[ath9k-devel] Can't associate with a particular AP

[Julien Valroff <julien@kirya.net>]

Le dimanche 16 oct. 2011 ? 15:22:45 (+0200 CEST), Mohammed Shafi a ?crit?:
> On Sat, Oct 15, 2011 at 10:21 AM, Julien Valroff <julien@kirya.net> wrote:
> > Hi Mohammed,
> >
> > Le mercredi 05 oct. 2011 ? 06:24:06 (+0200 CEST), Julien Valroff a ?crit?:
> >> Le mardi 04 oct. 2011 ? 20:35:14 (+0200 CEST), Julien Valroff a ?crit?:
> >> > Le mardi 04 oct. 2011 ? 07:46:58 (+0200 CEST), Mohammed Shafi a ?crit?:
> > [...]
> >> > > enabling mac80211 debugs will also be useful. you said that the issue
> >> > > happens without security, and ?also only when the AP router is already
> >> > > connected by another station. in the other thread it was mentioned
> >> > > that the problem occurs only when its a wireless router.
> >> >
> >> > I am compiling a kernel with mac80211 debug features enabled, will make
> >> > further tests within the next week-end and report.
> >>
> >> Please find attached the kernel log with mac80211 debug enabled.
> >
> > Have you been able to reproduce the issue on your side?
> 
> sorry no :(, i used compat-wireless-2011-10-10  and i made sure that
> my ar9285 is to be connected to an AP which is already  connected by
> another station. i did not get the issue. the environment is a less a
> nosier one and the channel is 7 same as yours.

The channel doesn't matter in my case.

> just doubt, why your tx-power is only 14dbm while mine has 27 dbm in
> iwconfig. i assume its just a random sample.  if its consistently
> 14dbm when you connect your AR9285 station first, we need to look at
> that.

It is always 14dbm. Trying to change it manually to a higher value fails:
Error for wireless request "Set Tx Power" (8B26) :
    SET failed on device wlan0 ; Invalid argument.

All my other laptops have 19dBm.

I have also just noticed a new symptom: in order to check the tx-power
value, I have disconnected my other laptops from the AP, rebooted the AP. I
was then able to connect to my AP. When re-connecting another laptop to the
AP, the AR9285 laptop has dropped the connection, and is now unable to
connect again to the AP (until the next AP reboot).

Cheers,
Julien

-- 
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