Hello Toby,
Thank you for your time on helping me with this issue. Right where I
type from at this very moment, the output of iwlist wlan0 scan is the
following:
Cell 05 - Address: 00:0E:2E:92:0F:40
Channel:11
Frequency:2.462 GHz (Channel 11)
Quality=47/70 Signal level=-63 dBm
Encryption key:off
ESSID:"BitWise"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
9 Mb/s; 12 Mb/s; 18 Mb/s
Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=00000177845f819b
Extra: Last beacon: 316ms ago
IE: Unknown: 000742697457697365
IE: Unknown: 010882840B160C121824
IE: Unknown: 03010B
IE: Unknown: 050401030000
IE: Unknown: 2A0104
IE: Unknown: 32043048606C
IE: Unknown: DD0700E04C01020300
The command
iwconfig wlan0 txpower 27 gives an error. I can only set it untill value 20.
Regards,
Attila
2009/7/23 Toby Haynes <thay...@ca.ibm.com>:
> Franczen Attila <francz...@gmail.com>wrote on 20/07/2009 03:21:17 PM:
>
>> Please lend me a hand here. I have made a clean install of Ubuntu
>> Jaunty a few months ago, and suddenly the wireless stopped working.
>> Even without any WPA or other encryption / authentication, my laptop
>> lacks to connect to my router. My wireless is Atheros 5005G, which is
>> identified as AR2413 802.11bg NIC by "lshw -C network", and my laptop
>> is a Toshiba Amilo Pa 1510. The router is fine, because other boxes
>> can connect to it. I recently made a fresh install of Karmik Koala,
>> which is already with the 2.6.31 kernel version, hoping that it was a
>> kernel bug, and it got fixed. No luck in that direction. I have
>> attached some outputs. I hope those are useful. I have also noticed,
>> that if I put my laptop right next to the router, then I get DHCP. If
>> I move further away, the connection is lost.
>
> It sounds like a signal strength issue - if everything works when you are
> right next to the router, then the software side is (probably) not to blame.
> Looking at your iwconfig output, you aren't running at maximum power for the
> interface. Here's my dormant ath0 (you have wlan0) interface.
>
> [r...@nexus6 ~]# iwconfig ath0
> ath0 IEEE 802.11abg ESSID:""
> Mode:Managed Frequency:2.412 GHz Access Point: Not-Associated
> Tx-Power=27 dBm
> Retry min limit:7 RTS thr:off Fragment thr:off
> Encryption key:off
> Power Management:off
> Link Quality:0 Signal level:0 Noise level:0
> Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
> Tx excessive retries:0 Invalid misc:0 Missed beacon:0
>
> A couple of things from my travels in wireless configuration. First, see
> what the card can see when scanning:
>
> iwlist wlan0 scan
>
> This should show a list of access points. See whether you can always see the
> router as you move the laptop further away. Particularly pay attention to
> the Quality line - I seem to have no trouble around Quality 30/70 but higher
> is better.
>
> [r...@nexus6 ~]# iwlist ath0 scan
> ath0 Scan completed :
> Cell 01 - Address: 00:MM:NN:OO:PP:QQ
> Channel:1
> Frequency:2.412 GHz (Channel 1)
> Quality=37/70 Signal level=-73 dBm
> Encryption key:on
> ESSID:""
>
> Make sure that your rate and channel control is automatic and you can also
> override the txpower using iwconfig if it is
>
> iwconfig wlan0 rate auto channel auto
> iwconfig wlan0 txpower 27
>
> or
>
> iwconfig wlan0 auto
>
> You can lock down the rate and channel controls if you know specific
> settings for these (based on experience/ router configuration).
>
> Cheers,
> Toby Haynes
>
_______________________________________________
ath5k-users mailing list
ath5k-users@lists.ath5k.org
https://lists.ath5k.org/mailman/listinfo/ath5k-users
