[ath9k-devel] N mode

[Dmitri Seletski <drjoms@gmail.com>]

Luis R. Rodriguez wrote:
> On Wed, Aug 05, 2009 at 09:34:34AM -0700, Dmitri Seletski wrote:
>   
>> Right after i send message strange things started to happen.
>>
>> I didn't use wireless for a while, however, i started to use it now, my
>> land lady insist on it, since she really doesnt like cables in her house.
>>
>> for last couple of days it seemed to work without problems(in g mode),
>> this afternoon i have noticed that connection is shaky. I powerd off/on
>> my access point to improve situation - nothing changed.
>>
>> I decided to take a look at it.
>>
>> I decided to ping another machine connected over access point.
>> i noticed it freezes after some time for short period of time.
>> I decided to look at it over "iw event -t" as well
>> way i pinged other machine: "ping -A"
>> at some stage other machine stopped replying.
>> I looked into "iw event"
>>
>> and got this:
>> 1249487677.365807: wlan0 (phy #0): deauth 00:22:b0:bc:1e:1e ->
>> 00:1e:58:b4:f6:83 reason 4: Disassociated due to inactivity
>>     
>
> That should be your AP telling you that. Can you modify the
> time out of inactivity on your AP?
>  
>   
>> 1249487677.365880: wlan0 (phy #0): disconnected (local request)
>>
>> I believe it happened couple of second later after pings stopped
>> replying, but i may be wrong, as it happened too quickly.
>>
>>
>>
>>
>> iw dev wlan0 scan
>> BSS 00:1e:58:b4:f6:83 (on wlan0)
>>     TSF: 13042924 usec (0d, 00:00:13)
>>     freq: 2442
>>     beacon interval: 25
>>     capability: ESS ShortPreamble ShortSlotTime (0x0421)
>>     signal: -57.00 dBm
>>     SSID: dlink
>>     Supported rates: 1.0* 2.0* 5.5* 11.0* 6.0 9.0 12.0 18.0
>>     DS Paramater set: channel 7
>>     ERP: <no flags>
>>     Extended supported rates: 24.0 36.0 48.0 54.0
>>
>> I manually set wlan0 to use 11M(or less) connection, as my Broadband
>> conenction is 12mbit(and it is very quick), which is rather annoying.
>>     
>
> Your broadband connection throughput has nothing to do with your
> wireless rate selection. Your rate selection is a physical
> characteristic chosen on the device for communication. The bitrate
> is defined by the modulation scheme used (BPSK, QPSK, 16QAM, 64QAM,
> etc) amongst other things.
>
> If you select 54Mbit/s bit rate you won't get exactly 54 MBit/s, the
> bit PHY 54 MBit/s bit rate will be selected and what you actually
> get will vary due to many factors.
>
>   
>> I hope it could be of help.
>>
>> From iwconfig:
>> wlan0     IEEE 802.11bgn  ESSID:"dlink"
>>           Mode:Managed  Frequency:2.442 GHz  Access Point:
>> 00:1E:58:B4:F6:83
>>           Bit Rate=1 Mb/s   Tx-Power=20 dBm
>>           Retry  long limit:7   RTS thr:off   Fragment thr:off
>>           Encryption key:off
>>           Power Management:on
>>           Link Quality=61/70  Signal level=-49 dBm
>>           Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
>>           Tx excessive retries:0  Invalid misc:0   Missed beacon:0
>> (usually link quality warries between 60-70)
>>     
>
> Try to ditch iwconfig, and use iw: iw dev wlan0 link
>
> For more info see:
>
> http://wireless.kernel.org/en/users/Documentation/iw
> http://wireless.kernel.org/en/users/Documentation/iw/replace-iwconfig
>
>   
>> Machine started to suffer with disconnects.
>>
>> Below is fuller log.
>> 1249488753.366831: wlan0 (phy #0): deauth 00:22:b0:bc:1e:1e ->
>> 00:1e:58:b4:f6:83 reason 4: Disassociated due to inactivity
>> 1249488753.366985: wlan0 (phy #0): disconnected (local request)
>> 1249488848.660029: wlan0 (phy #0): auth 00:1e:58:b4:f6:83 ->
>> 00:22:b0:bc:1e:1e status: 0: Successful
>> 1249488848.668387: wlan0 (phy #0): assoc 00:1e:58:b4:f6:83 ->
>> 00:22:b0:bc:1e:1e status: 0: Successful
>> 1249488848.668489: wlan0 (phy #0): connected to 00:1e:58:b4:f6:83
>> 1249488918.365949: wlan0 (phy #0): deauth 00:22:b0:bc:1e:1e ->
>> 00:1e:58:b4:f6:83 reason 4: Disassociated due to inactivity
>>     
>
> Can you tune your AP?
>
>   Luis
>   
Hi guys
I am on the verge of frustration.
I have updated firmware for AP(by an accident found more new version
from Australian mirror of dlink, i dont even know if its legal or not
for me to install that firmware).
I was messing around with combination of sli nvidia/ipv6
I was clearly able to get connected over Nmode and bng moderebooted
computer i can connect over g mode now as well. I know that because i
was able to see from access point client info, which clearly stated
Nmode was working
Now i cant connect over n mode, and i get disconnected once every
minute. i get a lot of these:

