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[cd311 <1356236@xxxxxxxxxxxxxxxxxx>]

I tested with the 3.16.1-031601-generic #201408140014 from
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.16.1-utopic/

The kernel booted without any problems. However after a short time in
the mentioned network the same error happend again.

Following a snip from dmesg

[  158.868825] iwlwifi 0000:01:00.0: fail to flush all tx fifo queues Q 2
[  158.868842] iwlwifi 0000:01:00.0: Current SW read_ptr 198 write_ptr 144
[  158.868957] iwl data: 00000000: c0 ff 3f 00 00 00 00 00 00 00 00 00 00 00 00 00  ..?.............
[  158.869016] iwlwifi 0000:01:00.0: FH TRBs(0) = 0x00000000
[  158.869117] iwlwifi 0000:01:00.0: FH TRBs(1) = 0x801020d5
[  158.869189] iwlwifi 0000:01:00.0: FH TRBs(2) = 0x00000000
[  158.869272] iwlwifi 0000:01:00.0: FH TRBs(3) = 0x80300025
[  158.869332] iwlwifi 0000:01:00.0: FH TRBs(4) = 0x00000000
[  158.869410] iwlwifi 0000:01:00.0: FH TRBs(5) = 0x00000000
[  158.869489] iwlwifi 0000:01:00.0: FH TRBs(6) = 0x00000000
[  158.869547] iwlwifi 0000:01:00.0: FH TRBs(7) = 0x0070905b
[  158.869714] iwlwifi 0000:01:00.0: Q 0 is active and mapped to fifo 3 ra_tid 0x0000 [38,38]
[  158.869873] iwlwifi 0000:01:00.0: Q 1 is active and mapped to fifo 2 ra_tid 0x0000 [0,0]
[  158.870040] iwlwifi 0000:01:00.0: Q 2 is active and mapped to fifo 1 ra_tid 0x0000 [198,144]
[  158.870205] iwlwifi 0000:01:00.0: Q 3 is active and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  158.870366] iwlwifi 0000:01:00.0: Q 4 is active and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  158.870532] iwlwifi 0000:01:00.0: Q 5 is active and mapped to fifo 4 ra_tid 0x0000 [0,0]
[  158.870693] iwlwifi 0000:01:00.0: Q 6 is active and mapped to fifo 2 ra_tid 0x0000 [0,0]
[  158.870859] iwlwifi 0000:01:00.0: Q 7 is active and mapped to fifo 5 ra_tid 0x0000 [0,0]
[  158.871026] iwlwifi 0000:01:00.0: Q 8 is active and mapped to fifo 4 ra_tid 0x0000 [0,0]
[  158.871192] iwlwifi 0000:01:00.0: Q 9 is active and mapped to fifo 7 ra_tid 0x0000 [92,92]
[  158.871358] iwlwifi 0000:01:00.0: Q 10 is active and mapped to fifo 5 ra_tid 0x0000 [0,0]
[  158.871512] iwlwifi 0000:01:00.0: Q 11 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  158.871678] iwlwifi 0000:01:00.0: Q 12 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  158.871838] iwlwifi 0000:01:00.0: Q 13 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  158.872004] iwlwifi 0000:01:00.0: Q 14 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  158.872170] iwlwifi 0000:01:00.0: Q 15 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  158.872336] iwlwifi 0000:01:00.0: Q 16 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  158.872503] iwlwifi 0000:01:00.0: Q 17 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  158.872669] iwlwifi 0000:01:00.0: Q 18 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  158.872866] iwlwifi 0000:01:00.0: Q 19 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  207.918913] iwlwifi 0000:01:00.0: fail to flush all tx fifo queues Q 2
[  207.918919] iwlwifi 0000:01:00.0: Current SW read_ptr 192 write_ptr 130
[  207.919005] iwl data: 00000000: ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[  207.919053] iwlwifi 0000:01:00.0: FH TRBs(0) = 0x00000000
[  207.919095] iwlwifi 0000:01:00.0: FH TRBs(1) = 0x801020cf
[  207.919178] iwlwifi 0000:01:00.0: FH TRBs(2) = 0x00000000
[  207.919212] iwlwifi 0000:01:00.0: FH TRBs(3) = 0x80300054
[  207.919268] iwlwifi 0000:01:00.0: FH TRBs(4) = 0x00000000
[  207.919354] iwlwifi 0000:01:00.0: FH TRBs(5) = 0x00000000
[  207.919410] iwlwifi 0000:01:00.0: FH TRBs(6) = 0x00000000
