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Old 08-23-2011, 08:43 AM   #1
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b43 with BCM 4312 , system freezes .

I have a Dell 1397 { Broadcom BCM 4312 [ 14e4 : 4315 ] } in my Dell Inspiron 1464 .

I am facing constant problem with the card on Ubuntu 10.04 and BackTrack 5 / BackTrack 5 R1 with B43 drivers for the last 6 months and have tried all most everything I could get hold off to solve the problem but was unable to .

This is what happens :

I install the drivers according to the instructions as given on you site . It goes without a problem .

I reboot the system and as the root user

Scan for networks using : iwlist wlan0 scan

The networks show up .

Connect to the network using : iwconfig wlan0 essid "IIST-H1-DHRUVA"

IIST-H1-DHRUVA being the network name .

Goes well .

Request an IP address using : dhclient wlan0

So far , so good .

Now I start using the internet . It works for a while and then stops responding . I have not yet figured out if it is after a certain time period or after a certain amount of data transfer but the working period is pretty small , about 15 to 30 seconds after getting connected . After this , I am not able to transfer any data nor reconnect and am forced to reboot and the whole cycle starts over again .

The description given is with respect to BackTrack 5 R1 .

The problem is slightly different in Ubuntu 10.04 where the entire system stops responding and I am forced to Force Reboot using the Power button .

These details might prove useful

uname -a
lspci -vvn | grep 43 -A7

I have attached the output of the commands in log(.txt) files attached alongwith .
Attached Files
File Type: txt dmesg.txt (69.3 KB, 9 views)
File Type: txt lspci.txt (7.0 KB, 8 views)
File Type: txt uname.txt (80 Bytes, 5 views)
Old 08-24-2011, 01:10 AM   #2
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Can you post /var/log/kern.log as well?
Old 08-24-2011, 05:46 AM   #3
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Hey sag47 ,

Here is the file you asked for .]kern.log
(The file is larger than 256 KB )
But I am afraid it might not have the information of the same event as in the other logs . If that is is case , just let me know the files you want and I will upload a fresh copy of all of them with the most recent instance of the problem .
Make sure you download it as soon as possible as the link expires in 7 days .

Thank you .


b43, backtrack, bcm4312, broadcom, ubuntu.

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