I finally managed to solve the problem on my system, a Lenovo T410, with Nvidia NVS 3100M graphics card and Ubuntu Natty 64 bits.
From the BIOS configuration, I selected as graphic device "Discrete Graphics". Specifically, I could choose among three options: "Integrated Graphics", "Discrete Graphics" and "NVidia Optimus". The default value was "NVidia Optimus". I also disabled the automatic OS detection. For more information refer to http://www-307.ibm.com/pc/support/site.wss/MIGR-76476.html
I finally managed to solve the problem on my system, a Lenovo T410, with Nvidia NVS 3100M graphics card and Ubuntu Natty 64 bits. www-307. ibm.com/ pc/support/ site.wss/ MIGR-76476. html
From the BIOS configuration, I selected as graphic device "Discrete Graphics". Specifically, I could choose among three options: "Integrated Graphics", "Discrete Graphics" and "NVidia Optimus". The default value was "NVidia Optimus". I also disabled the automatic OS detection. For more information refer to http://