Jakub Vondra

19.0.594 works for me on pop!OS 21.10 even without the LD_PRELOAD hack,
no more random crashes at startup too,
so I guess it's fixed, thank you SideFX !!

I was googling xcb/QT related errors on linux and found this [askubuntu.com]

drew
This fixed the problem for us, except we were having it with Ubuntu 20.04/h19 (h18.5 was working ok). Curious to know how/where you found this fix? I wasted quite a few hours reinstalling nVidia drivers and other futzing around.

Cheers
Drew

kubo-von

mariusz8
In my case this fix is not working:

qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, webgl, xcb.

Ubuntu 21.10

That's a different error though.
You have to do

sudo apt-get install --reinstall libxcb-xinerama0

to fix this one.

Mirko Jankovic
Still no luck:

ERROR: ld.so: object '/lib/x86_64-linux-gnu/libc_malloc_debug.so.0' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
ERROR: ld.so: object '/lib/x86_64-linux-gnu/libc_malloc_debug.so.0' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.

It might be that the libc_malloc_debug.so.0 file is located elsewhere on Fedora. I'd check check if it actually exits at that location. If it doesn't, try to search for it in your system.