(no subject)

[Vasil Lalov]

Hello,

I am seeing some weird behavior with the iwlagn driver from linuxwireless.com:

My Intel 5300 wireless card will randomly disassociate itself from the
access point. It happens with or without security enabled. It only
happens when using the 802.11n mode. I've noticed that the further
away I am from the AP, the LOWER the chances of this to happen. If I
put my laptop within 2-3 feet from the access point, the wireless card
will disassociate itself on average once every 30 seconds.

Here is some data:

uname -a
Linux red 2.6.31-20-generic #57-Ubuntu SMP Mon Feb 8 09:02:26 UTC 2010
x86_64 GNU/Linux

filename:
/lib/modules/2.6.31-20-generic/updates/drivers/net/wireless/iwlwifi/iwlagn.ko
alias:          iwl4965
license:        GPL
author:         Copyright(c) 2003-2010 Intel Corporation <ilw@linux.intel.com>
version:        in-tree:
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-6050-4.ucode
firmware:       iwlwifi-6000-4.ucode
firmware:       iwlwifi-1000-3.ucode
srcversion:     10AEF71B7C48925A15AC101
alias:          pci:v00008086d00000084sv*sd00001316bc*sc*i*
alias:          pci:v00008086d00000084sv*sd00001216bc*sc*i*
alias:          pci:v00008086d00000083sv*sd00001326bc*sc*i*
alias:          pci:v00008086d00000083sv*sd00001226bc*sc*i*
alias:          pci:v00008086d00000083sv*sd00001306bc*sc*i*
alias:          pci:v00008086d00000083sv*sd00001206bc*sc*i*
alias:          pci:v00008086d00000084sv*sd00001315bc*sc*i*
alias:          pci:v00008086d00000084sv*sd00001215bc*sc*i*
alias:          pci:v00008086d00000083sv*sd00001325bc*sc*i*
alias:          pci:v00008086d00000083sv*sd00001225bc*sc*i*
alias:          pci:v00008086d00000083sv*sd00001305bc*sc*i*
alias:          pci:v00008086d00000083sv*sd00001205bc*sc*i*
alias:          pci:v00008086d00000089sv*sd00001316bc*sc*i*
alias:          pci:v00008086d00000089sv*sd00001311bc*sc*i*
alias:          pci:v00008086d00000087sv*sd00001326bc*sc*i*
alias:          pci:v00008086d00000087sv*sd00001321bc*sc*i*
alias:          pci:v00008086d00000087sv*sd00001306bc*sc*i*
alias:          pci:v00008086d00000087sv*sd00001301bc*sc*i*
alias:          pci:v00008086d00004239sv*sd00001316bc*sc*i*
alias:          pci:v00008086d00004239sv*sd00001311bc*sc*i*
alias:          pci:v00008086d00004238sv*sd00001111bc*sc*i*
alias:          pci:v00008086d0000422Csv*sd00001326bc*sc*i*
alias:          pci:v00008086d0000422Csv*sd00001321bc*sc*i*
alias:          pci:v00008086d0000422Csv*sd00001307bc*sc*i*
alias:          pci:v00008086d0000422Csv*sd00001306bc*sc*i*
alias:          pci:v00008086d0000422Csv*sd00001301bc*sc*i*
alias:          pci:v00008086d0000422Bsv*sd00001121bc*sc*i*
alias:          pci:v00008086d0000422Bsv*sd00001101bc*sc*i*
alias:          pci:v00008086d0000423Dsv*sd00001316bc*sc*i*
alias:          pci:v00008086d0000423Dsv*sd00001216bc*sc*i*
alias:          pci:v00008086d0000423Dsv*sd00001311bc*sc*i*
alias:          pci:v00008086d0000423Dsv*sd00001211bc*sc*i*
alias:          pci:v00008086d0000423Csv*sd00001321bc*sc*i*
alias:          pci:v00008086d0000423Csv*sd00001221bc*sc*i*
alias:          pci:v00008086d0000423Csv*sd00001306bc*sc*i*
alias:          pci:v00008086d0000423Csv*sd00001206bc*sc*i*
alias:          pci:v00008086d0000423Csv*sd00001301bc*sc*i*
alias:          pci:v00008086d0000423Csv*sd00001201bc*sc*i*
alias:          pci:v00008086d0000423Bsv*sd00001011bc*sc*i*
