Public bug reported: I am on a macbook (4,1), with the following wireless card:
02:00.0 Network controller: Broadcom Corporation BCM4321 802.11a/b/g/n (rev 03) I'm also running natty with everything (presenty) up-to-date. When I unplug my laptop from a power supply, the wireless goes away after about 2-3 seconds (or less). If i run : sudo iwconfig eth1 power off after this happens, my wireless comes back up. It seems to be something wrong with power management for this card and this hardware? uname -a: Linux Macbuntu 2.6.38-6-generic #34-Ubuntu SMP Tue Mar 8 14:15:57 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/734189 Title: Wireless card turns off when laptop power cable is unplugged -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs