Calibre crashes Xserver on startup

[Hammerwell]

Hello,

I'm using Calibre with Kubuntu for some time now. But since some weeks Calibre crashes on startup and I'm back at the login screen. I think the Xserver is somehow affected. I do not know if calibre or Xserver is the reason. Other programs like firefox or okular etc. are working fine.
I started Calibre from the Konsole with script to get some clues but since I'm not a programmer it has not much meaning for me.
In the Codebox below you find the logged text.
Currently I'm using Kubuntu 12.10, I tried different desktops like Gnome and LXDE to no avail so it is probably on a deeper level.
If need to please point me to a useful crash report - I will happily post it here.

It would be great if somebody could provide some help or any ideas using VirtualBox for Calibre is annoying.

TIA
Hammerwell

Script wurde gestartet: Sa 23 Feb 2013 17:12:56 CET
Fontconfig warning: "/etc/fonts/conf.d/50-user.conf", line 9: reading configurations from ~/.fonts.conf is deprecated.
Traceback (most recent call last):
  File "site-packages/calibre/gui2/ui.py", line 129, in __init__
  File "site-packages/calibre/gui2/ui.py", line 143, in init_iaction
  File "site-packages/calibre/customize/__init__.py", line 567, in load_actual_plugin
  File "importlib/__init__.py", line 37, in import_module
  File "site-packages/calibre/customize/zipplugin.py", line 150, in load_module
  File "calibre_plugins.quality_check.action", line 21, in <module>
  File "site-packages/calibre/customize/zipplugin.py", line 150, in load_module
  File "calibre_plugins.quality_check.check_epub", line 19, in <module>
ImportError: No module named fix

macmenuhack file_path:/home/hammerwell/.config/calibre/plugins/fanfictiondownloader_macmenuhack.txt
calibre-gui: Fatal IO error: client killed

Script beendet: Sa 23 Feb 2013 17:13:01 CET

Also a part of Xorg.log.old that may hold some clues:

[  1049.759] (II) XKB: reuse xkmfile /var/lib/xkb/server-159587DAA527DE775D952329043688BF8A2D917D.xkm
[  1141.121] (EE) 
[  1141.121] (EE) Backtrace:
[  1141.121] (EE) 0: /usr/bin/X (xorg_backtrace+0x36) [0x7fbd54ff4b76]
[  1141.121] (EE) 1: /usr/bin/X (0x7fbd54e4c000+0x1ac9a9) [0x7fbd54ff89a9]
[  1141.121] (EE) 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7fbd54172000+0xfcb0) [0x7fbd54181cb0]
[  1141.121] (EE) 3: /usr/bin/X (doListFontsWithInfo+0x160) [0x7fbd54ea2470]
[  1141.121] (EE) 4: /usr/bin/X (ProcessWorkQueue+0x21) [0x7fbd54ea6131]
[  1141.121] (EE) 5: /usr/bin/X (WaitForSomething+0x62) [0x7fbd54ff1e72]
[  1141.121] (EE) 6: /usr/bin/X (0x7fbd54e4c000+0x557e1) [0x7fbd54ea17e1]
[  1141.121] (EE) 7: /usr/bin/X (0x7fbd54e4c000+0x4456a) [0x7fbd54e9056a]
[  1141.121] (EE) 8: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xed) [0x7fbd52df776d]
[  1141.121] (EE) 9: /usr/bin/X (0x7fbd54e4c000+0x448ad) [0x7fbd54e908ad]
[  1141.121] (EE) 
[  1141.121] (EE) Segmentation fault at address 0x7fe5f21706e0
[  1141.121] 
Fatal server error:
[  1141.121] Caught signal 11 (Segmentation fault). Server aborting
[  1141.121] 
[  1141.121] (EE)

[kovidgoyal]

calibre contains no code that talks to the x server directly. It uses Qt. The bug if there is one is somewhere between those two. That Xorg log appears to show the server crashing while listing fonts on your system. Look for newly added font files and remove them. Other than that, you're on your own.

[Hammerwell]

Thanks for Helping. I'll try that.

Hammerwell

[Hammerwell]

Working again after the last X-Server update yesterday.

\(*o*)/

---Edit---
That did work only until the next reboot.

But I found another solution here: http://ubuntuforums.org/showthread.php?t=1864672&page=2 And it works since then.

This is a problem with the nvidia installation and any Qt-Software. There is a wrong parameter set in the xorg.conf who is apparently also set automatically if there is no xorg.conf - as it was in my case.

just commenting out the following lines and restarting solved the problem:

Section "Files"
FontPath "unix/:7100"
EndSection