[  207.919495] iwlwifi 0000:01:00.0: FH TRBs(7) = 0x007090c9
[  207.919725] iwlwifi 0000:01:00.0: Q 0 is active and mapped to fifo 3 ra_tid 0x0000 [85,85]
[  207.919925] iwlwifi 0000:01:00.0: Q 1 is active and mapped to fifo 2 ra_tid 0x0000 [0,0]
[  207.920095] iwlwifi 0000:01:00.0: Q 2 is active and mapped to fifo 1 ra_tid 0x0000 [192,130]
[  207.920265] iwlwifi 0000:01:00.0: Q 3 is active and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  207.920434] iwlwifi 0000:01:00.0: Q 4 is active and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  207.920604] iwlwifi 0000:01:00.0: Q 5 is active and mapped to fifo 4 ra_tid 0x0000 [0,0]
[  207.920766] iwlwifi 0000:01:00.0: Q 6 is active and mapped to fifo 2 ra_tid 0x0000 [0,0]
[  207.920958] iwlwifi 0000:01:00.0: Q 7 is active and mapped to fifo 5 ra_tid 0x0000 [0,0]
[  207.921125] iwlwifi 0000:01:00.0: Q 8 is active and mapped to fifo 4 ra_tid 0x0000 [0,0]
[  207.921292] iwlwifi 0000:01:00.0: Q 9 is active and mapped to fifo 7 ra_tid 0x0000 [202,202]
[  207.921459] iwlwifi 0000:01:00.0: Q 10 is active and mapped to fifo 5 ra_tid 0x0000 [0,0]
[  207.921633] iwlwifi 0000:01:00.0: Q 11 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  207.921795] iwlwifi 0000:01:00.0: Q 12 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  207.921989] iwlwifi 0000:01:00.0: Q 13 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  207.922159] iwlwifi 0000:01:00.0: Q 14 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  207.922329] iwlwifi 0000:01:00.0: Q 15 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  207.922498] iwlwifi 0000:01:00.0: Q 16 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  207.922662] iwlwifi 0000:01:00.0: Q 17 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  207.922881] iwlwifi 0000:01:00.0: Q 18 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  207.923076] iwlwifi 0000:01:00.0: Q 19 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  210.152333] wlan0: deauthenticating from 08:81:f4:55:b5:06 by local choice (Reason: 3=DEAUTH_LEAVING)
[  212.158751] iwlwifi 0000:01:00.0: fail to flush all tx fifo queues Q 2
[  212.158757] iwlwifi 0000:01:00.0: Current SW read_ptr 10 write_ptr 168
[  212.158841] iwl data: 00000000: 00 fc ff 03 00 00 00 00 00 00 00 00 00 00 00 00  ................
[  212.158889] iwlwifi 0000:01:00.0: FH TRBs(0) = 0x00000000
[  212.158943] iwlwifi 0000:01:00.0: FH TRBs(1) = 0x80102019
[  212.158991] iwlwifi 0000:01:00.0: FH TRBs(2) = 0x00000000
[  212.159045] iwlwifi 0000:01:00.0: FH TRBs(3) = 0x80300056
[  212.159100] iwlwifi 0000:01:00.0: FH TRBs(4) = 0x00000000
[  212.159154] iwlwifi 0000:01:00.0: FH TRBs(5) = 0x00000000
[  212.159209] iwlwifi 0000:01:00.0: FH TRBs(6) = 0x00000000
[  212.159263] iwlwifi 0000:01:00.0: FH TRBs(7) = 0x007090cf
[  212.159462] iwlwifi 0000:01:00.0: Q 0 is active and mapped to fifo 3 ra_tid 0x0000 [87,87]
[  212.159628] iwlwifi 0000:01:00.0: Q 1 is active and mapped to fifo 2 ra_tid 0x0000 [0,0]
[  212.159790] iwlwifi 0000:01:00.0: Q 2 is active and mapped to fifo 1 ra_tid 0x0000 [10,168]
[  212.159952] iwlwifi 0000:01:00.0: Q 3 is active and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  212.160106] iwlwifi 0000:01:00.0: Q 4 is active and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  212.160273] iwlwifi 0000:01:00.0: Q 5 is active and mapped to fifo 4 ra_tid 0x0000 [0,0]
[  212.160432] iwlwifi 0000:01:00.0: Q 6 is active and mapped to fifo 2 ra_tid 0x0000 [0,0]
[  212.160630] iwlwifi 0000:01:00.0: Q 7 is active and mapped to fifo 5 ra_tid 0x0000 [0,0]
[  212.160797] iwlwifi 0000:01:00.0: Q 8 is active and mapped to fifo 4 ra_tid 0x0000 [0,0]
