I had the same issue as reported here. I noticed at boot that the driver was failing to load its primary firmware choice, falling back to a different version:
[ 3.538299] iwlwifi 0000:04:00.0: Direct firmware load for iwlwifi-7260-17.ucode failed with error -2 [ 3.541299] iwlwifi 0000:04:00.0: loaded firmware version 16.242414.0 op_mode iwlmvm I checked /lib/firmware and the highest version I had there was iwlwifi-7260-16.ucode, which corresponds to 16.242414.0 in the logs above. I decided to rename iwlwifi-7260-16.ucode to prevent it from being loaded, as this would allow the driver to fall back onto the next best firmware file, iwlwifi-7260-13.ucode. This didn't help. To fix this problem I looked at https://wireless.wiki.kernel.org/en/users/drivers/iwlwifi#firmware and downloaded iwlwifi-7260-17.ucode (via git) and copied it into /lib/firmware, then rebooted. I haven't had any issue since applying this fix, where previously I'd be getting a firmware crash once every 15-30 minutes. This new firmware file is not present in linux-firmware 1.157.3 that I have on my Xenial box, but it does seem to be included in linux-firmware 1.161 as part of Yakkety, so I suggest downloading and installing it: https://launchpad.net/ubuntu/yakkety/amd64/linux-firmware/1.161 It would be great if this update was pushed to Xenial as well in order to mitigate the issues we're seeing. Judging by the fact that downgrading to a previous firmware version didn't seem to help (so the issue was not caused by a firmware upgrade), but upgrading did help, I suspect that a recent change in iwlwifi or the kernel is causing the wifi to fail unless it is using the new firmware in iwlwifi-7260-17.ucode. -- 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/1588637 Title: iwlwifi: Microcode SW error detected. Restarting 0x2000000 Status in linux package in Ubuntu: Triaged Bug description: My wifi won't work after I wake my laptop up from standby. This problem looks quite the same as #1099487 or #944271. But I experienced this bug on Xenial with 4.4.0-22-generic (amd64). A `sudo modprobe -r iwlwifi && sudo modprobe iwlwifi` doesn't solve the problem. (A reboot does.) ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-22-generic 4.4.0-22.40 ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8 Uname: Linux 4.4.0-22-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: niklas 2175 F.... pulseaudio /dev/snd/controlC0: niklas 2175 F.... pulseaudio CurrentDesktop: KDE Date: Fri Jun 3 08:23:06 2016 InstallationDate: Installed on 2015-12-11 (174 days ago) InstallationMedia: Kubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805) IwConfig: eth0 no wireless extensions. lo no wireless extensions. lxcbr0 no wireless extensions. MachineType: LENOVO 20E8S00600 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.4.0-22-generic.efi.signed root=UUID=67485aa6-c665-4c53-bf41-328307d0cbf0 ro rootflags=subvol=@ quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.4.0-22-generic N/A linux-backports-modules-4.4.0-22-generic N/A linux-firmware 1.157 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 02/24/2015 dmi.bios.vendor: LENOVO dmi.bios.version: JHET20WW (1.00 ) dmi.board.asset.tag: Not Available dmi.board.name: Intel powered classmate PC dmi.board.vendor: LENOVO dmi.board.version: SDK0E50510 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrJHET20WW(1.00):bd02/24/2015:svnLENOVO:pn20E8S00600:pvrThinkPad11e:rvnLENOVO:rnIntelpoweredclassmatePC:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNone: dmi.product.name: 20E8S00600 dmi.product.version: ThinkPad 11e dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1588637/+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
