Some apps hang with muvm-x11bridge

[whitebelyash]

Some apps hang when running them in muvm with x11bridge. Does not happen with sommelier.

How to reproduce (with glxinfo for example):

1. Run muvm with x11bridge (muvm -x before b40bf03)
2. Run glxinfo -B
3. Observe hang

Can also be reproduced with PrismLauncher when starting a Minecraft instance - launcher window hangs.
Running it with strace gives this:

read(32, "name of display: :1\ndisplay: :1 "..., 4096) = 4096
read(32, "GL core profile profile mask: co"..., 4096) = 4096
read(32, 

Seems like it calls glxinfo which causes a hang.

Host: MacBook Air M1
OS: Fedora 41 GNOME (Asahi)
muvm: 0.1.4 (from asahi repos)

[alyssarosenzweig]

Hanging inside xshmfence

#0  0x0000fffff7c561e4 in syscall () from /lib64/libc.so.6
#1  0x0000ffffee6c0fb8 in xshmfence_await () from /lib64/libxshmfence.so.1

[kaazoo]

same with muvm 0.2.0

[whitebelyash]

Seems like hangs aren't present with zink driver (instead of native opengl).
So, doing export MESA_LOADER_DRIVER_OVERRIDE=zink should workaround this bug before it gets fixed.