[  212.160964] iwlwifi 0000:01:00.0: Q 9 is active and mapped to fifo 7 ra_tid 0x0000 [208,208]
[  212.161131] iwlwifi 0000:01:00.0: Q 10 is active and mapped to fifo 5 ra_tid 0x0000 [0,0]
[  212.161298] iwlwifi 0000:01:00.0: Q 11 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  212.161492] iwlwifi 0000:01:00.0: Q 12 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  212.161658] iwlwifi 0000:01:00.0: Q 13 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  212.161824] iwlwifi 0000:01:00.0: Q 14 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  212.161991] iwlwifi 0000:01:00.0: Q 15 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  212.162157] iwlwifi 0000:01:00.0: Q 16 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  212.162318] iwlwifi 0000:01:00.0: Q 17 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  212.162479] iwlwifi 0000:01:00.0: Q 18 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  212.162632] iwlwifi 0000:01:00.0: Q 19 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  214.170614] iwlwifi 0000:01:00.0: fail to flush all tx fifo queues Q 2
[  214.170620] iwlwifi 0000:01:00.0: Current SW read_ptr 58 write_ptr 169
[  214.170702] iwl data: 00000000: ff 03 00 00 00 00 00 00 00 00 00 fc 00 00 00 00  ................
[  214.170758] iwlwifi 0000:01:00.0: FH TRBs(0) = 0x00000000
[  214.170813] iwlwifi 0000:01:00.0: FH TRBs(1) = 0x80102049
[  214.170869] iwlwifi 0000:01:00.0: FH TRBs(2) = 0x00000000
[  214.170924] iwlwifi 0000:01:00.0: FH TRBs(3) = 0x80300057
[  214.170979] iwlwifi 0000:01:00.0: FH TRBs(4) = 0x00000000
[  214.171033] iwlwifi 0000:01:00.0: FH TRBs(5) = 0x00000000
[  214.171088] iwlwifi 0000:01:00.0: FH TRBs(6) = 0x00000000
[  214.171143] iwlwifi 0000:01:00.0: FH TRBs(7) = 0x007090cf
[  214.171313] iwlwifi 0000:01:00.0: Q 0 is active and mapped to fifo 3 ra_tid 0x0000 [88,88]
[  214.171484] iwlwifi 0000:01:00.0: Q 1 is active and mapped to fifo 2 ra_tid 0x0000 [0,0]
[  214.171653] iwlwifi 0000:01:00.0: Q 2 is active and mapped to fifo 1 ra_tid 0x0000 [58,169]
[  214.171821] iwlwifi 0000:01:00.0: Q 3 is active and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  214.171990] iwlwifi 0000:01:00.0: Q 4 is active and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  214.172160] iwlwifi 0000:01:00.0: Q 5 is active and mapped to fifo 4 ra_tid 0x0000 [0,0]
[  214.172328] iwlwifi 0000:01:00.0: Q 6 is active and mapped to fifo 2 ra_tid 0x0000 [0,0]
[  214.172497] iwlwifi 0000:01:00.0: Q 7 is active and mapped to fifo 5 ra_tid 0x0000 [0,0]
[  214.172666] iwlwifi 0000:01:00.0: Q 8 is active and mapped to fifo 4 ra_tid 0x0000 [0,0]
[  214.172829] iwlwifi 0000:01:00.0: Q 9 is active and mapped to fifo 7 ra_tid 0x0000 [208,208]
[  214.172993] iwlwifi 0000:01:00.0: Q 10 is active and mapped to fifo 5 ra_tid 0x0000 [0,0]
[  214.173156] iwlwifi 0000:01:00.0: Q 11 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  214.173325] iwlwifi 0000:01:00.0: Q 12 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  214.173494] iwlwifi 0000:01:00.0: Q 13 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  214.173663] iwlwifi 0000:01:00.0: Q 14 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  214.173832] iwlwifi 0000:01:00.0: Q 15 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  214.173995] iwlwifi 0000:01:00.0: Q 16 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  214.174148] iwlwifi 0000:01:00.0: Q 17 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  214.174310] iwlwifi 0000:01:00.0: Q 18 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[  214.174473] iwlwifi 0000:01:00.0: Q 19 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]

