Got such error by running: nazar-pc@nazar-pc:~$ sudo synaptic fcntl error fcntl error
** Package changed: gksu (Ubuntu) => sudo (Ubuntu) ** Changed in: sudo (Ubuntu) Status: Invalid => Confirmed -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gksu in Ubuntu. https://bugs.launchpad.net/bugs/1321704 Title: fcntl error with gksu Status in “sudo” package in Ubuntu: Confirmed Bug description: I'm using Ubuntu 14.10 dev with gksu 2.0.2-6ubuntu2 and after making today a dist-upgrade I'm getting the following error if I want to start gksu: sworddragon@ubuntu:~$ gksu pcmanfm ** (gksu:1849): CRITICAL **: fcntl error ** (gksu:1849): WARNING **: Lock taken by pid: -1. Exiting. Edit: Downgrading linux-image-generic from version 3.15.0.1.2 0 to version 3.13.0.24.29 0 fixes the issue. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sudo/+bug/1321704/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp