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[Bug 1413694] Re: Since 3.18.x, iwlwifi has severe connection problems

 

[  934.033045] iwlwifi 0000:06:00.0: fail to flush all tx fifo queues Q 0
[  934.033050] iwlwifi 0000:06:00.0: Current SW read_ptr 74 write_ptr 77                                                                                                                                        
[  934.033213] iwl data: 00000000: 00 1c 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................                                                                                                            
[  934.033225] iwlwifi 0000:06:00.0: FH TRBs(0) = 0x00000000
[  934.033237] iwlwifi 0000:06:00.0: FH TRBs(1) = 0xc011008e                                                                                                                                                    
[  934.033249] iwlwifi 0000:06:00.0: FH TRBs(2) = 0x00000000                                                                                                                                                    
[  934.033261] iwlwifi 0000:06:00.0: FH TRBs(3) = 0x8030004c                                                                                                                                                    
[  934.033273] iwlwifi 0000:06:00.0: FH TRBs(4) = 0x00000000                                                                                                                                                    
[  934.033285] iwlwifi 0000:06:00.0: FH TRBs(5) = 0x00000000                                                                                                                                                    
[  934.033296] iwlwifi 0000:06:00.0: FH TRBs(6) = 0x00000000                                                                                                                                                    
[  934.033308] iwlwifi 0000:06:00.0: FH TRBs(7) = 0x00709082                                                                                                                                                    
[  934.033358] iwlwifi 0000:06:00.0: Q 0 is active and mapped to fifo 3 ra_tid 0x0000 [74,77]                                                                                                                   
[  934.033408] iwlwifi 0000:06:00.0: Q 1 is active and mapped to fifo 2 ra_tid 0x0000 [0,0]                                                                                                                     
[  934.033457] iwlwifi 0000:06:00.0: Q 2 is active and mapped to fifo 1 ra_tid 0x0000 [39,39]                                                                                                                   
[  934.033506] iwlwifi 0000:06:00.0: Q 3 is active and mapped to fifo 0 ra_tid 0x0000 [0,0]                                                                                                                     
[  934.033556] iwlwifi 0000:06:00.0: Q 4 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]                                                                                                                   
[  934.033605] iwlwifi 0000:06:00.0: Q 5 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]                                                                                                                   
[  934.033654] iwlwifi 0000:06:00.0: Q 6 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]                                                                                                                   
[  934.033703] iwlwifi 0000:06:00.0: Q 7 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]                                                                                                                   
[  934.033753] iwlwifi 0000:06:00.0: Q 8 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]                                                                                                                   
[  934.033802] iwlwifi 0000:06:00.0: Q 9 is active and mapped to fifo 7 ra_tid 0x0000 [131,131]                                                                                                                 
[  934.033851] iwlwifi 0000:06:00.0: Q 10 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]                                                                                                                  
[  934.033900] iwlwifi 0000:06:00.0: Q 11 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]                                                                                                                  
[  934.033950] iwlwifi 0000:06:00.0: Q 12 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]                                                                                                                  
[  934.033999] iwlwifi 0000:06:00.0: Q 13 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]                                                                                                                  
[  934.034049] iwlwifi 0000:06:00.0: Q 14 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]                                                                                                                  
[  934.034098] iwlwifi 0000:06:00.0: Q 15 is active and mapped to fifo 5 ra_tid 0x0000 [0,0]                                                                                                                    
[  934.034147] iwlwifi 0000:06:00.0: Q 16 is active and mapped to fifo 1 ra_tid 0x0000 [140,254]                                                                                                                
[  934.034196] iwlwifi 0000:06:00.0: Q 17 is inactive and mapped to fifo 3 ra_tid 0x0006 [28,28]                                                                                                                
