I seem to be in a similar position to Nicolas. Before a suspend, with wifi working, WWAN is disabled according to 'nmcli nm'. Then, after suspending, with wifi not working, WWAN is enabled.
However, sometimes wifi doesn't work even after restarting my Dell laptop and WWAN is disabled after restarting regardless of whether or not wifi is working. So the WWAN enabled/disabled may be a red herring. I've also noticed link=yes in the 'configuration' entry for the wireless adapter section of 'sudo lshw -C network' when wifi is working but link=no when wifi does not work. But maybe the link attribute is just another way of indicating whether it's working or not (i.e., an effect rather than a cause). I don't know what the 'link' value means. Wifi used to reconnect for me without any problems on my Dell in 12.04 LTS. It's only since upgrading to 14.04 I've had these problems (http://ubuntuforums.org/showthread.php?t=2218612). Interestingly, wifi fails to reconnect after suspending if I'm running off the 14.04 Live CD too. Presumably wifi would reconnect successfully after suspending if I was running off a 12.04 Live CD but I haven't tried that. Maybe if we ran these or other commands before and after suspending on 12.04 and 14.04 Live CDs we could isolate what's changed. ** Attachment added: "before_suspend_wifi_working.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1286552/+attachment/4096909/+files/before_suspend_wifi_working.txt -- 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/1286552 Title: No wifi after suspend Status in “linux” package in Ubuntu: Confirmed Status in “network-manager” package in Ubuntu: Confirmed Bug description: After suspending ubuntu the wifi doesn't work. The solution given here (http://askubuntu.com/questions/368671/ubuntu-13-10-wifi-not-re- connecting-after-suspend) worked for me but when I have updated my Ubuntu now it won't work. I have tried to test mainline kernel but it won't to boot with it. To reproduce the bug : just suspend the computer and then power it. There's no wifi network until you restart the computer. ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: ubuntu-release-upgrader-core 1:0.205.4 ProcVersionSignature: Ubuntu 3.11.0-15.25-generic 3.11.10 Uname: Linux 3.11.0-15-generic i686 ApportVersion: 2.12.5-0ubuntu2.2 Architecture: i386 CrashDB: ubuntu Date: Sat Mar 1 15:20:39 2014 InstallationDate: Installed on 2013-12-30 (61 days ago) InstallationMedia: Ubuntu-GNOME 13.10 "Saucy Salamander" - Release i386 (20131017) MarkForUpload: True PackageArchitecture: all SourcePackage: ubuntu-release-upgrader Symptom: dist-upgrade UpgradeStatus: No upgrade log present (probably fresh install) --- ApportVersion: 2.12.5-0ubuntu2.2 Architecture: i386 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: meradi 1503 F.... pulseaudio DistroRelease: Ubuntu 13.10 HibernationDevice: RESUME=UUID=e71568e2-e875-4053-b3b7-2046540e78bf InstallationDate: Installed on 2013-12-30 (61 days ago) InstallationMedia: Ubuntu-GNOME 13.10 "Saucy Salamander" - Release i386 (20131017) MachineType: Hewlett-Packard HP Compaq 6830s MarkForUpload: True Package: linux (not installed) ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-15-generic root=UUID=3eaae47b-7485-4723-8b3e-9f6dac7a01e4 ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.11.0-15.25-generic 3.11.10 RelatedPackageVersions: linux-restricted-modules-3.11.0-15-generic N/A linux-backports-modules-3.11.0-15-generic N/A linux-firmware 1.116.2 Tags: saucy Uname: Linux 3.11.0-15-generic i686 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo WifiSyslog: Mar 1 15:34:33 meradi-HP-Compaq-6830s kernel: [ 4581.474196] perf samples too long (5002 > 5000), lowering kernel.perf_event_max_sample_rate to 25000 dmi.bios.date: 03/12/2009 dmi.bios.vendor: Hewlett-Packard dmi.bios.version: 68PZD Ver. F.0C dmi.board.name: 30E9 dmi.board.vendor: Hewlett-Packard dmi.board.version: KBC Version 95.1C dmi.chassis.asset.tag: CNU91609Y2 dmi.chassis.type: 10 dmi.chassis.vendor: Hewlett-Packard dmi.modalias: dmi:bvnHewlett-Packard:bvr68PZDVer.F.0C:bd03/12/2009:svnHewlett-Packard:pnHPCompaq6830s:pvrF.0C:rvnHewlett-Packard:rn30E9:rvrKBCVersion95.1C:cvnHewlett-Packard:ct10:cvr: dmi.product.name: HP Compaq 6830s dmi.product.version: F.0C dmi.sys.vendor: Hewlett-Packard To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1286552/+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
