Problem with connection of external monitor - frozen screen, laptop


I have a problem with using an external monitor with laptop on LEAP 15.4., KDE:

Operating System: openSUSE Leap 15.4                 
     CPE OS Name: cpe:/o:opensuse:leap:15.4
          Kernel: Linux 5.14.21-150400.24.18-default
    Architecture: x86-64
 Hardware Vendor: Acer
  Hardware Model: Predator PT314-51s

Qt: 5.15.2
KDE Frameworks: 5.90.0
kf5-config: 1.0

The second monitor seems to be connected

xrandr --listproviders --listmonitors returns

Providers: number : 2
Provider 0: id: 0x6a; cap: 0xf (Source Output, Sink Output, Source Offload, Sink Offload); crtcs: 4; outputs: 2; associated providers
: 1; name: modesetting
   output eDP-1
   output DP-1
Provider 1: id: 0x44; cap: 0x2 (Sink Output); crtcs: 4; outputs: 1; associated providers: 1; name: modesetting
   output HDMI-1-1
Monitors: 1

nonetheless after “enabling” through display manager, nothing happens and the laptop screen completely freezes.

inxi -Ga returns

**Graphics:  Device-1:**Intel TigerLake-LP GT2 [Iris Xe Graphics]**driver:**i915**v:**kernel
**Device-2:**NVIDIA GA106M [GeForce RTX 3060 Mobile / Max-Q]**driver:**nouveau**v:**kernel
**Device-3:**Chicony HD User Facing**type:**USB**driver:**uvcvideo
**Display:**x11**server:**X.Org 1.20.3**driver:****loaded:**modesetting,nouveau**unloaded:**fbdev,vesa
**OpenGL:****renderer:**Mesa Intel Xe Graphics (TGL GT2)**v:**4.6 Mesa 21.2.4
**Audio:     Device-1:**Intel Tiger Lake-LP Smart Sound Audio**driver:**sof-audio-pci-intel-tgl
**Sound Server-1:**ALSA**v:**k5.14.21-150400.24.18-default**running:**yes
**Sound Server-2:**PulseAudio**v:**15.0**running:**yes

I saw a lot of similar problems connected to the KDE and drivers, however I’m still not able to find any soluton. I would appreciate any hints.
Thank you in advance for your reply.

Have you installed and used suse-prime?

Your inxi -Ga output looks wrong. Please, whenever you post command output, include the command, so we can be sure what happened and what we see match. Leap 15.4 provides a broken old inxi version. Try sudo inxi -U first to upgrade to latest version from upstream, then try inxi -Ga again.