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Accepted
Daniel Holm
Asked: 2013-05-14 03:46:00 +0800 CST

QtCreator wont start anymore. Symbol lookup error

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Since yesterday I'm unable to start QtCreator. Trying to start QtCreator from terminal gives me this error message, which I haven't found anything on:

qtcreator: symbol lookup error: /usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so: undefined symbol: _ZN15QPlatformWindow17formatWindowTitleERK7QStringS2_

Any ideas what this is about?

Running Ubuntu 13.04 with qt5-edgers ppa for both Ubuntu SDK and Qt.

Version of QtCreator: 2.7.0-0ubuntu4~raring1~test5

13.04

2 Answers

  1. The problem happens rarely but is related to upgrading from for example the archive version of ubuntu-sdk, or maybe some more complex upgrade path. The root problem is currently unknown, but removing and reinstalling Qt 5 seems to work.

    1. Remove libqt5core5 package, to remove most of the Qt 5
    2. Install ubuntu-sdk package to get the Qt 5 and the rest of the Ubuntu SDK back.
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  2. Best Answer

    Somehow it seemed like I had two Qt versions installed (thanks hakermania). After I've removed all Qt4 stuff and reinstalled Ubuntu SDK and QtCreator (again) it worked.

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