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Old 03-13-2011, 06:56 AM
Vivek Periaraj
 
Default Bug#617962: Network module b44 gets disconnected frequently

Package: linux-image
Version: 2.6.37-2-686

Every now and then, my ethernet connection gets disconnected in kernel
2.6.37-2. After few seconds, the link re-establishes itself and I can connect
to internet just fine. I am using b44 for the following card:

03:00.0 Ethernet controller: Broadcom Corporation BCM4401-B0 100Base-TX (rev
02)

The problem is severe when I use VPN connection using tun module. Since b44
goes on and off, sometimes there is kernel panic, so I have to hard reboot.

I read somewhere else that using dhclient instead of dhcp fixes this problem.
But debian doesn't have this client? When I have downgrade the kernel to
2.6.32-5-686. I don't see this problem.

Lots of following messages are present in the logs:

[ 3110.988111] b44 ssb0:0: eth0: Link is down
[ 3113.988198] b44 ssb0:0: eth0: Link is up at 100 Mbps, full duplex
[ 3113.988202] b44 ssb0:0: eth0: Flow control is off for TX and off for RX
[ 3134.988154] b44 ssb0:0: eth0: Link is down
[ 3137.988244] b44 ssb0:0: eth0: Link is up at 100 Mbps, full duplex
[ 3137.988249] b44 ssb0:0: eth0: Flow control is off for TX and off for RX
[ 3183.988130] b44 ssb0:0: eth0: Link is down
[ 3186.988206] b44 ssb0:0: eth0: Link is up at 100 Mbps, full duplex
[ 3186.988214] b44 ssb0:0: eth0: Flow control is off for TX and off for RX
[ 3231.988107] b44 ssb0:0: eth0: Link is down
[ 3385.944270] b44 ssb0:0: eth0: powering down PHY
[ 3387.252244] b44 0000:03:00.0: PCI INT A disabled
[ 3401.788072] b44 0000:03:00.0: BAR 0: set to [mem 0xef9fe000-0xef9fffff]
(PCI address [0xef9fe000-0xef9fffff])
[ 3401.788089] b44 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
[ 3401.848205] ssb: Sonics Silicon Backplane found on PCI device 0000:03:00.0
[ 3401.848317] b44: b44.c:v2.0
[ 3401.869448] b44 ssb0:0: eth0: Broadcom 44xx/47xx 10/100BaseT Ethernet
00:18:8b:a2:31:e0
[ 3402.073367] ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 3538.000197] b44 ssb0:0: eth0: Link is up at 100 Mbps, full duplex
[ 3538.000201] b44 ssb0:0: eth0: Flow control is off for TX and off for RX
[ 3538.000435] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 3641.732247] b44 ssb0:0: eth0: powering down PHY
[ 3644.412951] ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 3647.988244] b44 ssb0:0: eth0: Link is up at 100 Mbps, full duplex
[ 3647.988252] b44 ssb0:0: eth0: Flow control is off for TX and off for RX
[ 3647.988500] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 4020.988136] b44 ssb0:0: eth0: Link is down
[ 4023.988199] b44 ssb0:0: eth0: Link is up at 100 Mbps, full duplex
[ 4023.988205] b44 ssb0:0: eth0: Flow control is off for TX and off for RX
[ 4396.988122] b44 ssb0:0: eth0: Link is down
[ 4399.988197] b44 ssb0:0: eth0: Link is up at 100 Mbps, full duplex
[ 4399.988202] b44 ssb0:0: eth0: Flow control is off for TX and off for RX


lsmod |grep b44
b44 18472 0
ssb 33714 1 b44
mii 2714 1 b44

Thanks,
Vivek.


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Old 03-14-2011, 01:00 AM
Vivek Periaraj
 
Default Bug#617962: Network module b44 gets disconnected frequently

I have been using kernel 2.6.32 to get around this issue, but I am able to see
the same problem in this kernel too. So it appears, lot of browsing triggers
this.



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