655450 – iwlagn spews "BA scd_flow 0 does not match txq_id 10" and WiFi connection is unstable

Bug 655450 - iwlagn spews "BA scd_flow 0 does not match txq_id 10" and WiFi connection is unstable

Summary: iwlagn spews "BA scd_flow 0 does not match txq_id 10" and WiFi connection is ...

Keywords:
Status:	CLOSED DUPLICATE of bug 648732
Alias:	None
Product:	Fedora
Classification:	Fedora
Component:	kernel
Sub Component:
Version:	14
Hardware:	x86_64
OS:	Linux
Priority:	low
Severity:	high
Target Milestone:	---
Assignee:	Stanislaw Gruszka
QA Contact:	Fedora Extras Quality Assurance
Docs Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+	depends on / blocked

Reported:	2010-11-21 00:51 UTC by VK
Modified:	2024-12-10 21:23 UTC (History)
CC List:	13 users (show)
Fixed In Version:
Clone Of:
Environment:
Last Closed:	2011-01-12 12:38:30 UTC
Type:	---
Embargoed:
Dependent Products:

Attachments	(Terms of Use)

Links
System	ID	Private	Priority	Status	Summary	Last Updated
Intel Wireless Bugzilla	2228	0	None	None	None	Never
Linux Kernel	38632	0	None	None	None	Never

Description VK 2010-11-21 00:51:02 UTC

Description of problem:

Instability of WiFi connection on system using Intel 5300 A/G/N chipset connected to 802.11n access point. Constant errors in /var/log/messages. Found Intel wireless bug report (#2228) against Ubuntu for what appears to be the same. I have appended to that ticket as well.

Version-Release number of selected component (if applicable):

Dell E6500 Laptop with Intel 5300 AGN chipset. Fedora 14 kernel 2.6.35.6-48.fc14.x86_64

modinfo shows:

>filename:       /lib/modules/2.6.35.6-48.fc14.x86_64/kernel/drivers/net/wireless/iwlwifi/iwlagn.ko
alias:          iwl4965
license:        GPL
author:         Copyright(c) 2003-2010 Intel Corporation <ilw.com>
version:        in-tree:d
description:    Intel(R) Wireless WiFi Link AGN driver for Linux
firmware:       iwlwifi-4965-2.ucode
firmware:       iwlwifi-5150-2.ucode
firmware:       iwlwifi-5000-2.ucode
firmware:       iwlwifi-6000g2a-4.ucode
firmware:       iwlwifi-6050-4.ucode
firmware:       iwlwifi-6000-4.ucode
firmware:       iwlwifi-1000-3.ucode
srcversion:     60F4E88BF44FCB9589CC3B3
alias:          pci:v00008086d00000084sv*sd00001316bc*sc*i*
 .
 .
 .



How reproducible:
Easy


Steps to Reproduce:
1. Connect system using this chipset to 802.11n access point using NetworkManager
2. Wait a few minutes
3.
  
Actual results:

Unstable connection

Expected results:

Stable Connection

Additional info:

Excerpts from /var/log/messages:

