920x1080 - HDMI

Wayland Log:

interface: ‘zxdg_output_manager_v1’, version: 3, name: 31

xdg_output_v1

output: 61

name: ‘DP-5’

description: ‘BNQ BenQ EW2750ZL’

logical_x: 0, logical_y: 0

logical_width: 1920, logical_height: 1080

xdg_output_v1

output: 60

name: ‘HDMI-A-5’

description: ‘Lenovo Group Limited LEN LT2223pwC’

logical_x: 1920, logical_y: 26

logical_width: 1920, logical_height: 1080

2

Check your cable is well seated.

I have a screen doing something similar whenever I turn on some other electric appliance (I have a KVM switch) on the same circuit.
In my case since it is systematic I have guessed it is due to electrical sensitivity of my screen, because some electronics are more sensitive to dirty electricity than others or some other electricity factor.

3

Interesting because i do have a simple KVM Switch as well. Forgot to mention it.

Thank you very much, this could be a solution.