I have problem with my Sony Vaio Z VPCZ1. It has physical selector of GPUs which Linux kernel does not detect.
So after GRUB I see black display (I tried different distributions of Ubuntu and other Linux OS). I read in Ubuntu 10.10 was solve same problem with hybrid graphics but not in my case
I found solutions (not easy at do) for oldest models.
PS. for more information I found different webs: https://docs.google.com/document/edit?id=1DxDty2YGNJwq_I8zmVZxDMMXBP6g4HjaDjLfVfTs034&hl=en&pli=1
Update (2011.04.30): I tried update to Ubuntu 11.04 on my VPCZ11C5E and all work (without any patch) fine less Intel GPU (only works Nvidia).