Lost Unity 3D

[Jim Byrnes]

Gave my daughter a Thinkpad Edge a while ago. It had been running Unity 
3D. Today she tried to run VBox and got an error about graphics and it 
was suggested she reboot.  After doing so she noticed the launcher icons 
were large and figured out she was in Unity 2D.

Graphics is ATI Mobility Radeon HD 4225/4250.

She remembers responding to a Software Update in the last couple of days 
but is unsure whether or not she has rebooted until today.

Googling suggests that she may have upgraded to a version that no longer 
supports that chipset.  The suggested fix is to use an earlier kernel 
but I tried that and still no unity 3D.

I will have access to the machine for a while so I wonder if anyone has 
any ideas of how to get Unity 3D back?

Thanks,  Jim