I'm also experiencing this issue using xubuntu - since it is a derivative of ubuntu it makes sense that it appears there also.
It appears this is related to overzealous power management for the wireless card when on battery; on my system the wireless card is eth1 and it's power management setting on battery is 'All packets received'. Switching it off by issuing a ' iwconfig eth1 power off' will fix the issue, and doing something like #!/bin/sh /sbin/iwconfig eth1 power off and saving it as /etc/pm/power.d/wireless will fix it across reboots. There may be better ways to accomplish this whilst still retaining some power management, but this will restore functionality. I agree that there should be some level of power management to help preserve battery life, but the current behavior of power management for wireless cards has a crippling effect on battery power. I consider it a rather critical bug, and suggest that it be addressed as such and a fix pushed out as an update quickly. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/714163 Title: Wireless connection only works fine when wall powered To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/acpi/+bug/714163/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