alias:          pci:v00008086d0000423Asv*sd00001021bc*sc*i*
alias:          pci:v00008086d0000423Asv*sd00001001bc*sc*i*
alias:          pci:v00008086d00004236sv*sd00001114bc*sc*i*
alias:          pci:v00008086d00004236sv*sd00001014bc*sc*i*
alias:          pci:v00008086d00004236sv*sd00001111bc*sc*i*
alias:          pci:v00008086d00004236sv*sd00001011bc*sc*i*
alias:          pci:v00008086d00004235sv*sd00001104bc*sc*i*
alias:          pci:v00008086d00004235sv*sd00001004bc*sc*i*
alias:          pci:v00008086d00004235sv*sd00001101bc*sc*i*
alias:          pci:v00008086d00004235sv*sd00001001bc*sc*i*
alias:          pci:v00008086d00004235sv*sd00001124bc*sc*i*
alias:          pci:v00008086d00004235sv*sd00001024bc*sc*i*
alias:          pci:v00008086d00004235sv*sd00001121bc*sc*i*
alias:          pci:v00008086d00004235sv*sd00001021bc*sc*i*
alias:          pci:v00008086d00004237sv*sd00001316bc*sc*i*
alias:          pci:v00008086d00004237sv*sd00001216bc*sc*i*
alias:          pci:v00008086d00004237sv*sd00001315bc*sc*i*
alias:          pci:v00008086d00004237sv*sd00001215bc*sc*i*
alias:          pci:v00008086d00004237sv*sd00001314bc*sc*i*
alias:          pci:v00008086d00004237sv*sd00001214bc*sc*i*
alias:          pci:v00008086d00004237sv*sd00001311bc*sc*i*
alias:          pci:v00008086d00004237sv*sd00001211bc*sc*i*
alias:          pci:v00008086d00004232sv*sd00001326bc*sc*i*
alias:          pci:v00008086d00004232sv*sd00001226bc*sc*i*
alias:          pci:v00008086d00004232sv*sd00001325bc*sc*i*
alias:          pci:v00008086d00004232sv*sd00001225bc*sc*i*
alias:          pci:v00008086d00004232sv*sd00001324bc*sc*i*
alias:          pci:v00008086d00004232sv*sd00001224bc*sc*i*
alias:          pci:v00008086d00004232sv*sd00001321bc*sc*i*
alias:          pci:v00008086d00004232sv*sd00001221bc*sc*i*
alias:          pci:v00008086d00004232sv*sd00001306bc*sc*i*
alias:          pci:v00008086d00004232sv*sd00001206bc*sc*i*
alias:          pci:v00008086d00004232sv*sd00001305bc*sc*i*
alias:          pci:v00008086d00004232sv*sd00001205bc*sc*i*
alias:          pci:v00008086d00004232sv*sd00001304bc*sc*i*
alias:          pci:v00008086d00004232sv*sd00001204bc*sc*i*
alias:          pci:v00008086d00004232sv*sd00001301bc*sc*i*
alias:          pci:v00008086d00004232sv*sd00001201bc*sc*i*
alias:          pci:v00008086d00004230sv*sd*bc*sc*i*
alias:          pci:v00008086d00004229sv*sd*bc*sc*i*
depends:        iwlcore,mac80211,compat_firmware_class,cfg80211
vermagic:       2.6.31-20-generic SMP mod_unload modversions
parm:           swcrypto50:using software crypto engine (default 0 [hardware])
 (bool)
parm:           queues_num50:number of hw queues in 50xx series (int)
parm:           11n_disable50:disable 50XX 11n functionality (int)
parm:           amsdu_size_8K50:enable 8K amsdu size in 50XX series (int)
parm:           fw_restart50:restart firmware in case of error (int)
parm:           antenna:select antenna (1=Main, 2=Aux, default 0 [both]) (int)
parm:           swcrypto:using crypto in software (default 0 [hardware]) (int)
parm:           disable_hw_scan:disable hardware scanning (default 0) (int)
parm:           queues_num:number of hw queues. (int)
parm:           11n_disable:disable 11n functionality (int)
parm:           amsdu_size_8K:enable 8K amsdu size (int)
parm:           fw_restart4965:restart firmware in case of error (int)


The error messages in dmesg:

iwlagn 0000:0c:00.0: Microcode SW error detected.  Restarting 0x2000000.
[40595.037808] iwlagn 0000:0c:00.0: Start IWL Error Log Dump:
[40595.037814] iwlagn 0000:0c:00.0: Status: 0x000212E4, count: 5
[40595.037945] iwlagn 0000:0c:00.0: Desc
Time       data1      data2      line
[40595.037954] iwlagn 0000:0c:00.0: NMI_INTERRUPT_WDG            (#04)
3570070946 0x00000002 0x07030000 3664
[40595.037960] iwlagn 0000:0c:00.0: blink1  blink2  ilink1  ilink2
[40595.037966] iwlagn 0000:0c:00.0: 0x005AA 0x006E8 0x008B2 0x02294
[40595.037972] iwlagn 0000:0c:00.0: CSR values:
[40595.037976] iwlagn 0000:0c:00.0: (2nd byte of CSR_INT_COALESCING is
CSR_INT_PERIODIC_REG)
[40595.037986] iwlagn 0000:0c:00.0:        CSR_HW_IF_CONFIG_REG: 0X00480301
[40595.037994] iwlagn 0000:0c:00.0:          CSR_INT_COALESCING: 0X00000040
[40595.038003] iwlagn 0000:0c:00.0:                     CSR_INT: 0X04000000
[40595.038012] iwlagn 0000:0c:00.0:                CSR_INT_MASK: 0X00000000
[40595.038020] iwlagn 0000:0c:00.0:           CSR_FH_INT_STATUS: 0X00000000
[40595.038029] iwlagn 0000:0c:00.0:                 CSR_GPIO_IN: 0X00000000
[40595.038037] iwlagn 0000:0c:00.0:                   CSR_RESET: 0X00000000
[40595.038046] iwlagn 0000:0c:00.0:                CSR_GP_CNTRL: 0X080403c5
[40595.038054] iwlagn 0000:0c:00.0:                  CSR_HW_REV: 0X00000024
[40595.038062] iwlagn 0000:0c:00.0:              CSR_EEPROM_REG: 0X00000000
[40595.038071] iwlagn 0000:0c:00.0:               CSR_EEPROM_GP: 0X90000004
[40595.038079] iwlagn 0000:0c:00.0:              CSR_OTP_GP_REG: 0X00060000
[40595.038088] iwlagn 0000:0c:00.0:                 CSR_GIO_REG: 0X00080046
[40595.038096] iwlagn 0000:0c:00.0:            CSR_GP_UCODE_REG: 0X00004547
[40595.038104] iwlagn 0000:0c:00.0:           CSR_GP_DRIVER_REG: 0X00000000
[40595.038112] iwlagn 0000:0c:00.0:           CSR_UCODE_DRV_GP1: 0X00000000
[40595.038121] iwlagn 0000:0c:00.0:           CSR_UCODE_DRV_GP2: 0X00000000
[40595.038129] iwlagn 0000:0c:00.0:                 CSR_LED_REG: 0X00000058
[40595.038138] iwlagn 0000:0c:00.0:        CSR_DRAM_INT_TBL_REG: 0X88110576
[40595.038146] iwlagn 0000:0c:00.0:        CSR_GIO_CHICKEN_BITS: 0X27800200
[40595.038154] iwlagn 0000:0c:00.0:             CSR_ANA_PLL_CFG: 0X00880300
[40595.038163] iwlagn 0000:0c:00.0:           CSR_HW_REV_WA_REG: 0X0001001a
[40595.038171] iwlagn 0000:0c:00.0:        CSR_DBG_HPET_MEM_REG: 0Xffff0000
[40595.038176] iwlagn 0000:0c:00.0: FH register values:
[40595.038194] iwlagn 0000:0c:00.0:
FH_RSCSR_CHNL0_STTS_WPTR_REG: 0X1100a800
[40595.038212] iwlagn 0000:0c:00.0:
FH_RSCSR_CHNL0_RBDCB_BASE_REG: 0X01105640
[40595.038231] iwlagn 0000:0c:00.0:
FH_RSCSR_CHNL0_WPTR: 0X00000078
[40595.038249] iwlagn 0000:0c:00.0:
FH_MEM_RCSR_CHNL0_CONFIG_REG: 0X80819104
[40595.038267] iwlagn 0000:0c:00.0:
FH_MEM_RSSR_SHARED_CTRL_REG: 0X000000fc
[40595.038286] iwlagn 0000:0c:00.0:
FH_MEM_RSSR_RX_STATUS_REG: 0X07030000
[40595.038304] iwlagn 0000:0c:00.0:
FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV: 0X00000000
[40595.038322] iwlagn 0000:0c:00.0:
FH_TSSR_TX_STATUS_REG: 0X07ff0001
[40595.038340] iwlagn 0000:0c:00.0:
FH_TSSR_TX_ERROR_REG: 0X00000000
[40595.038402] iwlagn 0000:0c:00.0: Start IWL Event Log Dump: display