>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>Nov 19 08:40:12 myhost kernel: [   38.509775] iwlagn: Intel(R) Wireless WiFi Link AGN driver for Linux, in-tree:d
>Nov 19 08:40:12 myhost kernel: [   38.510469] iwlagn: Copyright(c) 2003-2010 Intel Corporation
>Nov 19 08:40:12 myhost kernel: [   38.510982] iwlagn 0000:0c:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
>Nov 19 08:40:12 myhost kernel: [   38.511779] iwlagn 0000:0c:00.0: Detected Intel(R) Ultimate N WiFi Link 5300 AGN, REV=0x24
>Nov 19 08:40:12 myhost kernel: [   38.541206] iwlagn 0000:0c:00.0: Tunable channels: 13 802.11bg, 24 802.11a channels
>Nov 19 08:40:12 myhost kernel: [   38.668396] iwlagn 0000:0c:00.0: loaded firmware version 8.24.2.12
>Nov 19 08:40:13 myhost NetworkManager[1524]: <info> (wlan0): new 802.11 WiFi device (driver: 'iwlagn' ifindex: 3)
>Nov 19 08:44:02 myhost kernel: [  273.783292] iwlagn 0000:0c:00.0: iwlagn_tx_agg_start on ra = c0:c1:c0:XX:XX:XX tid = 0
>Nov 19 08:45:10 myhost kernel: [  341.444471] iwlagn 0000:0c:00.0: Fail finding valid aggregation tid: 6
>Nov 19 08:46:15 myhost kernel: [  405.944067] iwlagn 0000:0c:00.0: iwlagn_tx_agg_start on ra = c0:c1:c0:XX:XX:XX tid = 1
>Nov 19 08:47:53 myhost kernel: [  504.307122] iwlagn 0000:0c:00.0: iwlagn_tx_agg_start on ra = c0:c1:c0:XX:XX:XX tid = 1
>Nov 19 08:51:26 myhost kernel: [  717.371366] iwlagn 0000:0c:00.0: iwlagn_tx_agg_start on ra = c0:c1:c0:XX:XX:XX tid = 6
>Nov 19 09:31:16 myhost kernel: [ 3107.636122] iwlagn 0000:0c:00.0: ACTIVATE a non DRIVER active station id 0 addr c0:c1:c0:XX:XX:XX
>Nov 19 19:53:13 myhost kernel: [36341.592681] iwlagn 0000:0c:00.0: iwlagn_tx_agg_start on ra = c0:c1:c0:XX:XX:XX tid = 0
>Nov 19 20:02:05 myhost kernel: [36872.882759] iwlagn 0000:0c:00.0: Fail finding valid aggregation tid: 6
>Nov 19 20:07:12 myhost kernel: [37179.846758] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 19 20:09:37 myhost kernel: [37324.186627] iwlagn 0000:0c:00.0: Fail finding valid aggregation tid: 6
>Nov 19 20:12:41 myhost kernel: [37508.054491] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 19 20:13:36 myhost kernel: [37562.963157] iwlagn 0000:0c:00.0: iwlagn_tx_agg_start on ra = c0:c1:c0:XX:XX:XX tid = 6
>Nov 19 20:45:34 myhost kernel: [39481.422321] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 19 20:45:34 myhost kernel: [39481.429026] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 19 20:45:34 myhost kernel: [39481.438114] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 19 20:55:56 myhost kernel: [40103.264863] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 19 20:56:01 myhost kernel: [40108.266744] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 19 20:57:52 myhost kernel: [40219.715094] iwlagn 0000:0c:00.0: Fail finding valid aggregation tid: 1
>Nov 19 20:58:18 myhost kernel: [40245.003381] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
> .
> . 
> .
>Nov 20 14:38:51 myhost kernel: [71842.930112] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 14:39:34 myhost kernel: [71885.281443] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 14:41:43 myhost kernel: [72015.183845] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 14:43:16 myhost kernel: [72107.782836] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 14:44:19 myhost kernel: [72170.919026] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 14:44:58 myhost kernel: [72209.447532] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 14:45:54 myhost kernel: [72265.273553] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 14:47:08 myhost kernel: [72340.201916] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 14:47:27 myhost kernel: [72358.533771] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 14:47:50 myhost kernel: [72381.444672] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 14:48:56 myhost kernel: [72447.330244] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 14:49:07 myhost kernel: [72458.808885] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 14:52:11 myhost kernel: [72642.623320] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 14:53:01 myhost kernel: [72692.388195] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 14:53:49 myhost kernel: [72740.274714] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 14:54:08 myhost kernel: [72759.585631] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 14:56:06 myhost kernel: [72877.956569] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 14:56:07 myhost kernel: [72878.496258] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 14:56:07 myhost kernel: [72878.503494] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 14:56:36 myhost kernel: [72907.671827] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 14:59:30 myhost kernel: [73081.744696] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:00:43 myhost kernel: [73154.683213] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:01:34 myhost kernel: [73205.482473] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:01:48 myhost kernel: [73220.168510] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:01:52 myhost kernel: [73223.890552] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:03:57 myhost kernel: [73348.718565] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:04:20 myhost kernel: [73371.750990] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:04:30 myhost kernel: [73381.510001] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:04:44 myhost kernel: [73395.388960] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:07:26 myhost kernel: [73557.598192] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:08:07 myhost kernel: [73599.164966] iwlagn 0000:0c:00.0: Microcode SW error detected.  Restarting 0x2000000.
>Nov 20 15:08:07 myhost kernel: [73599.164978] iwlagn 0000:0c:00.0: Loaded firmware version: 8.24.2.12
>Nov 20 15:08:07 myhost kernel: [73599.164999] iwlagn 0000:0c:00.0: Start IWL Error Log Dump:
>Nov 20 15:08:07 myhost kernel: [73599.165006] iwlagn 0000:0c:00.0: Status: 0x000212E4, count: 5
>Nov 20 15:08:07 myhost kernel: [73599.165164] iwlagn 0000:0c:00.0: Desc                               Time       data1      data2
>   line
>Nov 20 15:08:07 myhost kernel: [73599.165175] iwlagn 0000:0c:00.0: NMI_INTERRUPT_WDG            (#04) 0560566153 0x00000002 0x070300
>00 3664
>Nov 20 15:08:07 myhost kernel: [73599.165182] iwlagn 0000:0c:00.0: pc      blink1  blink2  ilink1  ilink2  hcmd
>Nov 20 15:08:07 myhost kernel: [73599.165190] iwlagn 0000:0c:00.0: 0x006E4 0x005AA 0x006E8 0x008B2 0x0229C 0xA16001C
>Nov 20 15:08:07 myhost kernel: [73599.165197] iwlagn 0000:0c:00.0: CSR values:
>Nov 20 15:08:07 myhost kernel: [73599.165203] iwlagn 0000:0c:00.0: (2nd byte of CSR_INT_COALESCING is CSR_INT_PERIODIC_REG)
>Nov 20 15:08:07 myhost kernel: [73599.165216] iwlagn 0000:0c:00.0:        CSR_HW_IF_CONFIG_REG: 0X00480302
>Nov 20 15:08:07 myhost kernel: [73599.165228] iwlagn 0000:0c:00.0:          CSR_INT_COALESCING: 0X00000040
>Nov 20 15:08:07 myhost kernel: [73599.165239] iwlagn 0000:0c:00.0:                     CSR_INT: 0X00000000
>Nov 20 15:08:07 myhost kernel: [73599.165250] iwlagn 0000:0c:00.0:                CSR_INT_MASK: 0X00000000
>Nov 20 15:08:07 myhost kernel: [73599.165261] iwlagn 0000:0c:00.0:           CSR_FH_INT_STATUS: 0X00000000
>Nov 20 15:08:07 myhost kernel: [73599.165272] iwlagn 0000:0c:00.0:                 CSR_GPIO_IN: 0X00000000
>Nov 20 15:08:07 myhost kernel: [73599.165283] iwlagn 0000:0c:00.0:                   CSR_RESET: 0X00000000
>Nov 20 15:08:07 myhost kernel: [73599.165294] iwlagn 0000:0c:00.0:                CSR_GP_CNTRL: 0X080403c5
>Nov 20 15:08:07 myhost kernel: [73599.165305] iwlagn 0000:0c:00.0:                  CSR_HW_REV: 0X00000024
>Nov 20 15:08:07 myhost kernel: [73599.165316] iwlagn 0000:0c:00.0:              CSR_EEPROM_REG: 0X00000000
>Nov 20 15:08:07 myhost kernel: [73599.165328] iwlagn 0000:0c:00.0:               CSR_EEPROM_GP: 0X90000004
>Nov 20 15:08:07 myhost kernel: [73599.165339] iwlagn 0000:0c:00.0:              CSR_OTP_GP_REG: 0X00060000
>Nov 20 15:08:07 myhost kernel: [73599.165350] iwlagn 0000:0c:00.0:                 CSR_GIO_REG: 0X00080046
>Nov 20 15:08:07 myhost kernel: [73599.165362] iwlagn 0000:0c:00.0:            CSR_GP_UCODE_REG: 0X0000c30a
>Nov 20 15:08:07 myhost kernel: [73599.165373] iwlagn 0000:0c:00.0:           CSR_GP_DRIVER_REG: 0X00000000
>Nov 20 15:08:07 myhost kernel: [73599.165384] iwlagn 0000:0c:00.0:           CSR_UCODE_DRV_GP1: 0X00000000
>Nov 20 15:08:07 myhost kernel: [73599.165395] iwlagn 0000:0c:00.0:           CSR_UCODE_DRV_GP2: 0X00000000
>Nov 20 15:08:07 myhost kernel: [73599.165406] iwlagn 0000:0c:00.0:                 CSR_LED_REG: 0X00000058
>Nov 20 15:08:07 myhost kernel: [73599.165417] iwlagn 0000:0c:00.0:        CSR_DRAM_INT_TBL_REG: 0X880ffffe
>Nov 20 15:08:07 myhost kernel: [73599.165428] iwlagn 0000:0c:00.0:        CSR_GIO_CHICKEN_BITS: 0X27800200
