This issue appears to be an upstream bug, since you tested the latest upstream kernel. Would it be possible for you to open an upstream bug report[0]? That will allow the upstream Developers to examine the issue, and may provide a quicker resolution to the bug.
Please follow the instructions on the wiki page[0]. The first step is to email the appropriate mailing list. If no response is received, then a bug may be opened on bugzilla.kernel.org. Once this bug is reported upstream, please add the tag: 'kernel-bug- reported-upstream'. [0] https://wiki.ubuntu.com/Bugs/Upstream/kernel ** Changed in: linux (Ubuntu) Status: Confirmed => Triaged -- 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/1688062 Title: iwlwifi regression Status in linux package in Ubuntu: Triaged Bug description: Hi, Since I updated from Ubuntu 16.04 running kernel 4.8 (-generic-edge or something similar) to 17.04 running 4.10.0-20-generic I get a stack-trace every time I launch hostapd. This issue did not exist prior to the upgrade and is 100% reproductible. My WiFi chipset is a Intel Corporation Wireless 7260 (rev bb), and I am using a very simple configuration for hostapd. The access point does work even after the stack-trace appears but it becomes unstable after a day or two, dropping clients and sometimes freezing the system entirely. When it doesn't freeze the system I am usually able to get the access point to work again by rmmod'ing iwlwifi and iwlmvm then re-inserting them and restarting hostapd. Every restart produces the same stack-trace. The bug is similar to https://bugzilla.redhat.com/show_bug.cgi?id=1441462. Let me know if you would like me to attach some dmesg logs or any other kind of evidence. I can also perform additional testing if required. ProblemType: Bug DistroRelease: Ubuntu 17.04 Package: linux-image-4.10.0-20-generic 4.10.0-20.22 ProcVersionSignature: Ubuntu 4.10.0-20.22-generic 4.10.8 Uname: Linux 4.10.0-20-generic x86_64 ApportVersion: 2.20.4-0ubuntu4 Architecture: amd64 AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/by-id', '/dev/snd/hwC0D2', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D8p', '/dev/snd/pcmC0D7p', '/dev/snd/pcmC0D3p', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/pcmC1D0c', '/dev/snd/controlC1', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Date: Wed May 3 14:50:16 2017 HibernationDevice: RESUME=UUID=2adc96b3-9ec7-479a-a8eb-740c23d1389f InstallationDate: Installed on 2016-07-30 (276 days ago) InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) MachineType: To be filled by O.E.M. To be filled by O.E.M. ProcEnviron: TERM=screen-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-20-generic.efi.signed root=UUID=902aaccc-4309-4a44-8056-a99106dea2ad ro quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-4.10.0-20-generic N/A linux-backports-modules-4.10.0-20-generic N/A linux-firmware 1.164 SourcePackage: linux UpgradeStatus: Upgraded to zesty on 2017-04-14 (18 days ago) dmi.bios.date: 08/22/2015 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 5.11 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: Aptio CRB dmi.board.vendor: AMI Corporation dmi.board.version: To be filled by O.E.M. dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 1 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr5.11:bd08/22/2015:svnTobefilledbyO.E.M.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnAMICorporation:rnAptioCRB:rvrTobefilledbyO.E.M.:cvnToBeFilledByO.E.M.:ct1:cvrToBeFilledByO.E.M.: dmi.product.name: To be filled by O.E.M. dmi.product.version: To be filled by O.E.M. dmi.sys.vendor: To be filled by O.E.M. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1688062/+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
