apport information

** Attachment added: "Lspci.txt"
   https://bugs.launchpad.net/bugs/1883597/+attachment/5384172/+files/Lspci.txt

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https://bugs.launchpad.net/bugs/1883597

Title:
  Kernel 4.4.0-184 hangs when issuing tc qdisc command

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  On stock kernel 4.4.0.184-214, issuing "tc qdisc add dev eth0 root fq maxrate 
25mbit" causes CPU lockup
  (NMI watchdog: BUG: soft lockup - CPU#26 stuck for 22s! [tc:6394])

  This does not occur on 4.4.0.179 or earlier.
  Happens on both a intel i40e driver and ixgbe.
  --- 
  AlsaDevices:
   total 0
   crw-rw----+ 1 root audio 116,  1 Jun 15 14:52 seq
   crw-rw----+ 1 root audio 116, 33 Jun 15 14:52 timer
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.20.1-0ubuntu2.23
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', 
'/dev/snd/timer'] failed with exit code 1:
  DistroRelease: Ubuntu 16.04
  HibernationDevice: RESUME=UUID=09e7e0db-e2ed-4cb1-8d1b-2eefdaa81d3a
  InstallationDate: Installed on 2019-02-22 (479 days ago)
  InstallationMedia: Ubuntu-Server 16.04.3 LTS "Xenial Xerus" - Release amd64 
(20170801)
  IwConfig: Error: [Errno 2] No such file or directory
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 004: ID 0557:2419 ATEN International Co., Ltd 
   Bus 001 Device 003: ID 0557:7000 ATEN International Co., Ltd Hub
   Bus 001 Device 002: ID 0d3d:0040 Tangtop Technology Co., Ltd PS/2 Adapter
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Supermicro SSG-6029P-E1CR12L
  Package: linux (not installed)
  PciMultimedia:
   
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US
   SHELL=/bin/bash
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-184-generic 
root=UUID=8b0d6ed1-2955-4f7a-aeb6-cbfa319aed17 ro text nomodeset consoleblank=0 
nopti crashkernel=384M-:128M crashkernel=384M-2G:64M,2G-:768M
  ProcVersionSignature: Ubuntu 4.4.0-184.214-generic 4.4.223
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-184-generic N/A
   linux-backports-modules-4.4.0-184-generic  N/A
   linux-firmware                             1.157.23
  RfKill: Error: [Errno 2] No such file or directory
  Tags:  xenial
  Uname: Linux 4.4.0-184-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  _MarkForUpload: True
  dmi.bios.date: 02/27/2018
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 2.0b
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: X11DPH-T
  dmi.board.vendor: Supermicro
  dmi.board.version: 1.01
  dmi.chassis.asset.tag: To be filled by O.E.M.
  dmi.chassis.type: 1
  dmi.chassis.vendor: Supermicro
  dmi.chassis.version: 0123456789
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr2.0b:bd02/27/2018:svnSupermicro:pnSSG-6029P-E1CR12L:pvr0123456789:rvnSupermicro:rnX11DPH-T:rvr1.01:cvnSupermicro:ct1:cvr0123456789:
  dmi.product.name: SSG-6029P-E1CR12L
  dmi.product.version: 0123456789
  dmi.sys.vendor: Supermicro
  --- 
  AlsaDevices:
   total 0
   crw-rw----+ 1 root audio 116,  1 Jun 15 14:52 seq
   crw-rw----+ 1 root audio 116, 33 Jun 15 14:52 timer
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.20.1-0ubuntu2.23
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', 
'/dev/snd/timer'] failed with exit code 1:
  DistroRelease: Ubuntu 16.04
  HibernationDevice: RESUME=UUID=09e7e0db-e2ed-4cb1-8d1b-2eefdaa81d3a
  InstallationDate: Installed on 2019-02-22 (479 days ago)
  InstallationMedia: Ubuntu-Server 16.04.3 LTS "Xenial Xerus" - Release amd64 
(20170801)
  IwConfig: Error: [Errno 2] No such file or directory
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 004: ID 0557:2419 ATEN International Co., Ltd 
   Bus 001 Device 003: ID 0557:7000 ATEN International Co., Ltd Hub
   Bus 001 Device 002: ID 0d3d:0040 Tangtop Technology Co., Ltd PS/2 Adapter
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Supermicro SSG-6029P-E1CR12L
  Package: linux (not installed)
  PciMultimedia:
   
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US
   SHELL=/bin/bash
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-184-generic 
root=UUID=8b0d6ed1-2955-4f7a-aeb6-cbfa319aed17 ro text nomodeset consoleblank=0 
nopti crashkernel=384M-:128M crashkernel=384M-2G:64M,2G-:768M
  ProcVersionSignature: Ubuntu 4.4.0-184.214-generic 4.4.223
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-184-generic N/A
   linux-backports-modules-4.4.0-184-generic  N/A
   linux-firmware                             1.157.23
  RfKill: Error: [Errno 2] No such file or directory
  Tags:  xenial
  Uname: Linux 4.4.0-184-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  _MarkForUpload: True
  dmi.bios.date: 02/27/2018
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 2.0b
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: X11DPH-T
  dmi.board.vendor: Supermicro
  dmi.board.version: 1.01
  dmi.chassis.asset.tag: To be filled by O.E.M.
  dmi.chassis.type: 1
  dmi.chassis.vendor: Supermicro
  dmi.chassis.version: 0123456789
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr2.0b:bd02/27/2018:svnSupermicro:pnSSG-6029P-E1CR12L:pvr0123456789:rvnSupermicro:rnX11DPH-T:rvr1.01:cvnSupermicro:ct1:cvr0123456789:
  dmi.product.name: SSG-6029P-E1CR12L
  dmi.product.version: 0123456789
  dmi.sys.vendor: Supermicro

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