So, taking a look at your /etc/group file, there are a few oddities. Wireshark is doing the Right Thing here, as forcing the removal of the wireshark group would likely leave you unable to log in.
I assume that you were doing some manual group manipulation to try and get capture to work without sudo? You've ended up with a user-level (ID >= 1000) wireshark group (it should be ID 125 or thereabouts). You've also ended up no longer in your own user group (bibinou:x:1000: is empty, but you should be in it). You'll have to reset your primary group back to bibinou. Then the wireshark group should be empty, and you can manually run groupdel to remove the wireshark group. The wireshark package will then successfully uninstall. I'm marking the bug invalid, since it's not an actual bug, but feel free to reply with any further questions and I'll try and get your system sorted out. Cheers, Evan ** Changed in: wireshark (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1025337 Title: Wireshark couldn't delete the wireshark group : package wireshark- common 1.6.7-1 failed to install/upgrade: le sous-processus script post-removal installé a retourné une erreur de sortie d'état 128 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/wireshark/+bug/1025337/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs