It doesn't seem a NetworkManager issue, but it might be an unstable cable connection, since I saw several messages of link and bridge down an instant and up soon after (or vice versa)
jun 26 19:27:37 hermes kernel: wlp3s0: authenticated jun 26 19:27:37 hermes kernel: wlp3s0: associate with 08:17:35:32:e7:13 (try 1/3) jun 26 19:27:37 hermes NetworkManager[1143]: <info> [1498498057.9350] device (wlp3s0): supplicant interface state: authenticating -> associating jun 26 19:27:37 hermes wpa_supplicant[1562]: wlp3s0: Associated with 08:17:35:32:e7:13 jun 26 19:27:37 hermes kernel: wlp3s0: RX AssocResp from 08:17:35:32:e7:13 (capab=0x431 status=0 aid=2) jun 26 19:27:37 hermes kernel: wlp3s0: associated jun 26 19:27:37 hermes NetworkManager[1143]: <info> [1498498057.9452] device (wlp3s0): supplicant interface state: associating -> 4-way handshake jun 26 19:27:37 hermes wpa_supplicant[1562]: wlp3s0: WPA: Key negotiation completed with 08:17:35:32:e7:13 [PTK=CCMP GTK=CCMP] jun 26 19:27:37 hermes wpa_supplicant[1562]: wlp3s0: CTRL-EVENT-CONNECTED - Connection to 08:17:35:32:e7:13 completed [id=0 id_str=] jun 26 19:27:37 hermes NetworkManager[1143]: <info> [1498498057.9507] device (wlp3s0): supplicant interface state: 4-way handshake -> completed jun 26 19:27:37 hermes kernel: bridge-wlp3s0: down jun 26 19:27:37 hermes kernel: bridge-wlp3s0: detached and several jun 26 19:39:20 hermes kernel: wlp3s0: Limiting TX power to 17 dBm as advertised by 08:17:35:32:e7:13 jun 26 19:39:21 hermes kernel: userif-2: sent link down event. jun 26 19:39:21 hermes kernel: userif-2: sent link up event. It might be a long shot, but have you tried changing usb cable and/or usb port? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1700621 Title: System freezes and crashes when enabling USB network To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1700621/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
