apport information

** Attachment added: "ProcInterrupts.txt"
   
https://bugs.launchpad.net/bugs/1871430/+attachment/5348899/+files/ProcInterrupts.txt

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https://bugs.launchpad.net/bugs/1871430

Title:
  iwlwifi/iwlmvm & Intel 9260 made kernel unstable since 4.15.0-91

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  My home server/router/access point runs under Ubuntu 18.04.4 with all updates 
and has 2 wifi adapters operated by hostapd
  one is USB AR9271 (0cf3:9271, driver ath9k_htc), another is PCIe Intel AC 
9260 (8086:2526, driver iwlwifi).
  with kernel 4.15.0-88 it worked quite stable, with reboots required mostly 
after kernel upgrades (much less frequent reboots due to panics)
  with kernel 4.15.0-91 and -96 it started rebooting by itself by panic when a 
lot of activity happening via Intel 9260.
  In /etc/sysctl* I have kernel.panic=10 , kernel.softlockup_panic=1 and 
kernel.panic_on_oops=1 overrides of default values.
  In dmesg logs preceding the reboot, I see multiple warnings with stacks 
inside iwl_mvm functions which I could provide by apport. Also, multiple 
messages like "Command LQ_CMD: a command is already active!" or "Error sending 
LQ_CMD: time out after 2000ms"
  Unfortunately I run this box headless and I don't have another wired Ethernet 
host to capture its panics by netconsole
  The rest of hardware is pretty standard. Asus B85M-G mobo, Core i3-4130T CPU, 
nothing overly special.
  More details I would provide in your further requests but the current kernel 
behavior is very annoying.
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.9-0ubuntu7.14
  Architecture: amd64
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', 
'/dev/snd/hwC1D0', '/dev/snd/pcmC1D2c', '/dev/snd/pcmC1D1p', 
'/dev/snd/pcmC1D0c', '/dev/snd/pcmC1D0p', '/dev/snd/controlC1', 
'/dev/snd/hwC0D0', '/dev/snd/pcmC0D10p', '/dev/snd/pcmC0D9p', 
'/dev/snd/pcmC0D8p', '/dev/snd/pcmC0D7p', '/dev/snd/pcmC0D3p', 
'/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  DistroRelease: Ubuntu 18.04
  HibernationDevice: #RESUME=UUID=f7bcdeb1-6c61-4012-81c4-a43a492ffb6e
  InstallationDate: Installed on 2009-11-01 (3810 days ago)
  InstallationMedia: Kubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
  MachineType: ASUS All Series
  Package: linux (not installed)
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-96-generic 
root=/dev/mapper/vg00-root64 ro rootflags=commit=3600 rootflags=commit=3600 
loop.max_part=63
  ProcVersionSignature: Ubuntu 4.15.0-96.97-generic 4.15.18
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No 
PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-4.15.0-96-generic N/A
   linux-backports-modules-4.15.0-96-generic  N/A
   linux-firmware                             1.173.17
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
  Tags:  bionic
  Uname: Linux 4.15.0-96-generic x86_64
  UpgradeStatus: Upgraded to bionic on 2010-10-11 (3466 days ago)
  UserGroups: adm admin audio cdrom dialout dip disk dos fuse jabber kvm 
libvirt libvirtd lpadmin plugdev proxy pulse pulse-access sambashare src
  _MarkForUpload: True
  dmi.bios.date: 07/22/2015
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 2501
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: B85M-G
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev X.0x
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr2501:bd07/22/2015:svnASUS:pnAllSeries:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnB85M-G:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.family: ASUS MB
  dmi.product.name: All Series
  dmi.product.version: System Version
  dmi.sys.vendor: ASUS

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