So I was able to reproduce this problem with a fresh install of Debian 10. The ldd found the bug, libxcb-util.so.1 is missing. And Debian 10 does not have the libxcb-util1 package, only libxcb-util0. So I downloaded libxcb-utils1_0.4.0-1+b1_amd64.deb from https://packages.debian.org/bullseye/amd64/libxcb-util1/download, installed it, and then chimerax works. As an aside, you really should be using Ubuntu instead of Debian for a desktop graphics system. Debian stable is a good reliable Linux distribution for a server, but is way behind the times for desktop graphics. In particular, the AMD and Intel open-source drivers are much better in Ubuntu and get bug fixes more often. -- Greg On 1/25/2022 6:38 PM, Greg Couch via ChimeraX-users wrote:
The nugget of good news was that you were able to install ChimeraX using apt-get. That means all of the dependencies we currently know about were installed. So the problem is probably that either (A) you need to update your graphics driver or (B) that we missed a dependency.
For (A) we recommend the proprietary Nvidia driver if you have Nvidia graphics, or the open-source drivers if you have AMD or Intel graphics. Please send me the output from "lspci | grep VGA" so I can see what graphics device(s) you have.
For (B), please send me the output from running:
ldd /usr/lib/ucsf-chimerax/lib/python3.9/site-packages/PyQt5/Qt/plugins/platforms/libqxcb.so
If there is a line that says "not found", then we have found the missing dependency, and I can add it to future deb packages so other people don't have this problem. But there could be other errors that show up.
-- Greg
On 1/22/2022 12:30 PM, Martin Urban via ChimeraX-users wrote:
Dear ChimeraX users,
I have a problem with the installation of ChimeraX under Debian 10 buster.
I downloaded the ucsf-chimerax_1.3ubuntu18.04_amd64.deb from the official website. I installed it one time with: /sudo dpkg -i //ucsf-chimerax_1.3ubuntu18.04_amd64.deb /and also with /sudo apt-get install .///ucsf-chimerax_1.3ubuntu18.04_amd64.deb./ Both times I get the same error message:
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.
The full error message is as attachment in this mail.
I searched the web for an answer and came up with three entries of this mailing list. I followed the described way in these mails, but nothing worked for me (1st mail: https://www.rbvi.ucsf.edu/pipermail/chimerax-users/2021-October/002797.html; 2nd mail: https://www.rbvi.ucsf.edu/pipermail/chimerax-users/2021-October/002770.html; 3rd mail: https://www.rbvi.ucsf.edu/pipermail/chimerax-users/2021-June/002339.html)
Do you have an answer or a solution to my problem?
Greetings from Germany
-- Martin
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