The output of xrandr shows that 1920x1080 is not listed as an available resolution for your DP-4 display. This usually means your monitor or graphics driver does not report this resolution as supported by default.

How to Add and Select 1920x1080 on Linux Mint 22.3 Cinnamon

1. Check if your monitor supports 1920x1080

• Run:
  bash

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  cvt 1920 1080

• This will output a modeline for 1920x1080. Example:
  text

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  Modeline "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync

2. Add the new mode

• Use the modeline to create a new mode:
  bash

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  xrandr --newmode "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync
  xrandr --addmode DP-4 "1920x1080_60.00"

3. Apply the new resolution

• Switch to the new resolution:
  bash

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  xrandr --output DP-4 --mode "1920x1080_60.00"

4. Make it permanent

• Add the above commands to your .xprofile or .xinitrc file in your home directory.

Alternative: Use GUI (Cinnamon Settings)

1. Open Menu > Preferences > Displays.
2. Select your display (DP-4).
3. If 1920x1080 is not listed, click Add Custom Resolution and enter the modeline from step 1.

Troubleshooting

• If you get an error like xrandr: cannot find output "DP-4", double-check the output name with xrandr.
• If the resolution is still not available, your graphics driver or monitor may not support it. Check with:
  bash

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  sudo lshw -C display

• For NVIDIA/AMD/Intel, ensure the correct proprietary drivers are installed.

Let me know if you need help with any step or if the resolution still doesn't appear!