Fresh 16.04.1 install on ThinkPad X1 carbon 3 with stock Intel 7265 (802.11abgn) WiFi here; laptop also has a Sierra Wireless EM7345 4G LTE WWAN integrate USB module.
Typical scenario: I use the WWAN when out and about, suspend the laptop, come back to office and expect the laptop to re-connect to WiFi. Typically the WWAN reconnects but the network mgr applet shows a stale list of WiFi access points (looks like they're from when I last suspended the laptop). Kern.log has below notices after resume from sleep regarding the WLAN adapter [1] I tried the following (several times in a row) from the above suggestions to restore my connection (in assumed descending order of "invasion"): 1. sudo wpa_cli scan 2. sudo rfkill block wifi; sleep 3; rfkill unblock wifi 3. sudo systemctl restart network-manager.service #3 did it this time but there was definitely a previous occurrence where it didn't help and only a reboot did. Just in case this helps shed some light on this lengthy thread. Would agree that this isn't Ubuntu's finest hour; sorry I cannot be more constructive. [1] ken.log Jan 6 10:31:49 cinamon5u NetworkManager[1270]: <info> [1483695109.4803] device (wlp4s0): state change: unmanaged -> unavailable (reason 'managed') [10 20 2] Jan 6 10:31:49 cinamon5u kernel: [ 3239.333883] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready Jan 6 10:31:49 cinamon5u kernel: [ 3239.432191] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready Jan 6 10:31:49 cinamon5u NetworkManager[1270]: <info> [1483695109.8678] device (wlp4s0): supplicant interface state: starting -> ready Jan 6 10:31:49 cinamon5u NetworkManager[1270]: <info> [1483695109.8679] device (wlp4s0): state change: unavailable -> disconnected (reason 'supplicant-available') [20 30 42] Jan 6 10:31:49 cinamon5u kernel: [ 3239.721341] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready Jan 6 10:33:19 cinamon5u NetworkManager[1270]: <info> [1483695199.5763] device (wlp4s0): state change: disconnected -> unavailable (reason 'none') [30 20 0] Jan 6 10:33:23 cinamon5u kernel: [ 3333.131109] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready Jan 6 10:33:23 cinamon5u NetworkManager[1270]: <info> [1483695203.3310] device (wlp4s0): supplicant interface state: starting -> ready Jan 6 10:33:23 cinamon5u NetworkManager[1270]: <info> [1483695203.3311] device (wlp4s0): state change: unavailable -> disconnected (reason 'supplicant-available') [20 30 42] Jan 6 10:33:23 cinamon5u kernel: [ 3333.175963] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/1585863 Title: WiFi malfunction after suspend & resume stress - sudo wpa_cli scan required to fix it. Status in OEM Priority Project: New Status in OEM Priority Project xenial series: New Status in network-manager package in Ubuntu: Confirmed Bug description: Description: Ubuntu Yakkety Yak (development branch) Release: 16.10 Packages: libnm-glib-vpn1:amd64 1.2.2-0ubuntu2 libnm-glib4:amd64 1.2.2-0ubuntu2 libnm-util2:amd64 1.2.2-0ubuntu2 libnm0:amd64 1.2.2-0ubuntu2 network-manager 1.2.2-0ubuntu2 Reproduce steps: 1. Install fwts by `sudo apt-get install fwts`. 2. Run the suspend & resume stress test. sudo fwts s3 --s3-multiple=30 --s3-min-delay=5 --s3-max-delay=5 --s3-delay-delta=5 Expected result: The WiFi still functioned. Actual result: The WiFi can not connect to any access point and we have to execute `sudo wpa_cli scan` manually to make it work again. P.S. Ubuntu 16.04 also has the same issue. To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1585863/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
