I marked it confirmed because Yiyo confirmed the bug and I also can confirm the bug. the workaround:
rfkill unblock wlano sudo service network-manager restart
does indeed fix the issue.
In my case, I have a Sony Vaio VGN-FW275J This was not an upgrade, but a fresh install (I preferr fresh installs)
05:00.0 Network controller: Intel Corporation WiFi Link 5100
3.2.0-37-generic-pae Ubuntu 12.04.1 i386
I marked it confirmed because Yiyo confirmed the bug and I also can confirm the bug.
the workaround:
rfkill unblock wlano
sudo service network-manager restart
does indeed fix the issue.
In my case, I have a Sony Vaio VGN-FW275J
This was not an upgrade, but a fresh install (I preferr fresh installs)
05:00.0 Network controller: Intel Corporation WiFi Link 5100
3.2.0-37- generic- pae Ubuntu 12.04.1 i386