1249500223.748309: wlan0 (phy #0): assoc 00:1e:58:b4:f6:83 ->
00:22:b0:bc:1e:1e status: 0: Successful
1249500223.748414: wlan0 (phy #0): connected to 00:1e:58:b4:f6:83
1249500374.770847: wlan0 (phy #0): deauth 00:22:b0:bc:1e:1e ->
00:1e:58:b4:f6:83 reason 4: Disassociated due to inactivity
1249500374.770924: wlan0 (phy #0): disconnected (local request)
1249500389.484218: wlan0 (phy #0): auth 00:1e:58:b4:f6:83 ->
00:22:b0:bc:1e:1e status: 0: Successful
1249500389.492708: wlan0 (phy #0): assoc 00:1e:58:b4:f6:83 ->
00:22:b0:bc:1e:1e status: 0: Successful
1249500389.492815: wlan0 (phy #0): connected to 00:1e:58:b4:f6:83
1249500533.770593: wlan0 (phy #0): deauth 00:22:b0:bc:1e:1e ->
00:1e:58:b4:f6:83 reason 4: Disassociated due to inactivity
1249500533.770706: wlan0 (phy #0): disconnected (local request)
1249500749.108242: wlan0 (phy #0): auth 00:1e:58:b4:f6:83 ->
00:22:b0:bc:1e:1e status: 0: Successful
1249500749.116632: wlan0 (phy #0): assoc 00:1e:58:b4:f6:83 ->
00:22:b0:bc:1e:1e status: 0: Successful
1249500749.116684: wlan0 (phy #0): connected to 00:1e:58:b4:f6:83
1249500758.770179: wlan0 (phy #0): deauth 00:22:b0:bc:1e:1e ->
00:1e:58:b4:f6:83 reason 4: Disassociated due to inactivity
1249500758.770225: wlan0 (phy #0): disconnected (local request)

I started to get a lot of disconnects specifically today, before i
started to tinker with system.
My access point doesn't offer much by means of any time out
configuration.(i don't even know what i am looking for, but again access
point has small amount of options).
If you like i can try to make some sort of a tunnel, that will allow you
to remotely connect to access point. I wont give access to my own PC.

I feel like writing a small script, which will be a loop to connect  my
wifi card to ap.

I am in a very bad situation(if not dire) i wont go into details, but i
am heavily dependent on internet, and I cant use it.
I specifically bought my wifi ap and wlan card, since i knew they were
compatible with linux (same brand, wlan was on chart of being compatible
with linux) if I knew than and there - o wouldnt buy them in the first
place, but than again, how can i buy something that is linux compatible?
I mean, i cant even trust linux compatibility charts anymore, they fail
miserably.

I just need help.
Dmitri