>Nov 20 15:08:07 myhost kernel: [73599.165439] iwlagn 0000:0c:00.0:             CSR_ANA_PLL_CFG: 0X00880300
>Nov 20 15:08:07 myhost kernel: [73599.165450] iwlagn 0000:0c:00.0:           CSR_HW_REV_WA_REG: 0X0001001a
>Nov 20 15:08:07 myhost kernel: [73599.165462] iwlagn 0000:0c:00.0:        CSR_DBG_HPET_MEM_REG: 0Xffff0000
>Nov 20 15:08:07 myhost kernel: [73599.165470] iwlagn 0000:0c:00.0: FH register values:
>Nov 20 15:08:07 myhost kernel: [73599.165489] iwlagn 0000:0c:00.0:         FH_RSCSR_CHNL0_STTS_WPTR_REG: 0X0fff6e00
>Nov 20 15:08:07 myhost kernel: [73599.165508] iwlagn 0000:0c:00.0:        FH_RSCSR_CHNL0_RBDCB_BASE_REG: 0X00fff6f0
>Nov 20 15:08:07 myhost kernel: [73599.165528] iwlagn 0000:0c:00.0:                  FH_RSCSR_CHNL0_WPTR: 0X000000b0
>Nov 20 15:08:07 myhost kernel: [73599.165547] iwlagn 0000:0c:00.0:         FH_MEM_RCSR_CHNL0_CONFIG_REG: 0X80819104
>Nov 20 15:08:07 myhost kernel: [73599.165566] iwlagn 0000:0c:00.0:          FH_MEM_RSSR_SHARED_CTRL_REG: 0X000000fc
>Nov 20 15:08:07 myhost kernel: [73599.165586] iwlagn 0000:0c:00.0:            FH_MEM_RSSR_RX_STATUS_REG: 0X07030000
>Nov 20 15:08:07 myhost kernel: [73599.165605] iwlagn 0000:0c:00.0:    FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV: 0X00000000
>Nov 20 15:08:07 myhost kernel: [73599.165624] iwlagn 0000:0c:00.0:                FH_TSSR_TX_STATUS_REG: 0X07ff0001
>Nov 20 15:08:07 myhost kernel: [73599.165644] iwlagn 0000:0c:00.0:                 FH_TSSR_TX_ERROR_REG: 0X00000000
>Nov 20 15:08:07 myhost kernel: [73599.165706] iwlagn 0000:0c:00.0: Start IWL Event Log Dump: display last 20 entries
>Nov 20 15:08:07 myhost kernel: [73599.165731] iwlagn 0000:0c:00.0: EVT_LOGT:2844767003:0x00000001:1352
>Nov 20 15:08:07 myhost kernel: [73599.165748] iwlagn 0000:0c:00.0: EVT_LOGT:2844767004:0x00000002:1353
>Nov 20 15:08:07 myhost kernel: [73599.165764] iwlagn 0000:0c:00.0: EVT_LOGT:2844767020:0x01000000:0221
>Nov 20 15:08:07 myhost kernel: [73599.165780] iwlagn 0000:0c:00.0: EVT_LOGT:2844767107:0x0000010f:0106
>Nov 20 15:08:07 myhost kernel: [73599.165796] iwlagn 0000:0c:00.0: EVT_LOGT:2844767108:0x00000000:0302
>Nov 20 15:08:07 myhost kernel: [73599.165812] iwlagn 0000:0c:00.0: EVT_LOGT:2844767121:0x00002000:0350
>Nov 20 15:08:07 myhost kernel: [73599.165829] iwlagn 0000:0c:00.0: EVT_LOGT:2844767126:0x0000010f:0106
>Nov 20 15:08:07 myhost kernel: [73599.165845] iwlagn 0000:0c:00.0: EVT_LOGT:2844767127:0x00000000:0302
>Nov 20 15:08:07 myhost kernel: [73599.165812] iwlagn 0000:0c:00.0: EVT_LOGT:2844767121:0x00002000:0350
>Nov 20 15:08:07 myhost kernel: [73599.165829] iwlagn 0000:0c:00.0: EVT_LOGT:2844767126:0x0000010f:0106
>Nov 20 15:08:07 myhost kernel: [73599.165845] iwlagn 0000:0c:00.0: EVT_LOGT:2844767127:0x00000000:0302
>Nov 20 15:08:07 myhost kernel: [73599.165861] iwlagn 0000:0c:00.0: EVT_LOGT:2844767154:0x00000436:0323
>Nov 20 15:08:07 myhost kernel: [73599.165877] iwlagn 0000:0c:00.0: EVT_LOGT:2844767158:0x0000045c:0367
>Nov 20 15:08:07 myhost kernel: [73599.165893] iwlagn 0000:0c:00.0: EVT_LOGT:2844767159:0x0000037c:0353
>Nov 20 15:08:07 myhost kernel: [73599.165909] iwlagn 0000:0c:00.0: EVT_LOGT:2844767184:0x0000010f:0106
>Nov 20 15:08:07 myhost kernel: [73599.165925] iwlagn 0000:0c:00.0: EVT_LOGT:2844767186:0x00000000:0302
>Nov 20 15:08:07 myhost kernel: [73599.165941] iwlagn 0000:0c:00.0: EVT_LOGT:2844767212:0x00000436:0323
>Nov 20 15:08:07 myhost kernel: [73599.165946] iwlagn 0000:0c:00.0: EVT_LOGT:2844767234:0x00000000:1350
>Nov 20 15:08:07 myhost kernel: [73599.165946] iwlagn 0000:0c:00.0: EVT_LOGT:2844767235:0x00000000:1351
>Nov 20 15:08:07 myhost kernel: [73599.165946] iwlagn 0000:0c:00.0: EVT_LOGT:2844767235:0x00000001:1352
>Nov 20 15:08:07 myhost kernel: [73599.165946] iwlagn 0000:0c:00.0: EVT_LOGT:2844767236:0x00000002:1353
>Nov 20 15:08:07 myhost kernel: [73599.165946] iwlagn 0000:0c:00.0: EVT_LOGT:2844967176:0x000000d7:0123
>Nov 20 15:08:07 myhost kernel: [73599.165946] iwlagn 0000:0c:00.0: EVT_LOGT:2844967184:0x00000000:0125
>Nov 20 15:08:07 myhost kernel: [73599.216521] iwlagn 0000:0c:00.0: Stopping AGG while state not ON or starting
>Nov 20 15:08:07 myhost kernel: [73599.216533] iwlagn 0000:0c:00.0: queue number out of range: 0, must be 10 to 19
>Nov 20 15:10:06 myhost kernel: [73717.672511] iwlagn 0000:0c:00.0: iwlagn_tx_agg_start on ra = c0:c1:c0:XX:XX:XX tid = 0