[  934.034246] iwlwifi 0000:06:00.0: Q 18 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]                                                                                                                  
[  934.034295] iwlwifi 0000:06:00.0: Q 19 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]                                                                                                                  
[  941.090659] init: wait-for-state (whoopsienetwork-manager) main process (5661) terminated with status 100                                                                                                    
[  941.107567] init: whoopsie main process (5779) terminated with status 1
[  941.107578] init: whoopsie main process ended, respawning
[  971.141882] init: wait-for-state (whoopsienetwork-manager) main process (5783) terminated with status 100
[  971.159215] init: whoopsie main process (5820) terminated with status 1
[  971.159222] init: whoopsie main process ended, respawning
[ 1001.194806] init: wait-for-state (whoopsienetwork-manager) main process (5824) terminated with status 100
[ 1001.211687] init: whoopsie main process (5867) terminated with status 1
[ 1001.211696] init: whoopsie main process ended, respawning
[ 1031.247140] init: wait-for-state (whoopsienetwork-manager) main process (5871) terminated with status 100
[ 1031.263996] init: whoopsie main process (5899) terminated with status 1
[ 1031.264005] init: whoopsie main process ended, respawning
[ 1048.984551] wlan0: deauthenticated from c0:25:06:10:e8:09 (Reason: 6=CLASS2_FRAME_FROM_NONAUTH_STA)
[ 1048.991279] cfg80211: Calling CRDA to update world regulatory domain
[ 1048.992664] wlan0: authenticate with c0:25:06:10:e8:09
[ 1049.000991] wlan0: send auth to c0:25:06:10:e8:09 (try 1/3)
[ 1049.001377] cfg80211: World regulatory domain updated:
[ 1049.001385] cfg80211:  DFS Master region: unset
[ 1049.001389] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 1049.001396] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1049.001402] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1049.001406] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1049.001411] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1049.001416] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1049.004574] wlan0: authenticated
[ 1049.006882] wlan0: associate with c0:25:06:10:e8:09 (try 1/3)
[ 1049.013869] wlan0: RX AssocResp from c0:25:06:10:e8:09 (capab=0x431 status=0 aid=5)
[ 1049.015091] wlan0: associated
[ 1049.015170] cfg80211: Calling CRDA for country: DE
[ 1049.018332] cfg80211: Regulatory domain changed to country: DE
[ 1049.018337] cfg80211:  DFS Master region: ETSI
[ 1049.018339] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 1049.018343] cfg80211:   (2400000 KHz - 2483500 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 1049.018345] cfg80211:   (5150000 KHz - 5250000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 1049.018348] cfg80211:   (5250000 KHz - 5350000 KHz @ 40000 KHz), (N/A, 2000 mBm), (0 s)
[ 1049.018350] cfg80211:   (5470000 KHz - 5725000 KHz @ 40000 KHz), (N/A, 2698 mBm), (0 s)
[ 1049.018352] cfg80211:   (57240000 KHz - 65880000 KHz @ 2160000 KHz), (N/A, 4000 mBm), (N/A)
[ 1061.297628] init: wait-for-state (whoopsienetwork-manager) main process (5903) terminated with status 100
[ 1061.325558] init: whoopsie main process (5968) terminated with status 1
[ 1061.325577] init: whoopsie main process ended, respawning
[ 1091.374348] init: wait-for-state (whoopsienetwork-manager) main process (5972) terminated with status 100
[ 1091.396067] init: whoopsie main process (6018) terminated with status 1
[ 1091.396076] init: whoopsie main process ended, respawning
[ 1121.430742] init: wait-for-state (whoopsienetwork-manager) main process (6022) terminated with status 100
[ 1121.457079] init: whoopsie main process (6056) terminated with status 1
[ 1121.457091] init: whoopsie main process ended, respawning
[ 1126.464543] cfg80211: Calling CRDA to update world regulatory domain
[ 1126.467085] cfg80211: World regulatory domain updated:
[ 1126.467087] cfg80211:  DFS Master region: unset
[ 1126.467089] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 1126.467091] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1126.467092] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1126.467094] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1126.467095] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1126.467096] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm), (N/A)
[ 1130.353015] wlan0: authenticate with c0:25:06:10:e8:09
[ 1130.358923] wlan0: send auth to c0:25:06:10:e8:09 (try 1/3)
[ 1130.399079] wlan0: send auth to c0:25:06:10:e8:09 (try 2/3)
[ 1130.470233] wlan0: send auth to c0:25:06:10:e8:09 (try 3/3)
[ 1130.526241] wlan0: authentication with c0:25:06:10:e8:09 timed out
[ 1134.835116] wlan0: authenticate with c0:25:06:10:e8:09
[ 1134.840380] wlan0: send auth to c0:25:06:10:e8:09 (try 1/3)
[ 1134.847219] wlan0: authenticated
[ 1134.851235] wlan0: associate with c0:25:06:10:e8:09 (try 1/3)
[ 1134.858655] wlan0: RX AssocResp from c0:25:06:10:e8:09 (capab=0x431 status=0 aid=2)
[ 1134.860231] wlan0: associated
[ 1134.860290] cfg80211: Calling CRDA for country: DE
[ 1134.862638] cfg80211: Regulatory domain changed to country: DE
[ 1134.862640] cfg80211:  DFS Master region: ETSI
[ 1134.862641] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[ 1134.862643] cfg80211:   (2400000 KHz - 2483500 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 1134.862645] cfg80211:   (5150000 KHz - 5250000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[ 1134.862647] cfg80211:   (5250000 KHz - 5350000 KHz @ 40000 KHz), (N/A, 2000 mBm), (0 s)
[ 1134.862648] cfg80211:   (5470000 KHz - 5725000 KHz @ 40000 KHz), (N/A, 2698 mBm), (0 s)
[ 1134.862649] cfg80211:   (57240000 KHz - 65880000 KHz @ 2160000 KHz), (N/A, 4000 mBm), (N/A)
erik@XPS12-9Q33:~$

