--force-grab-cursor not grabbing cursor

[yasen-pavlov]

Is there an existing issue for this?

• I have searched the existing issues

Are you using any gamescope patches or a forked version of gamescope?

• The issue occurs on upstream gamescope without any modifications

Current Behavior

On the most recent commit of master (328f06b), when I start gamescope with --froce-grab-cursor the mouse is not grabbed as expected , it was last working for me on 328f06b (the commit before the latest batch of commits from 2 days ago).

Steps To Reproduce

1. Start gamescope with gamescope --force-grab-cursor --
2. Move the mouse around in a windowed application (also having the same issue when it's full screen)
3. The cursor is able to leave the window

Hardware information

- Distro: Arch
- CPU: Intel Core i9 - 9900K
- GPU: NVIDIA GeForce RTX 2080 Ti 
- Driver Version: 565.77

Software information

- Desktop environment: Hyprland(0.46.0f commit 56153a9c1b0a00fac0932a95e0cfa5a4f6c681f)
- Session type: wayland
- Gamescope version: 3.16.1-34-g328f06b
- Gamescope launch command(s): `--force-grab-cursor`

Which gamescope backends have the issue you are reporting?

• Wayland (default for nested gamescope)
• DRM (default for embedded gamescope, i.e. gamescope-session)
• SDL
• OpenVR

Logging, screenshots, or anything else

Video showing the issue on the current commit:

bad_compressed.mp4

And a video without the issue on the latest good commit:

good_compressed.mp4

[matte-schwartz]

this issue is partially fixed with 19dc18e but --force-grab-cursor seems to lose its lock on to the main window after alt-tabbing or not establish one properly in the first place.

gamescope -e --force-grab-cursor -- steam -steamdeck -steamos3 on Fedora 41 KDE Wayland w/ Mesa 24.3.3, NVK AD102

Screencast_20250121_203151.mp4

EDIT: also happens on Arch w/ a 7900XTX

[yasen-pavlov]

Great, 19dc18e fixes it for me on hyprland also when changing the the focus to another window and then back, though hyprland doesn't really have a notion for alt tabbing:

fixed.mp4

I don't have KDE installed on this machine, but I can install it a bit later to check if I can reproduce the same issue.

edit: just installed KDE and gave it a shot and the fix is working for me when I tried to run a few games

Screencast_20250123_004852.mp4

edit2: gah nevermind I just tried starting steam in big picture mode and I see the same behavior as @matte-schwartz

Screencast_20250123_005526.mp4

I also tried running a few other games and the fix worked as expected with all of them, I could only reproduce this with steam.

[matte-schwartz]

@yasen-pavlov appreciate the extra testing, seems like the main thing that regressed is using -e in gamescope w/ embedded Steam