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Thread: b43 wireless latency problem on laptop when running on battery

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hello,

noticed wireless driver (b43) works
fine when i'm on ac. when plug cable off ,
starts running on battery, pings
2 seconds. how looks like:

64 bytes 192.168.0.1: icmp_req=21 ttl=64 time=1.32 ms
64 bytes 192.168.0.1: icmp_req=22 ttl=64 time=1.31 ms
64 bytes 192.168.0.1: icmp_req=23 ttl=64 time=3.23 ms
64 bytes 192.168.0.1: icmp_req=24 ttl=64 time=1.27 ms
64 bytes 192.168.0.1: icmp_req=25 ttl=64 time=1.30 ms
>>plugged off
64 bytes 192.168.0.1: icmp_req=26 ttl=64 time=17.1 ms
64 bytes 192.168.0.1: icmp_req=15 ttl=64 time=193 ms
64 bytes 192.168.0.1: icmp_req=16 ttl=64 time=2056 ms
64 bytes 192.168.0.1: icmp_req=17 ttl=64 time=1057 ms
64 bytes 192.168.0.1: icmp_req=18 ttl=64 time=58.0 ms
64 bytes 192.168.0.1: icmp_req=19 ttl=64 time=183 ms
64 bytes 192.168.0.1: icmp_req=20 ttl=64 time=410 ms

goes down 1 ms after plug cable back.

config this:
xubuntu 11.10 32 bit desktop
kernel: 3.0.0-14-generic
b43 driver: proprietary (default xubuntu 11.10)

know root cause this?

i saw problem doesn't happen on ubuntu 11.04 kernel
2.6.38-8-generic

results system worse (3ms compared 1.3 ms), constant no matter of ac/dc:

4 bytes 192.168.0.1: icmp_req=9 ttl=64 time=2.79 ms
64 bytes 192.168.0.1: icmp_req=10 ttl=64 time=2.78 ms
64 bytes 192.168.0.1: icmp_req=11 ttl=64 time=3.32 ms
64 bytes 192.168.0.1: icmp_req=12 ttl=64 time=5.02 ms
64 bytes 192.168.0.1: icmp_req=13 ttl=64 time=2.58 ms
64 bytes 192.168.0.1: icmp_req=14 ttl=64 time=3.84 ms
64 bytes 192.168.0.1: icmp_req=15 ttl=64 time=3.37 ms
64 bytes 192.168.0.1: icmp_req=16 ttl=64 time=2.66 ms
64 bytes 192.168.0.1: icmp_req=17 ttl=64 time=3.21 ms
64 bytes 192.168.0.1: icmp_req=18 ttl=64 time=3.53 ms
64 bytes 192.168.0.1: icmp_req=19 ttl=64 time=3.46 ms
64 bytes 192.168.0.1: icmp_req=20 ttl=64 time=3.53 ms
64 bytes 192.168.0.1: icmp_req=21 ttl=64 time=2.90 ms


Forum The Ubuntu Forum Community Ubuntu Official Flavours Support Networking & Wireless [xubuntu] b43 wireless latency problem on laptop when running on battery


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