Comment 10 for bug 1174145

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Dan O'Donovan (dodonovan) wrote :

Uninstalling the Broadcom 'wl' driver worked for me (on a Dell Vostro 3500 with BCM4313 PCI wireless adapter). The open-source brcmsmac driver that gets loaded instead of it doesn't have this problem.

To switch from 'wl' to 'brcmsmac' (on Ubuntu 13.04 anyway), simply:
  sudo apt-get remove bcmwl-kernel-source
(might need to reboot after that, or run 'sudo modprobe brcmsmac', if the new driver doesn't load automatically)