last 20 entries
[40595.038426] iwlagn 0000:0c:00.0: EVT_LOGT:2749976970:0x0000010f:0106
[40595.038441] iwlagn 0000:0c:00.0: EVT_LOGT:2749976972:0x00000000:0301
[40595.038456] iwlagn 0000:0c:00.0: EVT_LOGT:2749977046:0x00000261:0353
[40595.038471] iwlagn 0000:0c:00.0: EVT_LOGT:2749977367:0x0000010f:0106
[40595.038485] iwlagn 0000:0c:00.0: EVT_LOGT:2749977369:0x00000000:0302
[40595.038500] iwlagn 0000:0c:00.0: EVT_LOGT:2749977395:0x00000436:0323
[40595.038515] iwlagn 0000:0c:00.0: EVT_LOGT:2749977417:0x00000000:1350
[40595.038530] iwlagn 0000:0c:00.0: EVT_LOGT:2749977418:0x00000000:1351
[40595.038545] iwlagn 0000:0c:00.0: EVT_LOGT:2749977418:0x00000001:1352
[40595.038559] iwlagn 0000:0c:00.0: EVT_LOGT:2749977419:0x00000002:1353
[40595.038575] iwlagn 0000:0c:00.0: EVT_LOGT:2749977474:0x000000d4:0322
[40595.038590] iwlagn 0000:0c:00.0: EVT_LOGT:2749977641:0x0000010f:0106
[40595.038604] iwlagn 0000:0c:00.0: EVT_LOGT:2749977642:0x00000000:0302
[40595.038619] iwlagn 0000:0c:00.0: EVT_LOGT:2749977668:0x00000436:0323
[40595.038634] iwlagn 0000:0c:00.0: EVT_LOGT:2749977690:0x00000000:1350
[40595.038649] iwlagn 0000:0c:00.0: EVT_LOGT:2749977690:0x00000000:1351
[40595.038664] iwlagn 0000:0c:00.0: EVT_LOGT:2749977691:0x00000001:1352
[40595.038678] iwlagn 0000:0c:00.0: EVT_LOGT:2749977691:0x00000002:1353
[40595.038693] iwlagn 0000:0c:00.0: EVT_LOGT:2750177633:0x000000d7:0123
[40595.038708] iwlagn 0000:0c:00.0: EVT_LOGT:2750177641:0x00000000:0125
[40595.101312] iwlagn 0000:0c:00.0: Stopping AGG while state not ON or starting
[40595.101318] iwlagn 0000:0c:00.0: queue number out of range: 0, must
be 10 to 19
[40595.101340] iwlagn 0000:0c:00.0: Stopping AGG while state not ON or starting
[40595.101343] iwlagn 0000:0c:00.0: queue number out of range: 0, must
be 10 to 19
[40595.146001] iwlagn 0000:0c:00.0: iwl_tx_agg_start on ra =
00:26:5a:f5:73:3a tid = 0
[40600.324551] iwlagn 0000:0c:00.0: iwl_tx_agg_start on ra =
00:26:5a:f5:73:3a tid = 0
[40600.540126] No probe response from AP 00:26:5a:f5:73:3a after
500ms, disconnecting.
[40600.572606] mac80211-phy0: failed to remove key (0,
00:26:5a:f5:73:3a) from hardware (-22)
[40600.640467] cfg80211: All devices are disconnected, going to
restore regulatory settings
[40600.640481] cfg80211: Restoring regulatory settings
[40600.640489] cfg80211: Calling CRDA to update world regulatory domain
[40600.653155] cfg80211: World regulatory domain updated:
[40600.653163]     (start_freq - end_freq @ bandwidth),
(max_antenna_gain, max_eirp)
[40600.653170]     (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[40600.653177]     (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[40600.653183]     (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[40600.653190]     (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[40600.653196]     (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[40620.132020] wlan0: authenticate with 00:26:5a:f5:73:3a (try 1)
[40620.137290] wlan0: authenticated
[40620.137341] wlan0: associate with 00:26:5a:f5:73:3a (try 1)
[40620.142828] wlan0: RX AssocResp from 00:26:5a:f5:73:3a (capab=0x431
status=0 aid=1)
[40620.142832] wlan0: associated
[40622.631049] iwlagn 0000:0c:00.0: iwl_tx_agg_start on ra =
00:26:5a:f5:73:3a tid = 0


