This bug was described in known issues for 8.10 release.
"Cannot reactivate Intel 3945/4965 wireless if booting with killswitch enabled
On laptops with Intel 3945 or Intel 4965 wireless chipsets and a killswitch for the wireless antenna, starting the system with the killswitch enabled (i.e., with wireless disabled) will prevent re-enabling the wireless by toggling the killswitch. As a workaround, users should boot the system with the killswitch disabled. A future kernel update is expected to address this issue." http://www.ubuntu.com/getubuntu/releasenotes/810
This bug was described in known issues for 8.10 release.
"Cannot reactivate Intel 3945/4965 wireless if booting with killswitch enabled www.ubuntu. com/getubuntu/ releasenotes/ 810
On laptops with Intel 3945 or Intel 4965 wireless chipsets and a killswitch for the wireless antenna, starting the system with the killswitch enabled (i.e., with wireless disabled) will prevent re-enabling the wireless by toggling the killswitch. As a workaround, users should boot the system with the killswitch disabled. A future kernel update is expected to address this issue."
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may be it is time to do something?