Problem with b43
Larry Finger
Larry.Finger at lwfinger.net
Tue Jun 22 15:46:33 EDT 2010
On 06/22/2010 01:54 PM, Fabrizio Regalli wrote:
> Gábor, Larry
>
> first of all, excuse me for my mistake: I forget to add in Cc: the ml.
>
> The actual situation is:
>
> ## /etc/modprobe.d/b43.conf ##
>
> options b43 pio=0 qos=0 nohwcrypt=1
>
> I remove network-manager and gnome-network-manager
That step was not necessary. I run under the KDE NetworkManager all the time.
> It seems to recognize correctly the access point:
>
> ## iwconfig ##
>
> wlan0 IEEE 802.11bg ESSID:"XXXXX"
> Mode:Managed Frequency:2.472 GHz Access Point:
> 00:18:4D:2E:85:4A
> Bit Rate=1 Mb/s Tx-Power=20 dBm
> Retry long limit:7 RTS thr:off Fragment thr:off
> Encryption key:off
> Power Management:off
> Link Quality=70/70 Signal level=-21 dBm
> Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
> Tx excessive retries:0 Invalid misc:0 Missed beacon:0
Yes, you are associated.
>
> ## ifconfig ##
>
> wlan0 Link encap:Ethernet HWaddr 00:1d:60:e7:53:b8
> inet addr:192.168.0.100 Bcast:192.168.0.255 Mask:255.255.255.0
> inet6 addr: fe80::21d:60ff:fee7:53b8/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:49 errors:0 dropped:0 overruns:0 frame:0
> TX packets:91 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:4471 (4.3 KiB) TX bytes:12226 (11.9 KiB)
You also have an IP number. Some systems have trouble with IPv6. If you do
not need it, you might disable it.
> but the ping is very horrible and the connection is unstable:
>
>
> ING 192.168.0.2 (192.168.0.2) 56(84) bytes of data.
> 64 bytes from 192.168.0.2 <http://192.168.0.2>: icmp_req=1 ttl=64
> time=2180 ms
> 64 bytes from 192.168.0.2 <http://192.168.0.2>: icmp_req=3 ttl=64
> time=888 ms
>
> 24 packets transmitted, 13 received, 45% packet loss, time 23128ms
> rtt min/avg/max/mdev = 215.307/2399.514/5875.790/1923.942 ms, pipe 6
Yes - awful performance.
>
> ..
>
> I'm using wpa_supplicant with wpa2 authentication Could be this the
> problem?
No. I use WPA2 authentication all the time.
I have no idea what is causing the changes in performance. I do not see
them. My system will go off-line once in a while, but I never see the
dropouts or the very long ping times.
Larry
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