Calibre server issue on Debian 11.4 (Bullseye)

[avantman42]

I'm having trouble running Calibre server on my Debian 11.4 Bullseye system. I've installed the official binaries using the instructions at https://calibre-ebook.com/download_linux

But when I start calibre-server I get this error:

Failed to import PyQt module: PyQt6.QtGui with error: libEGL.so.1: cannot open shared object file: No such file or directory
Traceback (most recent call last):
  File "runpy.py", line 196, in _run_module_as_main
  File "runpy.py", line 86, in _run_code
  File "site.py", line 45, in <module>
  File "site.py", line 41, in main
  File "calibre/srv/standalone.py", line 227, in main
  File "calibre/srv/standalone.py", line 69, in __init__
  File "calibre/srv/handler.py", line 200, in __init__
  File "importlib/__init__.py", line 126, in import_module
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "bypy-importer.py", line 279, in exec_module
  File "calibre/srv/ajax.py", line 18, in <module>
  File "bypy-importer.py", line 279, in exec_module
  File "calibre/srv/content.py", line 16, in <module>
  File "bypy-importer.py", line 279, in exec_module
  File "calibre/ebooks/covers.py", line 14, in <module>
ImportError: cannot import name 'QImage' from 'qt.core' (/opt/calibre/lib/calibre-extensions/python-lib.bypy.frozen/qt/core.pyc)

My first thought was to install the PyQt6 package, but there doesn't appear to be one available for Debian 11.4.

Any ideas?

[kovidgoyal]

You are likely missing one the needed system libraries, see the notes at: https://calibre-ebook.com/download_linux

[beedaddy]

Failed to import PyQt module: PyQt6.QtGui with error: libEGL.so.1: cannot open shared object file: No such file or directory

Try installing the libegl1 package.

[avantman42]

Originally Posted by beedaddy

Try installing the libegl1 package.

Installing that and the libopengl0 package fixed the issue.

Thanks both.

For reference, in case it helps anyone with a similar issue, this seems to have started with calibre v6.0.0. It had been working happily for over a year when this happened.

[JSWolf]

Originally Posted by avantman42

Installing that and the libopengl0 package fixed the issue.

Thanks both.

For reference, in case it helps anyone with a similar issue, this seems to have started with calibre v6.0.0. It had been working happily for over a year when this happened.

Calibre 6 is now using Qt6. New Qt new dependencies.

[avantman42]

Originally Posted by JSWolf

Calibre 6 is now using Qt6. New Qt new dependencies.

I hadn't realised that. I haven't been following calibre releases, the server updates itself automatically.

[theducks]

Originally Posted by avantman42

I hadn't realised that. I haven't been following calibre releases, the server updates itself automatically.

That is not a Calibre default mode.
This is a reason to distrust Auto-incorrect.
How hard is it to review the 'whats New' and run the update?
Server does not use plugins or those would be an Manual issue on top of everything else.

[avantman42]

Originally Posted by theducks

How hard is it to review the 'whats New' and run the update?
Server does not use plugins or those would be an Manual issue on top of everything else.

I was lazy Lesson learned.

[theducks]

Originally Posted by avantman42

I was lazy Lesson learned.

Call me old fashioned... Paranoid.... I want to KNOW what the dog and kids and Server are up to (I already know that I really don't want to know, what the Cat is doing ).

Most of the time, I update Calibre just to see what Kovid brings us as a new toy (and to be aware to help with possible issues, here on these forums).

Another thing to consider in your case (server only): That part of the package rarely changes, so updates that do happen are to fix edge case issues. The one case an update is needed if Kovid makes a DB structural change (the server must be able to use the DB you sent from your PC).

[avantman42]

Originally Posted by theducks

Another thing to consider in your case (server only): That part of the package rarely changes, so updates that do happen are to fix edge case issues. The one case an update is needed if Kovid makes a DB structural change (the server must be able to use the DB you sent from your PC).

That's useful to know, thanks.

[JSWolf]

Originally Posted by theducks

Call me old fashioned... Paranoid.... I want to KNOW what the dog and kids and Server are up to (I already know that I really don't want to know, what the Cat is doing ).

Most of the time, I update Calibre just to see what Kovid brings us as a new toy (and to be aware to help with possible issues, here on these forums).

Another thing to consider in your case (server only): That part of the package rarely changes, so updates that do happen are to fix edge case issues. The one case an update is needed if Kovid makes a DB structural change (the server must be able to use the DB you sent from your PC).

No cat (yeah). But I do want to know what the dog and wife are up to. As for auto-updates, I prefer Calibre updates the way they are done (manually). Then I can install if I want and when it's convenient to me.

For example, I'm not installing Calibre 6.0. But I will install the next release with the fixes in place.