Thanks for your answer. I'm very sorry but, tired of those disconnection, i unsinstalled Network-manager and install Wicd : no more trouble.
Guillaume -- very unstable wifi connection with network-manager https://bugs.launchpad.net/bugs/208819 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
