Arch Linux

highwayinthesky

Member

Registered: 2018-01-01

Posts: 1

Issues with Multihead HiDPI under Cinnamon on NVIDIA drivers

I'm running 2 monitors, 1 2560x1440 and 1 3840x2160, both connected to a GTX 1080 running proprietary drivers. In order to scale things reasonably, I'm using Cinnamon's HiDPI interface scaling option under Settings -> General, and then am running

xrandr --output DP-0 scale 1.5x1.5 --output DP-2 scale 1.5x1.5 --pos 3840x165

This scales and positions everything correctly, but causes two issues:

• Icons can only placed in the top left of each screen, and dragging only shows a selection box in that area; the mouse is functional and windows can be placed outside this area, however.

• The wallpaper is fractured and repeats with gaps between them. I've attached screenshots of both displays; wallpaper's set to centered mode.

Larger screen Smaller screen
I've read the instructions on the HiDPI wiki article regarding the panning option, but that seems only to apply to the issue where the mouse can't access the entire screen, as opposed to the desktop simply not functioning correctly outside of that area.

Also, I've tried this both with and without full composition forced in nvidia-settings.

I'm at a loss, and would greatly appreciate any help you could offer. If I've missed something stupidly obvious, by all means tell me, I'm here to learn.