I am running Lucid and replaced my old Samsung monitor with an Acer Flat screen. Now my Skype locks up in conversation. I ran System> Administration>Hardware Drivers and I received this:

No proprietary drivers are in use on this system

I ran Synaptic Package Manager and found these installed files using Nvidia in the Quick search:

nvidia-settings
nvidia-glx-96
nvidia-173-modaliases
nvidia-96
xserver-xorg-video-nouveau
xserver-xorg-video-nv
smartdimmer
jockey-gtk
jockey-common

I think Skype locks up because I am not using the Nvidia chips.What do I need to do and how do I need to do it to have Nvidia drivers power this monitor. Thanks for your anticipated help