Thread: Calibre 5.0.1 Could not load the Qt platform plugin "xcb" FIXED
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Old 09-26-2020, 09:27 PM   #4
gbm
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Quote:
Originally Posted by brown131 View Post
I upgraded to Calibre 5.0.1 on a Ubuntu 14.4 LTS system, and got this error when I tried starting calibre:

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.

Reinstalling libxkbcommon-x11-0 did not help. To fix it, I first did "export QT_DEBUG_PLUGINS=1" This allowed me to see what the missing libraries were. I then looked them up one at a time at https://packages.ubuntu.com to see what package they belonged to.

I found that I needed to manually install the following apt packages:
libxcb-xinerama0
libxcb-icccm4
libxcb-image0
libxcb-keysyms1
libxcb-render-util0

I hope others find this helpful.
I highly recommend that you upgrade to an OS that is not long past it's end of life date.

bernie
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