No video output when using gamescope under x.org/x11

[NavyPurpleVeil]

$ gamescope -w 1440 -h 1080 -i -- bash -c "steam-native 1>/dev/null 2>/dev/null"
No CAP_SYS_NICE, falling back to regular-priority compute and threads.
Performance will be affected.
wlserver: [backend/headless/backend.c:82] Creating headless backend
vulkan: selecting physical device 'NVIDIA GeForce RTX 2070 SUPER': queue family 2
vulkan: physical device supports DRM format modifiers
vulkan: vkGetPhysicalDeviceFormatProperties2 returned zero modifiers for DRM format 0x3231564E (VkResult: 0)
vulkan: supported DRM formats for sampling usage:
vulkan:   0x34325241
vulkan:   0x34325258
wlserver: Running compositor on wayland display 'gamescope-0'
wlserver: [backend/headless/backend.c:18] Starting headless backend
wlserver: [xwayland/sockets.c:63] Failed to bind socket @/tmp/.X11-unix/X0: Address already in use
wlserver: [xwayland/server.c:92] Starting Xwayland on :1
wlserver: [types/wlr_surface.c:748] New wlr_surface 0x557a20e92c60 (res 0x557a20e9aaa0)
wlserver: [xwayland/server.c:250] Xserver is ready
pipewire: stream state changed: connecting
pipewire: stream state changed: paused
pipewire: stream available on node ID: 52
pipewire: renegotiating stream params (size: 1280x720)
wlserver: [types/wlr_surface.c:748] New wlr_surface 0x557a20c1d3b0 (res 0x557a20e9fa40)
Error getting buffer
xwm: error 3: BadWindow (invalid Window parameter) request 15 minor 0 serial 833
wlserver: [types/wlr_surface.c:748] New wlr_surface 0x557a20d57e70 (res 0x557a20e9c850)
Error getting buffer
wlserver: [types/wlr_surface.c:748] New wlr_surface 0x557a20d53330 (res 0x557a20ea1fc0)
Error getting buffer
wlserver: [types/wlr_surface.c:748] New wlr_surface 0x557a20e72b80 (res 0x557a20ea2bc0)
Error getting buffer
wlserver: [types/wlr_surface.c:748] New wlr_surface 0x557a20e741e0 (res 0x557a20ea3750)
Error getting buffer
wlserver: [types/wlr_surface.c:748] New wlr_surface 0x557a20e6fd00 (res 0x557a20eb3750)
Error getting buffer
xwm: error 8: BadMatch (invalid parameter attributes) request 42 minor 0 serial 11662
xwm: error 3: BadWindow (invalid Window parameter) request 15 minor 0 serial 11879
(EE) failed to read Wayland events: Broken pipe

[ghost]

I tried to make the Port Royale 2 not look squished by having a virtual desktop. Any chance it could work with something like Xephyr?

[yaomtc]

Also have this issue. I was trying to test Final Fantasy XIV with gamescope under Plasma (X11)

[yaomtc]

Update: I can't reproduce this anymore. @NavyPurpleVeil, please test again and close the issue if it doesn't happen for you anymore