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https://bugs.launchpad.net/bugs/1413694

Title:
  Since 3.18.x, iwlwifi has severe connection problems

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  after the switch to 3.18, the wifi connection drops very often (50% of
  the time or more). dmesg | grep iwlwifi:

  erik@XPS12-9Q33:~$ dmesg | grep iwlwifi
  [    7.026062] iwlwifi 0000:06:00.0: enabling device (0000 -> 0002)
  [    7.026551] iwlwifi 0000:06:00.0: irq 45 for MSI/MSI-X
  [    7.032559] iwlwifi 0000:06:00.0: loaded firmware version 23.11.10.0 op_mode iwlmvm
  [    7.061571] iwlwifi 0000:06:00.0: Detected Intel(R) Dual Band Wireless AC 7260, REV=0x144
  [    7.061906] iwlwifi 0000:06:00.0: L1 Enabled - LTR Enabled
  [    7.062376] iwlwifi 0000:06:00.0: L1 Enabled - LTR Enabled
  [    8.428473] iwlwifi 0000:06:00.0: L1 Enabled - LTR Enabled
  [    8.428976] iwlwifi 0000:06:00.0: L1 Enabled - LTR Enabled
  [ 1062.829041] iwlwifi 0000:06:00.0: fail to flush all tx fifo queues Q 0
  [ 1062.830289] iwlwifi 0000:06:00.0: Current SW read_ptr 100 write_ptr 101
  [ 1062.832187] iwlwifi 0000:06:00.0: FH TRBs(0) = 0x8000300d
  [ 1062.833307] iwlwifi 0000:06:00.0: FH TRBs(1) = 0xc01100c0
  [ 1062.834239] iwlwifi 0000:06:00.0: FH TRBs(2) = 0x00000000
  [ 1062.835165] iwlwifi 0000:06:00.0: FH TRBs(3) = 0x80300064
  [ 1062.836090] iwlwifi 0000:06:00.0: FH TRBs(4) = 0x00000000
  [ 1062.837006] iwlwifi 0000:06:00.0: FH TRBs(5) = 0x00000000
  [ 1062.837933] iwlwifi 0000:06:00.0: FH TRBs(6) = 0x00000000
  [ 1062.838821] iwlwifi 0000:06:00.0: FH TRBs(7) = 0x00709090
  [ 1062.839737] iwlwifi 0000:06:00.0: Q 0 is active and mapped to fifo 3 ra_tid 0x0000 [100,101]
  [ 1062.840675] iwlwifi 0000:06:00.0: Q 1 is active and mapped to fifo 2 ra_tid 0x0000 [0,0]
  [ 1062.841915] iwlwifi 0000:06:00.0: Q 2 is active and mapped to fifo 1 ra_tid 0x0000 [84,84]
  [ 1062.842836] iwlwifi 0000:06:00.0: Q 3 is active and mapped to fifo 0 ra_tid 0x0000 [14,14]
  [ 1062.843777] iwlwifi 0000:06:00.0: Q 4 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [ 1062.844695] iwlwifi 0000:06:00.0: Q 5 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [ 1062.845917] iwlwifi 0000:06:00.0: Q 6 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [ 1062.846825] iwlwifi 0000:06:00.0: Q 7 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [ 1062.847723] iwlwifi 0000:06:00.0: Q 8 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [ 1062.848612] iwlwifi 0000:06:00.0: Q 9 is active and mapped to fifo 7 ra_tid 0x0000 [145,145]
  [ 1062.849812] iwlwifi 0000:06:00.0: Q 10 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [ 1062.850707] iwlwifi 0000:06:00.0: Q 11 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [ 1062.851601] iwlwifi 0000:06:00.0: Q 12 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [ 1062.852484] iwlwifi 0000:06:00.0: Q 13 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [ 1062.853673] iwlwifi 0000:06:00.0: Q 14 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [ 1062.854539] iwlwifi 0000:06:00.0: Q 15 is active and mapped to fifo 5 ra_tid 0x0000 [0,0]
  [ 1062.855739] iwlwifi 0000:06:00.0: Q 16 is active and mapped to fifo 1 ra_tid 0x0000 [177,219]
  [ 1062.856623] iwlwifi 0000:06:00.0: Q 17 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [ 1062.857829] iwlwifi 0000:06:00.0: Q 18 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
  [ 1062.858725] iwlwifi 0000:06:00.0: Q 19 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]