Any suggestions?

Re:

[reinette chatre]

On Wed, 2010-03-17 at 06:13 -0700, Vasil Lalov wrote:

> The error messages in dmesg:
> 
> iwlagn 0000:0c:00.0: Microcode SW error detected.  Restarting 0x2000000.
> [40595.037808] iwlagn 0000:0c:00.0: Start IWL Error Log Dump:
> [40595.037814] iwlagn 0000:0c:00.0: Status: 0x000212E4, count: 5
> [40595.037945] iwlagn 0000:0c:00.0: Desc
> Time       data1      data2      line
> [40595.037954] iwlagn 0000:0c:00.0: NMI_INTERRUPT_WDG            (#04)
> 3570070946 0x00000002 0x07030000 3664

[...]

> [40595.101312] iwlagn 0000:0c:00.0: Stopping AGG while state not ON or starting
> [40595.101318] iwlagn 0000:0c:00.0: queue number out of range: 0, must
> be 10 to 19
> [40595.101340] iwlagn 0000:0c:00.0: Stopping AGG while state not ON or starting
> [40595.101343] iwlagn 0000:0c:00.0: queue number out of range: 0, must
> be 10 to 19

This looks similar to https://bugzilla.kernel.org/show_bug.cgi?id=15374
- could you please update your kernel to 2.6.33 and try the patches
attached to that bug report?

Reinette

Re:

[Vasil Lalov]

Reinett,

Thanks for responding to this. I also noticed other things. It seems
that this Microcode SW error occurs because the wifi card is
overheating. When used in n-mode and there is a large file transfer,
the temperature of the card rises to over 62C. Soon after this, the
microcode error occurs and the card gets disassociated.

