[Chimera-users] ChimeraX won't start on Ubuntu 16.04

Petr Leiman petr.leiman at gmail.com
Thu Jun 21 10:34:24 PDT 2018

Dear ChimeraX users and Developers,

ChimeraX v. 0.5 or 0.6 would not start on our stock Ubuntu 16.04 machines.
The error message is as follows:

This application failed to start because it could not find or load the Qt
platform plugin "xcb"
in "".

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl,
offscreen, vnc, xcb.

Reinstalling the application may fix this problem.
Fatal Python error: Aborted

Current thread 0x000014f406ce7740 (most recent call first):
line 93 in __init__
line 485 in init
line 788 in <module>
  File "/usr/local/lbbs/chimerax/current/lib/python3.6/runpy.py", line 85
in _run_code
  File "/usr/local/lbbs/chimerax/current/lib/python3.6/runpy.py", line 193
in _run_module_as_main
Aborted (core dumped)

A few more errors while checking for missing libraries (ldd) of
ChimeraX-supplied libqxcb.so, libqxcb-glx-integration.so
or libqxcb-egl-integration.so
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5: version `Qt_5.9' not found
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5: version `Qt_5' not found
/usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5: version `Qt_5_PRIVATE_API' not
/usr/lib/x86_64-linux-gnu/libQt5Gui.so.5: version `Qt_5' not found

Do I need to do a system-wide replacement of Qt5 for a different flavor


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