Sensitivity tied to screen resolution

[Xinayder]

Your system information

• System information from steam (Steam -> Help -> System Information) in a gist: https://gist.github.com/Xinayder/9d064f9843d4e1d9e39143983fcde0b2
• Have you checked for system updates?: Yes

Please describe your issue in as much detail as possible:

The mouse sensitivity seems to be tied with the game's resolution. Changing to a different aspect ratio and resolution, like 4:3, 1024x768 will make your mouse sensitivity be lower.

Steps for reproducing this issue:

1. Change aspect ratio to 4:3 and resolution to 1024x768
2. Apply settings

[deanrih]

Can confirm, also setting to lower resolution seems to make the game to "skip" some mouse movement, for context I have 4K Monitor using RTX 2060, the game run... okay, but the mouse movement itself is the same as CS:GO, but when trying to use lower resolution, e.g 1080 so I can get more FPS (not much), my mouse become somehow slower and skips certain small movement, and if I swing around the mouse left and right, it eventually drift towards bottom right, perhaps because I have 2 monitors( 1 4K and 1 1600x900 on the right )? but that doesn't tell the bottom part of the drift. Note that the drift doesn't occur on 4K resolution

Update:
My system configuration is
Manjaro (Arch Linux)
Intel i3-8100
NVIDIA 2060
2 Monitors (1 4K < primary >, 1 1600x900 <secondary, located on the right side of the primary>)

[Xinayder]

@deanrih that's what I noticed as well, on lower resolutions it seems like the mouse is drifting towards the bottom right corner, as if something was physically impeding the mouse cable and constricting its movement, even though it isn't.

I managed to record a video trying to show the problem. In both cases (1024x768 and 1080p), I was moving my mouse at roughly the same speed.

https://youtu.be/nsN1LUU18Us
https://youtu.be/6toVSxiF34E

[UNIm95]

Can confirm.
I have even 2 issues with resolutions and CS2.

Issue 1:
Same like by @Xinayder
If i change resolution of screen and or game - mouse sensitivity changes in CS2.
If i check it with Team Fortress 2 it changes only if raw input is not enabled.
It looks like CS2 does not have raw input at all.

Issue 2
If game has different resolution from display, i'm getting dead zone for mouse movement.
How to reproduce:

1. Set native display resolution.
2. Set game resolution lower than monitor resolution.
3. Set mouse dpi to 800, im-game sensitivity 2.12
4. Start any type of game(in -menu mouse works)
5. Try to slowly move mouse and notice that crosshair is not moving.

My Setup:
Ubuntu Mate 22.04 with X11.
Ryzen 9 3950x
64GB RAM
Radeon 5500x
2 4k Displays.
Mouse Logitech G502

[gerelef]

Adding that is happening on the latest build currently on Fedora 37/GNOME Xorg with Ryzen 5 3600 / 2070 SUPER on 4:3 (1280x1024)

Sidenote: when I lowered my mouse's polling rate to below 500, this issue stopped (tested with 2 mice)

[sevuu]

Lowering my mouse's polling rate to 125 did make this issue less noticeable, but the deadzone is still here.
Playing 4:3 stretched (1280x1024) on 1000hz polling rate is basically impossible, on 125hz it's playable, but aiming still feels very off

My setup:
Arch Linux + BSPWM (X11)
6.4.11-273-tkg-eevdf kernel
Intel Core i5 8400
Nvidia GTX 1070
Two 1080p monitors (60 & 144hz)
Razer Viper Mini

[Inq-B]

Exclusive fullscreen is the only option that works but it's forced to 60hz without the ability to change it.

• Distribution: Debian 12 (6.1.0-12-amd64)
• Graphics Card: RTX 2070 Super
• CPU: Ryzen 5 5600X
• Graphics Drivers: Nvidia PPA 535.104.12
• Display Server: X11
• Mouse: G502

[miklhh]

I can confirm this issue as well!

I have the same problem on my laptop. Any non-standard resolution leads to this problem.

[LennoxLuther]

I am having this issue too on Fedora 38 withe steam flatpak. Tested with X11 and wayland and both have the issue. The issue is only in full screen or windowed full screen.

There is a deadzone when moving slowly up or left., if you move the mouse quickly it will respond but not quite as far as expected. Down and right movement seems unaffected.

I am playing at 1920x1080 on a 2560x1440 display. When I play at native resolution or in a 1080 window it works fine. I've tried with gamescope but that made no difference. Polling rate lowered will mask the issue rather than resolve it.

It makes the game unplayable, I have resorted to playing in a window in the middle of the screen.