T520 + Nvidia NVS 4200m + Installed Ubuntu 11.04

[nap1]

Hello,

I have a Lenovo Thinkpad T520 laptop with Nvidia NVS 4200m Graphics card. I installed Ubuntu 11.04.

Before I installed Ubuntu 11.04 I had went to my bios and disabled Nvidia Optiums and changed the graphics to Discrete Graphics. Then inserted my Ubuntu 11.04 CD and installed.

With this I had gotten unity to work. However when I pull the power cable from the laptop my screen freezes. Also if press "FN"+ Home or END to change the brightness of the screen my screen freezes and no longer able to move the mouse or press anything on keyboard.

Did anyone ever run into this problem and or fix this issue? Can you please guide me so I can get the graphics working properly with Ubuntu 11.04 with Unity with a Nvidia NVS 4200m graphics card.

Thank You in Advance for your help.

[pelonbiologo]

Hi Nap1,

I have a lenovo Thinkpad t420 with the same video card NVS 4200m. I too enabled only discrete graphics from the BIOS and I am having the same issues.

Not only does the dimming of the screen not work but I have also noticed that neither the Display port or the VGA out work with fn + F7. Any ideas on how to fix this???:confused:


Cheers,
P

[steve11911]

There is,they say, a fix:

http://www.thinkwiki.org/wiki/Category:T510

Also here:

https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers/+bug/562005

Let us know...