(This is really a question for the chimerax-users mailing list, not the chimera-users one.)

If you can wait a week or so, I'll have a ChimeraX .deb package for Ubuntu 16.04 (and another for 18.04).

But to answer your question, you do not need a system-wide replacement of Qt5.  libQt5core.so.5 is in CHIMERAX/lib/python3.6/site-packages/PyQt5/Qt/lib/libQt5Core.so.5, where CHIMERAX is where ChimeraX was installed.  So add that directory to the LD_LIBRARY_PATH environment variable and rerun ldd on libqxcb.so.  And please let me know what you find out so I can make sure the .deb package avoids that problem.

    Regards,

    Greg

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):

  File "/usr/local/lbbs/chimerax/current/lib/python3.6/site-packages/chimerax/ui/gui.py", line 93 in __init__

  File "/usr/local/lbbs/chimerax/current/lib/python3.6/site-packages/ChimeraX_main.py", line 485 in init

  File "/usr/local/lbbs/chimerax/current/lib/python3.6/site-packages/ChimeraX_main.py", 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 found

/usr/lib/x86_64-linux-gnu/libQt5Gui.so.5: version `Qt_5' not found

/usr/lib/x86_64-linux-gnu/libQt5Gui.so.5

Do I need to do a system-wide replacement of Qt5 for a different flavor (OpenGLES)?

Thanks,

Petr

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