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#1 2013-03-22 23:10:38

hexblk
Member
Registered: 2013-03-22
Posts: 3

[SOLVED]b43 drops network access on bcm4312 network card

hi,
My network card is
04:00.0 Network controller: Broadcom Corporation BCM4312 802.11b/g LP-PHY (rev 01)
Firmware installed is b43.

 b43-phy0: Loading firmware version 666.2 (2011-02-23 01:15:07)

I dont have wl installed. Initial scanning shows the AP correctly and wpa_supplicant seems to associate it.  I can get network access, which lasts for about 20 seconds. Even after that the AP is still associated.

Checking after a minute shows AP is no longer associated. Scanning returns no result after that whatsoever. Here's the dmesg output.

~]$ dmesg | grep wlan0
[  227.223975] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 1558.622608] wlan0: authenticate with 00:23:54:37:e9:19
[ 1558.635617] wlan0: capabilities/regulatory prevented using AP HT/VHT configuration, downgraded
[ 1558.635893] wlan0: send auth to 00:23:54:37:e9:19 (try 1/3)
[ 1558.638090] wlan0: authenticated
[ 1558.638130] b43 ssb0:0 wlan0: disabling HT/VHT due to WEP/TKIP use
[ 1558.638136] b43 ssb0:0 wlan0: disabling HT as WMM/QoS is not supported by the AP
[ 1558.638140] b43 ssb0:0 wlan0: disabling VHT as WMM/QoS is not supported by the AP
[ 1558.638609] wlan0: associate with 00:23:54:37:e9:19 (try 1/3)
[ 1558.641236] wlan0: RX AssocResp from 00:23:54:37:e9:19 (capab=0x411 status=0 aid=2)
[ 1558.642415] wlan0: associated
[ 1558.642453] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[ 1704.569013] ieee80211 phy0: wlan0: No probe response from AP 00:23:54:37:e9:19 after 500ms, disconnecting.
[ 1705.893463] wlan0: authenticate with 00:23:54:37:e9:19
[ 1705.906625] wlan0: capabilities/regulatory prevented using AP HT/VHT configuration, downgraded
[ 1705.906828] wlan0: send auth to 00:23:54:37:e9:19 (try 1/3)
[ 1706.109292] wlan0: send auth to 00:23:54:37:e9:19 (try 2/3)
[ 1706.312223] wlan0: send auth to 00:23:54:37:e9:19 (try 3/3)
[ 1706.515086] wlan0: authentication with 00:23:54:37:e9:19 timed out

Any ideas? thanks.

Last edited by hexblk (2013-03-23 20:48:24)

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#2 2013-03-22 23:26:23

hexblk
Member
Registered: 2013-03-22
Posts: 3

Re: [SOLVED]b43 drops network access on bcm4312 network card

okay so disabling the QOS of the driver seems to solve the problem. I ll just test it some more time to make sure.

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#3 2013-03-23 20:42:02

hexblk
Member
Registered: 2013-03-22
Posts: 3

Re: [SOLVED]b43 drops network access on bcm4312 network card

wish i found this before posting here...adding the line

options b43 pio=1 qos=0

to /etc/modprobe.d/b43.conf did it. Driver does warns that disabling the QOS would result in a decrease in performance, but i couldnt find any other solution. Any ideas on performance of b43 with these settings vs wl?

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#4 2013-04-02 17:14:00

hungerfish
Member
Registered: 2009-09-13
Posts: 242

Re: [SOLVED]b43 drops network access on bcm4312 network card

I'm having a very similar problem, just with bcm4322 (macbook pro 7.1)
I've used Arch on it before, and never had this problem before, but I'm getting the same error message:

ieee80211 phy0: wlan0: No probe response from AP 00:23:54:37:e9:19 after 500ms, disconnecing.

I'll try your workaround, but unless the setting you suggest used to be the default, which I doubt, something smells fishy...
Especially since I've found that I don't always have this problem - I can sometimes boot up, and every-thing's fine, but more often it just constantly disconnects.


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