Doing more research on the power vs temperature problem, I discovered
that other users are seeing this as well. Some have solved their
problem by enabling the power management for the wifi card by issuing

iwconfig wlan0 power on

Others, completely disabled the power management and forced a fixed,
lower power level by issuing

 echo 8 > /sys/bus/pci/drivers/iwlagn/0000\:06\:00.0/power_level

Also, what I have noticed is that if I have my laptop very very close
to the Access Point (1-3 feet) then this error is more likely to
happen. If I move the laptop further away, say more than 15-20 feet,
this error stops occurring so frequently.

Unfortunately, I cannot upgrade to 2.6.33 kernel as it is currently
not available for my distribution and I am reluctant to recompile my
own kernel.

Vasil

===
Vasil Lalov
Sr. Systems Manager
Chicago Public Library


On Fri, Mar 19, 2010 at 1:05 AM, reinette chatre
<reinette.chatre@intel.com> wrote:
> On Wed, 2010-03-17 at 06:13 -0700, Vasil Lalov wrote:
>
>> The error messages in dmesg:
>>
>> iwlagn 0000:0c:00.0: Microcode SW error detected.  Restarting 0x2000000.
>> [40595.037808] iwlagn 0000:0c:00.0: Start IWL Error Log Dump:
>> [40595.037814] iwlagn 0000:0c:00.0: Status: 0x000212E4, count: 5
>> [40595.037945] iwlagn 0000:0c:00.0: Desc
>> Time       data1      data2      line
>> [40595.037954] iwlagn 0000:0c:00.0: NMI_INTERRUPT_WDG            (#04)
>> 3570070946 0x00000002 0x07030000 3664
>
> [...]
>
>> [40595.101312] iwlagn 0000:0c:00.0: Stopping AGG while state not ON or starting
>> [40595.101318] iwlagn 0000:0c:00.0: queue number out of range: 0, must
>> be 10 to 19
>> [40595.101340] iwlagn 0000:0c:00.0: Stopping AGG while state not ON or starting
>> [40595.101343] iwlagn 0000:0c:00.0: queue number out of range: 0, must
>> be 10 to 19
>
> This looks similar to https://bugzilla.kernel.org/show_bug.cgi?id=15374
> - could you please update your kernel to 2.6.33 and try the patches
> attached to that bug report?
>
> Reinette
>
>
>

Re: Re:

[reinette chatre]

On Fri, 2010-03-19 at 09:49 -0700, Vasil Lalov wrote:
> Thanks for responding to this. I also noticed other things. It seems
> that this Microcode SW error occurs because the wifi card is
> overheating. When used in n-mode and there is a large file transfer,
> the temperature of the card rises to over 62C. Soon after this, the
> microcode error occurs and the card gets disassociated.
> 
> Doing more research on the power vs temperature problem, I discovered
> that other users are seeing this as well. Some have solved their
> problem by enabling the power management for the wifi card by issuing

I am not familiar with these workarounds. Could you please submit a new
bug at http://bugzilla.intellinuxwireless.org/ or add your information
to a bug in this system if you find one that is related? 

Reinette

Re: Re:

[Vasil Lalov]

Reinette,

Thanks a lot for directing me to the right place. I will open up a new
bugreport right away!
Have a good weekend!

Vasil
===
Vasil Lalov
Sr. Systems Administrator
Chicago Public Library


On Fri, Mar 19, 2010 at 12:10 PM, reinette chatre
<reinette.chatre@intel.com> wrote:
> On Fri, 2010-03-19 at 09:49 -0700, Vasil Lalov wrote:
>> Thanks for responding to this. I also noticed other things. It seems
>> that this Microcode SW error occurs because the wifi card is
>> overheating. When used in n-mode and there is a large file transfer,
>> the temperature of the card rises to over 62C. Soon after this, the
>> microcode error occurs and the card gets disassociated.
>>
>> Doing more research on the power vs temperature problem, I discovered
>> that other users are seeing this as well. Some have solved their
>> problem by enabling the power management for the wifi card by issuing
>
> I am not familiar with these workarounds. Could you please submit a new
> bug at http://bugzilla.intellinuxwireless.org/ or add your information
> to a bug in this system if you find one that is related?
>
> Reinette
>
>
>
>