1. Steps I took that caused me to encounter the problem: disconnect the A/C power cable from the laptop, laptop then runs on battery power
2. expected behavior: same network speed as on A/C power 3. behaviour actually encoutered: very slow network speed network speed on A/C power: bheinsius@bheinsius-Latitude-E6400:~$ ping 192.168.0.1 PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data. 64 bytes from 192.168.0.1: icmp_req=1 ttl=64 time=1.62 ms 64 bytes from 192.168.0.1: icmp_req=2 ttl=64 time=1.29 ms 64 bytes from 192.168.0.1: icmp_req=3 ttl=64 time=1.29 ms 64 bytes from 192.168.0.1: icmp_req=4 ttl=64 time=1.42 ms network speed on battery power: bheinsius@bheinsius-Latitude-E6400:~$ ping 192.168.0.1 PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data. 64 bytes from 192.168.0.1: icmp_req=1 ttl=64 time=43.4 ms 64 bytes from 192.168.0.1: icmp_req=2 ttl=64 time=63.9 ms 64 bytes from 192.168.0.1: icmp_req=3 ttl=64 time=85.6 ms 64 bytes from 192.168.0.1: icmp_req=4 ttl=64 time=108 ms workaround from bug 651008: -- begin quote (This will not fix all problems for all: see comment 24.) Disable the power saving measures implemented by /usr/lib/pm-utils/power.d/wireless. To disable them do: sudo touch /etc/pm/power.d/wireless You now should have an empty file named wireless without the executable bit set in /etc/pm/power.d. Check with: ls -lh /etc/pm/power.d/ You should see a file like this: -rw-r--r-- 1 root root 0 2010-12-31 18:53 wireless Reference: man pm-powersave -- end quote -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/991232 Title: Regression in wireless performance when on battery power (broadcom) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/991232/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
