The bug still exists with kernel 3.2.0-24, so I change the status back to confirmed. Blacklisting acer_wmi indeed does the trick. However, as Simos wrote, it's rather a workaround than a solution.
** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/938630 Title: Ubuntu loads acer-wmi on Sony laptop; WiFi not working To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/938630/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs