I have this bug too. The connection seems up but there isn't data transfers (for example no DNS lookup). This occuor after some random time.
After minutes I have this in my dmesg: [ 1625.246976] ieee80211 phy0: channel change: 2427 -> 2432 failed (3). Info on carl9170 config: [ 843.389952] usb 1-2: driver API: 1.9.4 2011-08-15 [1-1] [ 843.389960] usb 1-2: firmware API: 1.9.5 2012-03-14 My workaround for reactivate the connection is turn off the device and turn on: sudo rfkill block 0 && sudo rfkill unblock 0 ** Changed in: linux (Ubuntu) Status: Incomplete => New ** Changed in: linux (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/999852 Title: carl9170 driver - network connection breaks To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/999852/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs