How connect projector to Manjaro KDE?

Support Graphics & Display
,
1

so, i change XFCE to KDE and after that my projector cant connect through HDMI - just black screen on my projector. i dont understand why - win+p doesnt help, i think that KDE didnt see my projector, so where i can try to find it. help me pls understand cuz i dont understand what happend and what need to be fixed.

xrandr --listmonitors                                                                                                                        ✔ 
Monitors: 1
 0: +*eDP-1 1920/340x1080/190+0+0  eDP-1

figure out that my KDE on DellG15 didnt see hdmi at all. still dont understand what hapend)

2

What did you see in dmesg when you plug the projector in? Also, is this on a laptop with dual graphics? Can you ensure to which GPU the HDMI port is wired in? If to dGPU, is it enabled?

3

sry for late answer, work a lot this mounth.

  1. see nothing - controllers, ears - everything, but notprojector
  2. yeap - dual graphics
  3. i dont know how i can know that. try hybrid state at optimus-manager - but the same results

im confused, why reinstallation from xfce to kde did this with my HDMI