>Nov 20 15:11:41 myhost kernel: [73812.590580] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:11:46 myhost kernel: [73817.823821] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:12:22 myhost kernel: [73854.144787] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:14:05 myhost kernel: [73957.102530] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:14:30 myhost kernel: [73982.050807] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:14:43 myhost kernel: [73994.897070] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:15:54 myhost kernel: [74065.843587] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:16:15 myhost kernel: [74086.355784] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:16:46 myhost kernel: [74118.185606] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:18:50 myhost kernel: [74241.410509] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:24:38 myhost kernel: [74590.032428] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:29:15 myhost kernel: [74866.685021] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:30:15 myhost kernel: [74926.336443] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:30:45 myhost kernel: [74956.713935] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:30:51 myhost kernel: [74962.740092] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:31:12 myhost kernel: [74983.967384] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:31:22 myhost kernel: [74993.415086] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:32:02 myhost kernel: [75033.255335] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:32:03 myhost kernel: [75034.458448] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:32:08 myhost kernel: [75039.494898] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:32:32 myhost kernel: [75064.037895] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:33:33 myhost kernel: [75125.084636] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:34:17 myhost kernel: [75168.653022] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 15:35:52 myhost kernel: [75263.805273] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>
> .
> .
> . 
>Nov 20 17:19:34 myhost kernel: [81486.137814] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 17:21:26 myhost kernel: [81597.353166] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 17:22:36 myhost kernel: [81667.854726] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 17:22:43 myhost kernel: [81674.694569] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 17:23:55 myhost kernel: [81747.115009] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 17:24:20 myhost kernel: [81771.305055] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 17:24:45 myhost kernel: [81797.003991] iwlagn 0000:0c:00.0: low ack count detected, restart firmware
>Nov 20 17:24:45 myhost kernel: [81797.004003] iwlagn 0000:0c:00.0: On demand firmware reload
>Nov 20 17:24:45 myhost kernel: [81797.055709] iwlagn 0000:0c:00.0: Stopping AGG while state not ON or starting
>Nov 20 17:24:45 myhost kernel: [81797.055722] iwlagn 0000:0c:00.0: queue number out of range: 0, must be 10 to 19
>Nov 20 17:24:45 myhost kernel: [81797.055790] iwlagn 0000:0c:00.0: Stopping AGG while state not ON or starting
>Nov 20 17:24:45 myhost kernel: [81797.055799] iwlagn 0000:0c:00.0: queue number out of range: 0, must be 10 to 19
>Nov 20 17:26:37 myhost kernel: [81908.817016] iwlagn 0000:0c:00.0: iwlagn_tx_agg_start on ra = c0:c1:c0:XX:XX:XX tid = 0
>Nov 20 17:26:47 myhost kernel: [81918.586082] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 17:28:26 myhost kernel: [82017.882800] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 17:28:31 myhost kernel: [82022.513516] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 17:28:44 myhost kernel: [82036.101331] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 17:29:48 myhost kernel: [82099.561315] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 17:31:15 myhost kernel: [82186.517328] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 17:32:17 myhost kernel: [82248.974675] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
>Nov 20 17:33:08 myhost kernel: [82300.147681] iwlagn 0000:0c:00.0: Fail finding valid aggregation tid: 6
>Nov 21 17:36:27 myhost kernel: [82498.962883] iwlagn 0000:0c:00.0: BA scd_flow 0 does not match txq_id 10
> . 
> .
> .
>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Comment 1 Nicolas Chauvet (kwizart) 2010-11-30 09:20:13 UTC

