run gamescope got no picture

[SSSS-VIII]

Is there an existing issue for this?

• [x] I have searched the existing issues

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

• [x] The issue occurs on upstream gamescope without any modifications

Current Behavior

I can't use gamescope run vkcube and steam games. when I run steam games it displays no videos but only sound and steam set a STOP button means that the game is running.

I can see a Xwayland and the game running in btop, but no picture

console-linux.txt

and when I run gamescope --vkcube I got a ‘Failed to get Wayland objects‘ and the vkcube doesn't even running in the background (the instruction end and gamescope didn't show in btop) I dont know if they are same problem but the error message didn't shown in steam log

Steps To Reproduce

run gamescope --vkcube in Terminal

Hardware information

- Distro: "Fedora Linux 43 (Workstation Edition)"
- CPU: AMD Ryzen AI 9 365 w
- GPU: 	deviceName         = AMD Radeon 890M Graphics (RADV GFX1150)
	deviceName         = NVIDIA GeForce RTX 5070 Laptop GPU
	deviceName         = llvmpipe (LLVM 21.1.2, 256 bits)
- Driver Version: 580.95.05

Software information

- Desktop environment: GNOME 49
- Session type: Wayland
- Gamescope version: gamescope version  (gcc 15.2.1)
- Gamescope launch command(s): gamescope -w 2880 -h 1800  --  %command%

Which gamescope backends have the issue you are reporting?

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

Logging, screenshots, or anything else

No response