Pop!_OS – CS2 Fullscreen only shows 60Hz & 120Hz on 240Hz OLED G9 (works fine elsewhere)

[kindred lichen]

OS: Pop!_OS 22.04
Hardware: Intel i7-13700KF, NVIDIA RTX 3080, Samsung OLED G9 (240Hz)

Problem:
Everything runs perfectly on my system — the desktop runs at 240Hz, and most games detect and use the full 240Hz refresh rate without issues. However, in CS2, if I switch the display mode to fullscreen, it only shows 60Hz and 120Hz as available refresh rates. 240Hz doesn't appear in the list.

What I’m doing / have tried:

Running CS2 in fullscreen windowed works fine and gives 240Hz, but I want to use proper fullscreen for lower input lag.

I’ve confirmed that 240Hz is enabled in the display settings and works in other games and on the desktop.

Using latest NVIDIA drivers from Pop!_OS.

Question:
Has anyone encountered this issue on Linux/Pop!_OS with CS2 and high refresh rate monitors? Is there a fix to make CS2 detect 240Hz in fullscreen mode?

Thanks in advance!

[kindred lichen]

Or the best distribution to avoid this issue|?

[formal geode]

Probably arch based.
I would run a check to see if you can get newer nvidia drivers + just see if that improves it.

Restart after install.

Use this and then the custom driver section to get the one you want.
https://www.reddit.com/r/pop_os/comments/ih8wn9/simple_way_of_installing_supporting_nvidia/

Check maybe also if your mitherboard needs a bios update for the 13th gen intel.

[kindred lichen]

hello,

I already have the latest nvidia driver version and the bios too..
I have tested on another PC with a Full HD screen and it works great, there are a linux fix for ultra wide résolutions maybe ?

[formal geode]

Is the hdmi \ whatever cord it uses plugged into the graphics card?

Installing the nvidia driver should have installed some nvidia server type software...see if you can adjust the resolution through there.

Resolution and refresh rate are two different things aren't they? 🤔

[kindred lichen]

In the Graphics card, yes (is use the same pc on Windows and i dont have this issue)

[kindred lichen]

in nvidia settings i have the right résolution, in cs2 too but i dont have 240hz option in cs, only 60 and 120

[formal geode]

Yep....
What about putting this in your steam launch options.

"Also removed all launch options except: -novid -freq 390 (390 is my monitor refresh rate) "

I'm wondering if it's a softcap.

https://www.reddit.com/r/GlobalOffensive/comments/168sbdy/fixed_all_my_stutterlag_fps_issues_in_cs2_doing/
This one is for windows, but trying on linux and seeing if it changing anything.