Hi!
It's my first days on Zorin after switching from windows. I'm used to playing 1920x1440 when in Counter Strike 2. I have a 2560x1440 Xiaomi monitor and i was trying the whole day to make this work. The only solution I have found so far that is really not ideal is to set monitors resolution to 1920x1440, but i really don't want to switch this daily. After reading countless threads the best solution was to use gamescope. After installing it i get an error that there is no candidate or something like that. Same thing happens when i try to build the app from scratch in the terminal. It seems like gamescope is installed and not installed in the same time basically, and I'm really confused on what to do at this point. The launch options I use for cs are: gamescope -W 2560 -H 1440 -w 1920 -h 1440 -S stretch -f -- %command%. When launching the game with these settings I get the error "AppSystemDict: Error in Init () of interface "RenderDeviceMgr001"! I'm on Zorin 17.3 Core edition. I also tried launching cs2 through Lutris but that also didn't work out and i'm running out of ideas.
Hello and welcome to the forum!
Ah yes, i did this too when i used to actively play Counter-Strike 2 on Zorin. What i did was make a script to change it from native to stretched 4:3. This can be done by using xrandr. When you first get into it, it can be overwhelming - consider reading up on this post
I had this script a couple of years ago i had bound to a key, so i only needed to do ALT+F8 to enter the stretched resolution - it was really nice. Sadly its lost in the eternity of all my distrohops.
Hopefully this helps though, if you're still struggling with this in a few days - maybe I'll be down to make a more user friendly script for this.
EDIT: If you just want it to work you can use the nvidia server settings app to set it manually.
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As an Addition to that: xrandr only works in X11/Xorg and not with Wayland.
Thank you so much for your answer, I hope this will resolve it. Regarding the nvidia software, would it work with amd gpu?
If you have an amd gpu, you'll have to go for the xrandr solution
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Thanks once again! After 20 minutes of writing scripts it finally works! I also managed to bind this to a shortcut and it works perfectly! 
Great to hear!
If its not too much to ask for, can you share the script here so that users searching for the same answer as you can download the script? Don't forget to rule out any sensitive information if you put that in there.
Well done!
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Agreed with @freshjeff please post the script here. When knowledge is shared, everyone benefits. 
