cage 0.2.1 crashes when pcsx2 (2.6.0 qt) tries to go fullscreen (wlr_xdg_surface_schedule_configure: Assertion `surface->initialized' failed.)

[aktau]

I'm on a NixOS 25.11 system (an intel N150 x86-64):

Linux xyber 6.18.2 #1-NixOS SMP PREEMPT_DYNAMIC Thu Dec 18 13:03:43 UTC 2025 x86_64 GNU/Linux

To reproduce:

/nix/store/bx9b0v3lr0xirb0rqzqnj8byxj9nvskn-cage-0.2.1/bin/cage -dD -- /nix/store/z930k2aacx9jz2xh32clljdx5b4h2irc-pcsx2-2.6.0/bin/pcsx2-qt -bigpicture

Then once inside the program (which works fine), click "View -> Fullscreen". It doesn't matter whether a game is playing or not

00:00:16.427 [DEBUG] [types/xdg_shell/wlr_xdg_surface.c:441] new xdg_surface 0x560033264870 (res 0x56003314d490)
00:00:18.125 [DEBUG] [types/xdg_shell/wlr_xdg_surface.c:441] new xdg_surface 0x560033264870 (res 0x56003315b1f0)
00:00:20.139 [DEBUG] [types/wlr_compositor.c:786] New wlr_surface 0x560033268cc0 (res 0x560033144950)
00:00:20.139 [DEBUG] [types/wlr_compositor.c:786] New wlr_surface 0x560033269090 (res 0x560033127c60)
00:00:20.139 [DEBUG] [types/xdg_shell/wlr_xdg_surface.c:441] new xdg_surface 0x560033264870 (res 0x56003310f370)
00:00:20.139 [DEBUG] [types/wlr_xdg_decoration_v1.c:220] new xdg_toplevel_decoration 0x560033267170 (res 0x560033118120)
cage: types/xdg_shell/wlr_xdg_surface.c:168: wlr_xdg_surface_schedule_configure: Assertion `surface->initialized' failed.

(It crashes with and without the -d flag.)

[aktau]

I thought the problem may be pcsx2 itself, but I tried gamescope --backend=gbm and that doesn't crash (and does fullscreen the app).

[emersion]

Probably already fixed in #461. Can you try cage's latest commit?

[aktau]

NixOS upgraded its cage to v0.3. I tested it out and it works perfectly (in fullscreen). When compared to gamemode:

• Positive: Cage does not slow down at all when using the mouse pointer. In fact, the mouse pointer is alwasy visible. Gamescope slows to a crawl when rendering 3D and simultaneously showing the mouse pointer.

• Negative: Cage does not have functionality to hide the mouse pointer (ideally it'd be like gamescope, which shows the mouse pointer when it moves, plus a couple of seconds afterwards, but then hides it).