  DS Parameter set: channel 13
          DS Parameter set: channel 1
          DS Parameter set: channel 1
          DS Parameter set: channel 1
          DS Parameter set: channel 6
          DS Parameter set: channel 6
          DS Parameter set: channel 11
          DS Parameter set: channel 13

  several APs from different manufacturers are used, no difference

  WPA2-PSK is used

  version.log:
  Ubuntu 3.18.0-9.10-generic 3.18.2

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.18.0-9-generic 3.18.0-9.10
  ProcVersionSignature: Ubuntu 3.18.0-9.10-generic 3.18.2
  Uname: Linux 3.18.0-9-generic x86_64
  ApportVersion: 2.15.1-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  erik       8523 F.... pulseaudio
   /dev/snd/controlC0:  erik       8523 F.... pulseaudio
  CurrentDesktop: LXQt
  Date: Thu Jan 22 19:26:18 2015
  HibernationDevice: RESUME=UUID=ad769441-bb4d-4be0-9cac-5d014f883d3f
  InstallationDate: Installed on 2014-09-14 (130 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140914)
  MachineType: Dell Inc. XPS 12-9Q33
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: \boot\vmlinuz-3.18.0-9-generic.efi.signed ro root=UUID=1551b59c-7fbd-40f7-95c4-47d5359b39dc initrd=boot\initrd.img-3.18.0-9-generic
  RelatedPackageVersions:
   linux-restricted-modules-3.18.0-9-generic N/A
   linux-backports-modules-3.18.0-9-generic  N/A
   linux-firmware                            1.141
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/15/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A06
  dmi.board.name: XPS 12-9Q33
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A06
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: Not Specified
  dmi.modalias: dmi:bvnDellInc.:bvrA06:bd04/15/2014:svnDellInc.:pnXPS12-9Q33:pvrA06:rvnDellInc.:rnXPS12-9Q33:rvrA06:cvnDellInc.:ct8:cvrNotSpecified:
  dmi.product.name: XPS 12-9Q33
  dmi.product.version: A06
  dmi.sys.vendor: Dell Inc.

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References