I'm typing this on a T510 - it definitely has an optimus chipset. Linux support for Optimus is extremely poor, so fortunately you can set in the BIOS whether to use the integrated intel graphics chipset or the discrete nVidia chipset.
The laptop works very well in Ubuntu, which is my primary OS. There definitely were some setup hassles when I got the laptop a year ago, but I believe the support is more streamlined today.
The laptop works very well in Ubuntu, which is my primary OS. There definitely were some setup hassles when I got the laptop a year ago, but I believe the support is more streamlined today.