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 Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1700621 Title: System freezes and crashes when enabling USB network Status in linux package in Ubuntu: Confirmed Bug description: I have my Android (Google pixel) attached via USB cable. Now I want to use the network from the android using USB. So (on the android device) I turn on "Network sharing via USB" and boom my ubuntu crashes and I find "BUG: stack guard page was hit at ffffb691c54981c0 (stack is ffffb691c5494000..ffffb691c5497fff)" in /var/log/kern.log It is 100% reproducible every time. ProblemType: Bug DistroRelease: Ubuntu 17.04 Package: linux-image-4.10.0-24-generic 4.10.0-24.28 ProcVersionSignature: Ubuntu 4.10.0-24.28-generic 4.10.15 Uname: Linux 4.10.0-24-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia ApportVersion: 2.20.4-0ubuntu4.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: jarl 2901 F.... pulseaudio /dev/snd/controlC0: jarl 2901 F.... pulseaudio CurrentDesktop: KDE Date: Mon Jun 26 19:39:37 2017 HibernationDevice: RESUME=UUID=62c8a911-b76d-4691-9ffe-019c5aef1c88 InstallationDate: Installed on 2016-01-08 (534 days ago) InstallationMedia: Kubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) MachineType: System76, Inc. Oryx Pro ProcFB: 0 EFI VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-24-generic.efi.signed root=UUID=77b926b9-e936-4d48-a883-a4690b36dac0 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.10.0-24-generic N/A linux-backports-modules-4.10.0-24-generic N/A linux-firmware 1.164.1 SourcePackage: linux UpgradeStatus: Upgraded to zesty on 2017-04-19 (67 days ago) dmi.bios.date: 02/02/2016 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1.05.13RSA1 dmi.board.asset.tag: Tag 12345 dmi.board.name: Oryx Pro dmi.board.vendor: System76, Inc. dmi.board.version: orxp1 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: System76, Inc. dmi.chassis.version: N/A dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.05.13RSA1:bd02/02/2016:svnSystem76,Inc.:pnOryxPro:pvrorxp1:rvnSystem76,Inc.:rnOryxPro:rvrorxp1:cvnSystem76,Inc.:ct10:cvrN/A: dmi.product.name: Oryx Pro dmi.product.version: orxp1 dmi.sys.vendor: System76, Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1700621/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
