The original post: /r/ubuntu by /u/rafisics on 2025-02-22 07:30:38.

I am trying to use xrandr and deskreen to use my iPad 9th gen as the 2nd screen of Ubuntu 24.04 LTS (X11). It is a follow-up to ‘https://askubuntu.com/q/1541971/947071’

❯ xrandr Screen 0: minimum 320 x 200, current 1366 x 768, maximum 16384 x 16384 eDP-1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 309mm x 173mm 1366x768 60.00*+ 40.00 1280x720 60.00 1024x768 60.00 960x720 60.00 928x696 60.00 896x672 60.00 1024x576 60.00 960x600 60.00 960x540 60.00 800x600 60.00 840x525 60.00 864x486 60.00 700x525 60.00 800x450 60.00 640x512 60.00 700x450 60.00 640x480 60.00 720x405 60.00 684x384 60.00 640x360 60.00 512x384 60.00 512x288 60.00 480x270 60.00 400x300 60.00 432x243 60.00 320x240 60.00 360x202 60.00 320x180 60.00 HDMI-1 disconnected (normal left inverted right x axis y axis)

❯ xrandr --addmode HDMI-1 1366x768

❯ xrandr
Screen 0: minimum 320 x 200, current 2732 x 768, maximum 16384 x 16384
eDP-1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 309mm x 173mm
 1366x768 60.00*+ 40.00  

 1280x720 60.00  

 1024x768 60.00  

 960x720 60.00  

 928x696 60.00  

 896x672 60.00  

 1024x576 60.00  

 960x600 60.00  

 960x540 60.00  

 800x600 60.00  

 840x525 60.00  

 864x486 60.00  

 700x525 60.00  

 800x450 60.00  

 640x512 60.00  

 700x450 60.00  

 640x480 60.00  

 720x405 60.00  

 684x384 60.00  

 640x360 60.00  

 512x384 60.00  

 512x288 60.00  

 480x270 60.00  

 400x300 60.00  

 432x243 60.00  

 320x240 60.00  

 360x202 60.00  

 320x180 60.00  

HDMI-1 disconnected 1366x768+1366+0 (normal left inverted right x axis y axis) 0mm x 0mm
 1366x768 60.00* 

❯ xrandr --output HDMI-1 --mode 1366x768 --right-of eDP-1

```Then, in Deskreen, I selected`Entire Screen`and then chose`Screen 2`. 
It appeared blank but my cursor was showing and moving smoothly. 
I tried to use the command`Shift+ Super`and arrow keys to move an app (`Firefox`) to`Screen 2`. It didn't work. Then I dragged`Firefox`with the cursor to`Screen 2`. 

This is how it appeared:
------------------------

### Ubuntu Screen

Trying to drag and move the Firefox window fully to `Screen 2`, it got stuck at the right on the Ubuntu screen this way:

[Screeenshot](https://github.com/user-attachments/assets/fd6c91e7-4049-442c-8d2e-e1a3d9ecbd50)

### iPad Screen

[Screenshot](https://github.com/user-attachments/assets/dd989ef8-e937-46e2-b35a-709766658239)

It's like having a glitch, continuously flickering. Even after closing `Firefox`, the issue persisted. Also, I tried with another app (e.g. `nautilus`) and got the same behavior. And if it is a 2nd screen, why would it appear blank in the first place? Am I misunderstanding something? 

How to resolve this problem?