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SubjectRe: iwlagn is getting very shaky
On Wed, 19 Oct 2011, Norbert Preining wrote:

> Hi everyone
>
> (please Cc),
>
> I am currently running 3.1.0-rc10, and I am having a hard time with
> the wlan network here at the university.
>
> For quite some time, like 10min, it is fine, then suddently the
> iwlagn driver gives up on me and connection is dropped.
>
> In the log file I see:
> [ 172.137011] iwlagn 0000:06:00.0: Tx aggregation enabled on ra = 00:24:c4:ab:bd:ef tid = 0
> [ 821.841016] iwlagn 0000:06:00.0: Tx aggregation enabled on ra = 00:24:c4:ab:bd:ef tid = 6
> [ 1095.580735] wlan0: direct probe to 00:24:c4:ab:bd:e0 (try 1/3)
> [ 1095.780076] wlan0: direct probe to 00:24:c4:ab:bd:e0 (try 2/3)
> [ 1095.980101] wlan0: direct probe to 00:24:c4:ab:bd:e0 (try 3/3)
> [ 1096.180117] wlan0: direct probe to 00:24:c4:ab:bd:e0 timed out
> [ 1105.255464] wlan0: deauthenticating from 00:24:c4:ab:bd:ef by local choice (reason=2)
> [ 1105.255519] iwlagn 0000:06:00.0: Stopping AGG while state not ON or starting
> [ 1105.265581] cfg80211: Calling CRDA for country: JP
> [ 1105.271476] wlan0: authenticate with 00:24:c4:ab:bd:e0 (try 1)
> [ 1105.468105] wlan0: authenticate with 00:24:c4:ab:bd:e0 (try 2)
> [ 1105.668110] wlan0: authenticate with 00:24:c4:ab:bd:e0 (try 3)
> [ 1105.868090] wlan0: authentication with 00:24:c4:ab:bd:e0 timed out
> [ 1113.667890] wlan0: direct probe to 00:24:c4:ab:bd:e0 (try 1/3)
> [ 1113.864116] wlan0: direct probe to 00:24:c4:ab:bd:e0 (try 2/3)
> [ 1114.064095] wlan0: direct probe to 00:24:c4:ab:bd:e0 (try 3/3)
> [ 1114.264109] wlan0: direct probe to 00:24:c4:ab:bd:e0 timed out
>
> Somewhere around 1100 the connection is gone and never comes back again.
>
> I tried removing the driver module from the kernel and reinserting it,
> tried to turn on and off the hardware swithc (rfkill), all without
> no success, the wlan connection remains dead until I reboot.
>
> I am not sure exactely when it started, I guess somewhere in the
> 3.1 cycle, before I was permanently working wiht wlan, now I always
> plug in the cable.
>
> If there is any way to track down this, or any suggestions how I can
> debug it, please let me know.
>
> Hardware: Sony VGN-Z11, Intel(R) WiFi Link 5100 AGN, REV=0x54
> L1 Enabled; Disabling L0S
> device EEPROM VER=0x11e, CALIB=0x4
> Device SKU: 0Xf0
> Tunable channels: 13 802.11bg, 24 802.11a channels
> loaded firmware version 8.83.5.1 build 33692 (EXP)
>
>
> On the other hand, the same laptop with the very same configuration
> works very nicely in my flat's wlan, which is some dirt cheap Japanese
> only wlan router.
>

There have been recent issues in 3.1-rc9 reported with iwlagn, see the
thread at https://lkml.org/lkml/2011/10/15/107 even though you have
different hardware. Adding Wey-Yi Guy from Intel and the linux-wireless
mailing list to the cc.


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