I’m trying to setup an external monitor to use with my system, but I’m having trouble with making KDE recognize its plugged in.
xrandr
/xorg
does detect the display:
HDMI-1-0 connected (normal left inverted right x axis y axis)
2560x1440 143.93 + 120.00 59.95
3840x2160 59.94 50.00 29.97 25.00 23.98
1920x1080 119.88 60.00 59.94 50.00
1280x720 59.94 50.00
1024x768 60.00
800x600 60.32
720x576 50.00
720x480 59.94
640x480 59.94 59.93
Nov 28 22:07:43 nixos xserver-wrapper[1317]: (--) NVIDIA(GPU-0): LG Electronics LG ULTRAGEAR (DFP-4): 600.0 MHz maximum pixel clock
Nov 28 22:07:43 nixos xserver-wrapper[1317]: (--) NVIDIA(GPU-0): LG Electronics LG ULTRAGEAR (DFP-4): Internal TMDS
Nov 28 22:07:43 nixos xserver-wrapper[1317]: (--) NVIDIA(GPU-0): LG Electronics LG ULTRAGEAR (DFP-4): connected
And my Nvidia card seems to be working
Providers: number : 2
Provider 0: id: 0x54 cap: 0xf, Source Output, Sink Output, Source Offload, Sink Offload crtcs: 4 outputs: 1 associated providers: 1 name:Unknown AMD Radeon GPU @ pci:0000:06:00.0
Provider 1: id: 0x1f9 cap: 0x2, Sink Output crtcs: 4 outputs: 6 associated providers: 1 name:NVIDIA-G0
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 520.56.06 Driver Version: 520.56.06 CUDA Version: 11.8 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
| | | MIG M. |
|===============================+======================+======================|
| 0 NVIDIA GeForce ... Off | 00000000:01:00.0 Off | N/A |
| N/A 35C P0 N/A / N/A | 5MiB / 8192MiB | 0% Default |
| | | N/A |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: |
| GPU GI CI PID Type Process name GPU Memory |
| ID ID Usage |
|=============================================================================|
| 0 N/A N/A 1317 G ...xorg-server-1.20.14/bin/X 4MiB |
+-----------------------------------------------------------------------------+
I’m currently running the Nvidia Prime setup (3070m, 5800H) from the wiki with offload enabled and I have also added the special configuration mentioned for external displays. Config is here.
KDE however does not detect the display or give me an option to activate it.