symbol lookup error when launching okular

[Bernard François]

Binary package hint: kdegraphics

I just installed okular in ubuntu 9.04 (under gnome).

When I run it, nothing happens.

When I run it from a terminal, I get the following output:

ber@ubuntu:~$ okular
okular: symbol lookup error: /usr/lib/libQtDBus.so.4: undefined symbol: _ZN14QObjectPrivate15checkWindowRoleEv

Note that I had a similar issue with the subcommander package yesterday; there the same undefined symbol occurs in the /usr/lib/libQtNetwork.so.4 library.

Note that I used the 'ubuntu-bug' tool to report this bug, and that it automatically suggested to report this bug for the 'kdegraphics' package instead of the 'okular' package.

I seems like there's an incompatibility between the version of Qt in the repositories and some packages using Qt.

ProblemType: Bug
Architecture: i386
DistroRelease: Ubuntu 9.04
NonfreeKernelModules: nvidia
Package: okular 4:4.2.2-0ubuntu2
ProcEnviron:
 PATH=(custom, no user)
 LANG=C
 SHELL=/bin/bash
SourcePackage: kdegraphics
Uname: Linux 2.6.28-6-386 i686

[Terence Simpson (tsimpson)]

This is most likely due to you having another third-party install of the Qt4 libraries installed. Can you post the output of the following console commands:

which okular

ldd $(which okular)

[Bernard François (bernardfrancois-gmail)]

Here you go... (see attachment).

I don't think I ever installed version of the Qt4 libraries by downloading and installing a .deb or other package, or by compiling from source.

[Jonathan Thomas (echidnaman)]

It seems a local Qt installation has crept in somehow:
libQtCore.so.4 => /usr/local/lib/libQtCore.so.4 (0xb7315000)
libQtGui.so.4 => /usr/local/lib/libQtGui.so.4 (0xb6ade000)

There's nothing we can do to fix this bug, but we can turn it into a question so that you can get support. Hope everything works out for you.

[mpaq (mipaquet)]

Hi,

Exactly the same bug when trying to load Krusader or Smile....

Reading your explanation I've renamed /usr/local/lib/libQtCore.so.4 as /usr/local/lib/libQtCore.so.4.old
and /usr/local/lib/libQtGui.so.4 as /usr/local/lib/libQtGui.so.4.old
Then I've created new simlinks from /urs/lib in /usr/local/lib for those both files.

From there it's working now.

I've no idea of what bloody install have created those to files in /usr/local/lib.

Best regards

Michel

[Bernard François (bernardfrancois-gmail)]

That's also how I installed it. I also have no idea how those files got there. It only happens very occasionally that I install software without using the package manager.

This bug report got actually converted into a question, which can be found here:
https://answers.launchpad.net/ubuntu/+source/kdegraphics/+question/74903

[Bernard François (bernardfrancois-gmail)]

> That's also how I installed it.

I mean, that's how I fixed the problem. It's still morning here... :-)