I am also affected by this issue. I use a Thinkpad T400 Model 6474-19G. I updated from Natty 64Bit (Fn+F12 worked) to Oneiric 64Bit and since the update Fn+F12 no longer works.
I am also affected by this issue. I use a Thinkpad T400 Model 6474-19G. I updated from Natty 64Bit (Fn+F12 worked) to Oneiric 64Bit and since the update Fn+F12 no longer works.