Re-assigned to the kernel.

Comment 2 Stanislaw Gruszka 2010-12-01 09:44:13 UTC

There is workaround for that issue:

echo "options iwlagn 11n_disable50=1 11n_disable=1" >> /etc/modprobe.d/iwlwifi.conf

Also problem is gone in 2.6.36 kernel, but exact commit which fix that is not know so far.

Comment 3 VK 2010-12-02 05:02:20 UTC

RE: Workaround: does this disable 802.11n speeds and drop to older speeds? If so, it's equivalent to "don't use WiFi" as a workaround, since that's the whole point of my using this chipset/laptop 8-(  (Yeah, I know it means more stability at least). I was hoping the "known uCode" issue mentioned in Intel Wireless BZ 2228 would be the start of the path to a fix.

As for the 2.6.36 magic fix, that's interesting ... I don't suppose there is a newer iwlagn driver + micro-code?

Comment 4 Stanislaw Gruszka 2010-12-02 10:19:18 UTC

(In reply to comment #3)
> RE: Workaround: does this disable 802.11n speeds and drop to older speeds?
Yes.

> If
> so, it's equivalent to "don't use WiFi" as a workaround, since that's the whole
> point of my using this chipset/laptop 8-(
It does not make huge difference when watching web pages.

> As for the 2.6.36 magic fix, that's interesting ... I don't suppose there is a
> newer iwlagn driver + micro-code?
Micro-code (firmware) does not change. Each kernel release include updated driver with a new patches (usually a lot of patches, they fix some things and broke some others).

Comment 5 Pekka Pietikäinen 2011-01-12 12:38:30 UTC

2.6.37 from rawhide is "better" but still fails eventually (1-2 days vs. 10 mins), with slightly different errors. I saw a patch that just disabled tx aggregation vs. 11n completely (could have been bugzilla.kernel.org) that apparently works around the issue nicely, and you still get 11n-speed downloads that way, that's not in .37 I think. Can't find it now, though.

Dupe of #648732 , mind you. Marking as dupe and adding relevant comments from here to that one.

*** This bug has been marked as a duplicate of bug 648732 ***

Note You need to log in before you can comment on or make changes to this bug.