Calibre 5.0.1 Could not load the Qt platform plugin "xcb" FIXED

[redbeard5598]

Originally Posted by JSWolf

Don't use your Linux suppository for anything at all Calibre related. Most Linux suppositories BOTCH Calibre big time. Go to the official Calibre website and get it from there.

Installed from the website (the one-line console command), and have the same issue.
The exact same one; here's the text after running Calibre from the command line post-install:

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, xcb.

Aborted (core dumped)
r@ubuntu:~$ apt-get install libxcb-xinerama0

What do I need to install? None of the ones listed there are in the default repositories (at least, the ones that shipped with apt in Lubuntu 18.04. I just reinstalled the system, so everything is fairly clean. Lubuntu 18 because 20 wouldn't install (at least on my machine, it wouldn't). Upgrades are wonderful, right? But platform plugin sounds like I need to install QT itself, which is no big deal (I usually have it on my machines, just not on this one yet).

[kauesedrez]

Hi everyone, to solve the problem I uninstalled Calibre

sudo calibre-uninstall

and then just run

sudo apt-get install calibre.

Everything works like a charm.

[theducks]

We really do NOT recommend the repository version (what apt-get grabs).
Use the commandline on the Calibre Linux download page

[ckronengold]

Installed Calibre on ubuntu 20.04 from the copy/paste install on the calibre website and it failed to run.

Per the dev's post, I installed libxcb-xinerama0, but already had the latest version.

Then I tried apt-get install libxcb* and calibre failed to run. Tried apt-get install qt5* and still no luck.

Did the "isolated" install and also failed to run with the same error.

The link to this thread from the install page is now almost 6 months old. This issue still hasn't been definitely resolved?

[gbm]

Originally Posted by ckronengold

Installed Calibre on ubuntu 20.04 from the copy/paste install on the calibre website and it failed to run.

Per the dev's post, I installed libxcb-xinerama0, but already had the latest version.

Then I tried apt-get install libxcb* and calibre failed to run. Tried apt-get install qt5* and still no luck.

Did the "isolated" install and also failed to run with the same error.

The link to this thread from the install page is now almost 6 months old. This issue still hasn't been definitely resolved?

Try:

apt-get install libxcb-randr0

bernie

[ckronengold]

Originally Posted by gbm

Try:

apt-get install libxcb-randr0

bernie

libxcb-randr0 is already the newest version (1.14-2).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

I think there needs to be an update to the installation instructions. I was doing my install via SSH on my laptop because I was too lazy to go downstairs and sit at the server. As soon as I logged on to the server directly, running calibre in the terminal immediately launched the GUI.

I don't know what any of those dependencies are, but I'm guessing something has to do with the display driver?

I'm going to uninstall everything and re-install directly on the machine and hopefully get a clean install.

[technicaltitch]

I also had problems after installing and updating every package on this thread, including qt-default, using the command line on the website, without `sudo -v` as my admin account has no password (maybe this is why my installer couldn't reach qt5 even after I'd installed it?).

Anyway, these were the lines that worked in the end - install everything mentioned on this thread (I did try with less), then run the isolated install:

sudo apt-get unstall libxcb-xinerama0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-render-util0 libxcb-randr0 qt5-default

wget -nv -O- https://download.calibre-ebook.com/linux-installer.sh | sh /dev/stdin install_dir=~/calibre-bin isolated=y

I defer to Kovid's opinion of course, but I would have thought an AWS Ubuntu install would be useful on the installer page? Or maybe I'm rare.

[tmv]

Hello people, I'm using Ubuntu 22.04 LTS default installation fresh with almost zero packages extra installed, I tried installing calibre using the download command from the website and the error

Could not load the Qt platform plugin xcb

followed this link and installing some packages reccomended it solved that message but calibre still doesn't work, I've tried what here appear the problem is that message appear if you run in from the terminal:

Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.

and the most important if that I try to use the book viewer it crashes and says that Qt WebEngine Render has closed and the terminal shows this:

Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
The Qt WebEngine Render process crashed with termination type: 2 and exit code: 159
Restarting Qt WebEngine
The Qt WebEngine Render process crashed with termination type: 2 and exit code: 159
The Qt WebEngine Render process crashed too often

Any help please?

[kovidgoyal]

Your first problem is a warning that is irrelevant and can be ignored. As for your viewer not working google qt webengine glibc sandbox disable and you will find the answer.

[SickProdigy]

Have ran
sudo apt install libxcb-randr0
sudo apt install xcb
sudo apt install libxcb-xinerama0

Still getting
qt.qpa.xcb: could not connect to display
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, xcb.

Aborted (core dumped)

--

My deduction seems to be you cant do this on a headless server?
Or you can't run "calibre" in console on a headless server i mean.

Still can't quite figure out how to get this working on headless linux server. Using ubuntu 20.xx

[kovidgoyal]

calibre is a GUI program it is meaningless to run it on a headless server. Use one of th emany CLI tools calibre comes with on a headless server.

[JonhBS]

Originally Posted by SickProdigy

Have ran
sudo apt install libxcb-randr0
sudo apt install xcb
sudo apt install libxcb-xinerama0

Still getting
qt.qpa.xcb: could not connect to display
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, xcb.

Aborted (core dumped)

--

My deduction seems to be you cant do this on a headless server?
Or you can't run "calibre" in console on a headless server i mean.

Still can't quite figure out how to get this working on headless linux server. Using ubuntu 20.xx

Hello everyone.

I recently did a fresh Xubuntu 22.04 installation and at the moment to install and run calibre (last version 6.0 following the instructions from calibre's webpage) I got the same error message: "qt.qpa.plugingCould not load the Qt platform plugging xcb..."

After install the xcb libraries as you recommended in this topic I still got the same error message.

The solution that works for me:
I remove calibre with the calibre-uninstall command. Then previously having installed the xcb libraries I also installed an app from the repositories that use qt libraries (for example kalzium). After that I installed again calibre from the calibre's webpage and it works perfectly.

I hope it helps someone!!

Thanks for your support. Best regards

[Onemack]

Originally Posted by JonhBS

I hope it helps someone!!

Thanks heaps, very helpful, solved my problem after days of trial and error, now I've got to try and install my library of ebooks which are on the windows version !

[indigo141]

Thank you JohnBS this surpisingly helped me install ver 6.1. I wonder how many people will be getting around with a periodic tables app. What worked for me:
Code posted by Bernie here Ran the code got some errors about Qt. Found this thread. Installed Kalzium from raspian add/remove software. Re-ran code without uninstalling the first failed install. Second install appears to be working well. This is on a Raspberry Pi 400 with Raspian desktop 64-bit

[indigo141]

As far as i can tell, another way provided here avoids the use of Kalzium with code: "sudo apt install libegl1 libopengl0" . I havnt tried it myself.