The first step is just figuring out the current display naming and settings, that’s done by just running xrandr -listmonitors ~ $ xrandr -listmonitors Monitors: 2 0: +*DVI-D-0 1920/531x1080/298+0+0 DVI-D-0 1: +DP-2 3840/600x2160/340+1920+0 DP-2įrom this, we know that the name of the high refresh monitor is DVI-D-0 because of the resolution, and the 4K monitor is DP-2. Luckily Linux comes with a very handy command line tool called xrandr, it is the swiss army knife for display management.
You can’t choose to scale at any factor other than 2. 
Both monitors get scaled, so everything in the 1080p monitor looks gargantuan. There are two serious limitations for this case. In Mint 18.2 Sonya, the built in support was only limited to choosing between having the User Interface Scaling to be double (for Hi-DPI), normal, or auto (which would pick one of the two). Starting in Mint 17 Qiana, HiDPI support was introduced into Linux Mint. To note, the two monitors I’ve listed are physically side by side for this setup. I’ve listed the CPU to note that the AMD Ryzen, unlike an Intel processor, doesn’t have any integrated graphics. 
The GPU is important only because it uses an NVIDIA driver, the NVIDIA X Server Settings tool that comes with it is very handy. Also it seemed even among different versions of Linux Mint Cinnamon, there were varying solutions. The distribution is important because different Linux distributions use different display managers. As this is my first contribution trying to help, any guidance or suggestions would be valuable. So that is as far as I’ve gotten along this path. If I can figure that out, then I’ll need to learn to make the script execute upon login. When I run this, the 1080p monitor changes resolution and is completely usable, but the wallpaper doesn’t scale.
Made the script executable permissions:Īnd now I can execute the file by simply typing:. (notice that the first entry is commented out, as I set the 4k monitor using the displays setting program in plasma) #xrandr -output DisplayPort-2 -scale 1.5x1.5 xsession (hidden file by virtue of the “.”) with nano and saved it my user directory: I made sure I wasn’t running wayland as all I found applied to xorg: Here is what I’ve found on a beautiful website by Enoch Tsang which sadly appears to have recently disappeared but I found it on and will include the text here after I show my steps:
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