** Changed in: linux (Ubuntu)
       Status: Incomplete => Confirmed

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https://bugs.launchpad.net/bugs/1356236

Title:
  [Samsung NP900X3C-A05DE] iwlwifi 0000:01:00.0: fail to flush all tx
  fifo queues Q 2 with Centrino Advanced-N 6235 wireless card

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  The network I want to connect is a WPA-EAP wireless network called eduroam https://www.eduroam.org/ . My machine data:
  Wlan chip is a
             *-network
                  description: Wireless interface
                  product: Centrino Advanced-N 6235
                  vendor: Intel Corporation
                  physical id: 0
                  bus info: pci@0000:01:00.0
                  logical name: wlan0
                  version: 24
                  serial: c8:f7:33:19:7e:f4
                  width: 64 bits
                  clock: 33MHz
                  capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
                  configuration: broadcast=yes driver=iwlwifi driverversion=3.13.0-32-generic firmware=18.168.6.1 ip=172.19.3.235 latency=0 link=yes multicast=yes wireless=IEEE 802.11abg
                  resources: irq:49 memory:f0600000-f0601fff

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-32-generic 3.13.0-32.57
  ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
  Uname: Linux 3.13.0-32-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  degenkolb   2203 F.... pulseaudio
                        degenkolb   2587 F.... pulseaudio
  CurrentDesktop: KDE
  Date: Wed Aug 13 10:32:45 2014
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=d7406378-f782-4cab-80d9-4fe3c2f4c94c
  InstallationDate: Installed on 2013-12-05 (250 days ago)
  InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: SAMSUNG ELECTRONICS CO., LTD. 900X3C/900X3D/900X4C/900X4D
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-32-generic root=UUID=04d6e506-7152-4b6c-b19f-3877e0710fc6 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-32-generic N/A
   linux-backports-modules-3.13.0-32-generic  N/A
   linux-firmware                             1.127.5
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2014-06-18 (55 days ago)
  dmi.bios.date: 09/19/2012
  dmi.bios.vendor: Phoenix Technologies Ltd.
  dmi.bios.version: P02ABK
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: NP900X3C-A05DE
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: FAB1
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP02ABK:bd09/19/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn900X3C/900X3D/900X4C/900X4D:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNP900X3C-A05DE:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1:
  dmi.product.name: 900X3C/900X3D/900X4C/900X4D
  dmi.product.version: 0.1
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

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