Dual Monitor Issue

[viking007]

Greetings,

I'm new to the Linux environment so am a tad green but I've got a pretty good grasp on computer hardware having almost 25 years experience building and diagnosing computer systems with Windows.

I'm running a dual monitor setup on an ASUS TUF F17 Gaming laptop with dual boot between Win 11 and Debian 12.8 with Cinnamon.

Specs:
Intel 13700H with Iris Xe Graphics
NVIDIA RTX4060 Laptop GPU
500GB SSD with 306GB for Windows and the remaining to Debian
16GB Ram
2 Generic 1080p TV's with HDMI inputs

My issue is that with the laptop closed, I can only get the one screen (Plugged into the USB=C Display Port using a USB-C to HDMI adapter) to function. When I check the display settings the upper left hand corner of the screen shows the wrong TV being active which is overlaying the laptop screen. When I open the laptop up, the laptop screen starts up showing as the primary display and the TV plugged into the USB-C port shows as the TV I have plugged into the laptop's HDMI port with nothing displaying on that actual TV. I've tried adjusting the laptop's built in screen refresh rate to 60.1Hz which matches both TVs with no luck.

I've done several searches to no avail.

Feel free to ask me for more details and I'll provide them as best I can.

[Dai_trying]

I had similar issues in the past while using a laptop in a similar way, my solution was to disable the lid switch(*) and then turn off the laptop screen in the display settings, this should prevent lid closing from changing anything but also allow the laptop screen to be off leaving your external screen(s) working.

(*) I do not recall where the setting for this is but thought it was lightdm.conf but a quick check here and I can't see it, hopefully somebody else might chime in with that info, although looking at xfce power manager I see lid close actions are there but not sure any of the offered options would be a fit. ymmv

NOTE: This was done with Xfce DE and I cannot say how other DEs would handle it.

[arzgi]

Hello!

Which programs did you use?

Do you use Nouveau or prorietay nVidia?

Does xrandr identify your tv's (you have to run in the terminal, like

Code: Select all

arto@dell:~$ xrandr -q
Screen 0: minimum 320 x 200, current 1366 x 768, maximum 16384 x 16384
eDP-1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 293mm x 165mm
   1366x768      60.00*+  40.00  
   1280x720      60.00    59.99    59.86    59.74  
   1024x768      60.04    60.00  
   960x720       60.00  
   928x696       60.05  
   896x672       60.01  
   1024x576      59.95    59.96    59.90    59.82  
   960x600       59.93    60.00  
   960x540       59.96    59.99    59.63    59.82  
   800x600       60.00    60.32    56.25  
   840x525       60.01    59.88  
   864x486       59.92    59.57  
   700x525       59.98  
   800x450       59.95    59.82  
   640x512       60.02  
   700x450       59.96    59.88  
   640x480       60.00    59.94  
   720x405       59.51    58.99  
   684x384       59.88    59.85  
   640x400       59.88    59.98  
   640x360       59.86    59.83    59.84    59.32  
   512x384       60.00  
   512x288       60.00    59.92  
   480x270       59.63    59.82  
   400x300       60.32    56.34  
   432x243       59.92    59.57  
   320x240       60.05  
   360x202       59.51    59.13  
   320x180       59.84    59.32  
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)
arto@dell:~$