ImportError: cannot import name QImage on debian 7

[perler]

it looks a bit like #1247315 but the solution there doesn't help.

after upgrading to the latest release of calibre, when starting I get:

Starting Calibre
Traceback (most recent call last):
  File "site.py", line 64, in main
  File "site-packages/calibre/library/server/main.py", line 12, in <module>
  File "site-packages/calibre/library/server/base.py", line 21, in <module>
  File "site-packages/calibre/library/server/content.py", line 14, in <module>
  File "site-packages/calibre/utils/img.py", line 10, in <module>
ImportError: cannot import name QImage

[Eli Schwartz (eschwartz)]

In what way does the solution there not help? It is the same theory, but with a different import.

LD_DEBUG=libs calibre-debug -c "from PyQt5.Qt import QImage"

[perler (perler)]

I simply tried deleting libz.so.1

$LD_DEBUG=libs calibre-debug -c "from PyQt5.Qt import QImage"

brings

bash: =libs: command not found

I am not sure what to do here

[Eli Schwartz (eschwartz)]

Well, obviously deleting a file that was outdated two years and 96 versions ago (and was long since fixed) is not going to fix anything...

And why on earth are you using the commandline (now where did that dollar sign come from):
$LD_DEBUG=libs calibre-debug -c "from PyQt5.Qt import QImage"

No one told you to use that, you were told to use:
LD_DEBUG=libs calibre-debug -c "from PyQt5.Qt import QImage"

...
...

A tip on shell command syntax:

LD_DEBUG=libs sets the desired variable LD_DEBUG to "libs"
$LD_DEBUG=libs first expands the value of $LD_DEBUG (which is nothing) and translates to "=libs" which is *not* valid bash syntax for setting a variable, and sure as heck isn't a command either, hence your "command not found" error.

Moral of the story -- when you know why the command you were given is wrong, then and only then should you try to "fix" it. ;)

[perler (perler)]

..attached is the log file. the server is headless btw.

[Kovid Goyal (kovid)]

You are missing the X libraries in this case libGL.so which Qt needs and
calibre does not bundle. Note that you only need to have the libraries
installed, not a running X instance.

 status invalid

[perler (perler)]

ok, I had to install

apt-get install libgl1-mesa-glx

on debian 7. but this wasn't necessary until recently.

[James Biederbeck (jbiederbeck)]

I'm experiencing the same issue, and found this page on google. Clean ubuntu 14.04 install on a vps, and all other software should be up to date.

I guess this raises the question, why should I need X if I'm running headless, and using calibre on the command line?

[Eli Schwartz (eschwartz)]

> I guess this raises the question, why should I need X if I'm running
> headless, and using calibre on the command line?

Um, because Qt headless plugins require the X libraries in order to use
X headlessly? What kind of question is that???

And, you did read the FAQ, right?
https://manual.calibre-ebook.com/faq.html#how-do-i-run-parts-of-calibre-like-news-download-and-the-content-server-on-my-own-linux-server