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Re: iwlwifi: Reason 7 periodic disconnect

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Could this still happen if power saving is disabled?

Laurentiu

On Tue, Oct 21, 2014, at 10:22, Krishna Chaitanya wrote:
> On Tue, Oct 21, 2014 at 12:34 PM, Emmanuel Grumbach <egrumbach@xxxxxxxxx>
> wrote:
> > On Tue, Oct 21, 2014 at 9:37 AM, Krishna Chaitanya
> > <chaitanya.mgit@xxxxxxxxx> wrote:
> >> On Tue, Oct 21, 2014 at 12:06 PM, Krishna Chaitanya
> >> <chaitanya.mgit@xxxxxxxxx> wrote:
> >>> On Tue, Oct 21, 2014 at 11:01 AM, Emmanuel Grumbach <egrumbach@xxxxxxxxx> wrote:
> >>>> On Tue, Oct 21, 2014 at 8:02 AM, Emmanuel Grumbach <egrumbach@xxxxxxxxx> wrote:
> >>>>> On Mon, Oct 20, 2014 at 10:29 PM, Laurențiu Nicola <lnicola@xxxxxxx> wrote:
> >>>>>> No, nothing in the DD-WRT syslog. The IP seems to be the one cached by
> >>>>>> my DHCP client. I also tried various suggestions found on the internet,
> >>>>>> but nothing helped.
> >>>>>>
> >>>>>
> >>>>> Can you please try to have another device in monitor mode to sniff the
> >>>>> traffic going on?
> >>>>> Felix, can you please tell me when DD-WRT can send a deauth with reason code 7?
> >>>>>
> >>>>> thanks.
> >>>>
> >>>> Can you please disable power save?
> >>>> For this, please make sure you have
> >>>> https://git.kernel.org/cgit/linux/kernel/git/iwlwifi/iwlwifi-fixes.git/commit/?id=f8dfc607b2b460e8e8adfdfb3c5f5bba3a4ad01b
> >>>> or at least have the module parameter.
> >>>> I am wondering if the firmware is not sending frames because of power
> >>>> save toggling.
> >>>>
> >>>> I you could get more extensive logs from the AP it'd be great.
> >>>> Running tracing on the AP would let us know why it thinks we are not associated.
> >>>>
> >>> I have faced the same issue before it happens when DUT is in powersave
> >>> and for some reason AP authenticates (in this case probably due to
> >> *typo: deuauthenticates.
> >>
> >>> inactivity) but as DUT is in power save we don't Rx the deauth (some
> >>> AP's don't wait
> >>> for STA to wakeup and retrieve the deauth frame).
> >>>
> >>> So after that if DUT tries to sent any data frame, as it still thinks
> >>> that it is connected
> >>> (network lost also will not trigger because it still Rx beacon) and in
> >>> that case AP deauthenticates
> >>> us by Reason:7.
> >>>
> >>> May be if we enable tx status report ACK we can pass the inactivity
> >>> check as some AP's
> >>> wont reset inactivity timer for probe's.
> >
> > That seems unlikely - we are kicked out after 1 minute?
> > Let's check, Laurentiu - can you please ping in the background and see
> > what happens?
> 
> Yeah, but some Ap's do that :-)
> Quote from Laurentiu:
> 
> "What I found out in the meanwhile, however, is that active traffic will
> prevent the issue from occurring. This happened with the Fedora Live CD,
> but pinging the AP is also sufficient. I noticed iwconfig reports that
> the power saving mode is off."
> 
> So when traffic is there the issue doesn't happen, so it points to
> inactivity.
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