Calibre Won't Start on Debian

[lewisdale]

I installed Calibre 5.12 on Debian using apt install but Calibre won't start. I frankly don't understand the traceback shown below.

calibre --ignore-plugins
Traceback (most recent call last):
File "/usr/bin/calibre", line 19, in <module>
from calibre.gui_launch import calibre
File "/usr/lib/calibre/calibre/__init__.py", line 23, in <module>
initialize_calibre()
File "/usr/lib/calibre/calibre/startup.py", line 104, in initialize_calibre
set_translators()
File "/usr/lib/calibre/calibre/utils/localization.py", line 268, in set_translators
lang = get_lang()
File "/usr/lib/calibre/calibre/utils/localization.py", line 90, in get_lang
from calibre.utils.config_base import prefs
File "/usr/lib/calibre/calibre/utils/config_base.py", line 13, in <module>
from calibre.utils.lock import ExclusiveFile
File "/usr/lib/calibre/calibre/utils/lock.py", line 16, in <module>
from calibre_extensions import speedup
ImportError: cannot import name 'speedup' from 'calibre_extensions' (unknown location)

What is Calibre trying to tell me?

[DNSB]

I'd suggest trying the calibre installer from calibre-ebook.com instead of the repository version.

I've played with calibre on Linux and other than Arch, most of the repository versions are
outdated, don't come with all the prerequisites or are buggy. Often all three. At the least with the official version, you can get some help.

[lewisdale]

Latest Calibre requires QT6. Although debian is now 64bit it is still using QT5 so the latest Calibre linux package won't run on any raspberry pi.

[Quoth]

5.44.0 is on the Calibre site. It's the last QT5 version.
See instructions for installing ANY older version for any Debian, though maybe it's only x86 and x86-64. The Pi is ARM based.

[gbm]

As has been pointed out before go to:
https://calibre-ebook.com/download_linux

Use the command:

sudo -v && wget -nv -O- https://download.calibre-ebook.com/linux-installer.sh | sudo sh /dev/stdin

That will install the ARM64 version--at this time 6.2.1-- of calibre, this is the official and only ARM version of calibre that is supported.

Now the question is are you running a 64bit PI and OS.

bernie

P.S. calibre uses it own build of QT now the system build.

Originally Posted by lewisdale

I installed Calibre 5.12 on Debian using apt install but Calibre won't start. I frankly don't understand the traceback shown below.

calibre --ignore-plugins
Traceback (most recent call last):
File "/usr/bin/calibre", line 19, in <module>
from calibre.gui_launch import calibre
File "/usr/lib/calibre/calibre/__init__.py", line 23, in <module>
initialize_calibre()
File "/usr/lib/calibre/calibre/startup.py", line 104, in initialize_calibre
set_translators()
File "/usr/lib/calibre/calibre/utils/localization.py", line 268, in set_translators
lang = get_lang()
File "/usr/lib/calibre/calibre/utils/localization.py", line 90, in get_lang
from calibre.utils.config_base import prefs
File "/usr/lib/calibre/calibre/utils/config_base.py", line 13, in <module>
from calibre.utils.lock import ExclusiveFile
File "/usr/lib/calibre/calibre/utils/lock.py", line 16, in <module>
from calibre_extensions import speedup
ImportError: cannot import name 'speedup' from 'calibre_extensions' (unknown location)

What is Calibre trying to tell me?

[JSWolf]

Originally Posted by lewisdale

What is Calibre trying to tell me?

Calibre is trying to tell you to never ever use a Linux repository for anything ever again.

[lewisdale]

Thanks kind user as Calibre finally installed and ran correctly.