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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.

thanks! it helped me with houdini launcher not launching (no pun intended) on ubuntu 22.04

Hi everyone anyone got lucky yet?
i posted this on answerhub of renderman: https://renderman.pixar.com/answers/questions/19736/houdini-error-couldnt-find-valid-rman-in-distribut.html [renderman.pixar.com]

after spending almost eternity i got it to work on ubuntu now it won't render

here is a copypaste of the thread above:
​Hi everyone,

Just installed prman-ncr 23.4 on ubuntu 20.04 for houdini 18.0.532
i have three issues:
1. when I fire up the “it”, I get this error:

Couldn't find valid rman in distribution root
2. when i fire up the IPR, i get this error:
RfH: Could not initialize Renderman

3. Inside Solaris:
I see renderman listed in the hydra delegate list, however once i “select” it, viewport reverts to houdini openGL and renderman disappears from the dropdown


my .env file loks like this:

RMANTREE=/opt/pixar/RenderManProServer-23.4
​RFHTREE=/opt/pixar/RenderManForHoudini-23.4
RMAN_PROCEDURALPATH=$RFHTREE/18.0.532/openvdb:&
HOUDINI_PATH=$RFHTREE/18.0.532:&
PATH=$RMANTREE/bin:&
HOUDINI_DEFAULT_RIB_RENDERER=prman23.4
(i got the first 4 lines from here: https://rmanwiki.pixar.com/display/RFH23/Installation+of+RenderMan+for+Houdini)
(and borrowed the last 2 from here: https://www.youtube.com/watch?v=-SFiLA2Pqz4&feature=youtu.be&t=829&ab_channel=Houdini)


PLUS i also get this error while trying to launch the “renderman preset browser”
There is an error in the RenderMan Preset Browser script.

Traceback (most recent call last):
File “”, line 2, in
File “/opt/pixar/RenderManForHoudini-23.4/18.0.532/python2.7libs/rfh/preset_browser_houdini.py”, line 38, in
from prman import Version as prman_version
File “/opt/pixar/RenderManProServer-23.4/bin/prman.py”, line 45, in
class __private: # simple means to keep locals private
File “/opt/pixar/RenderManProServer-23.4/bin/prman.py”, line 70, in __private
libprman = ctypes.CDLL(file, ctypes.RTLD_GLOBAL)
File “/opt/houdini/hfs18.0.532/python/lib/python2.7/ctypes/__init__.py”, line 366, in __init__
self._handle = _dlopen(self._name, mode)
OSError: libtinfo.so.5: cannot open shared object file: No such file or directory

PS: i am trying out other renderers as well: namely redshift and Octane
PS: people have noted this here as well:
https://www.sidefx.com/forum/topic/72844/?page=1#post-311806 [www.sidefx.com]



thanks a lot for your time, i hope someone knows the solution

SreckoM
You just need to understand how hardware and software works. It will not change anything if you switch to Linux .

Hi,
Could you please elaborate on that a little more, or perhaps point to some resources where I can read/ learn more from the POV of utilization of max resources while doing sims in Houdini (especially flips/ fem).

Thanks
m.