Try looking to see if you are using the open source generic nvidia driver or the proprietary one. I am not sure where that is in the Kubuntu menus but look for something in System, or Administration with a name that is probably something about Hardware. It should run a program that looks to see if there are proprietary drivers you might choose to use. I AM curious though if you have some particular reason for suspecting it is due to you having that video card since a screen freeze could be something above the driver level. On Thu, Nov 10, 2011 at 3:59 PM, Derek Trotter wrote: > I have an NVIDIA Geforce 8400 GS card that plugs into a PCI slot. I have > no problems with it in XP, but when I installed Kubuntu 11.10 I found a > problem. Occasionally the screen freezes. I can't switch to a console. > Also I can't kill the x server. I know the machine has not completely > locked up because when I have audio playing, it keeps playing even though > the screen has frozen. None of the usual means to shut down a machine > work. The only thing I can do is hit the reset button, press the power > switch for several seconds until the machine shuts off, or pull the plug. > I've encountered this on Ubuntu 11.10, Kubuntu 11.10, Mepis 11 and Fedora > 15. I installed the LTS verson of Kubuntu 10 and haven't had any problems > with it. Does anyone have any idea what's going on or how to fix it? > > Thanks > ------------------------------**--------------------- > PLUG-discuss mailing list - PLUG-discuss@lists.plug.**phoenix.az.us > To subscribe, unsubscribe, or to change your mail settings: > http://lists.PLUG.phoenix.az.**us/mailman/listinfo/plug-**discuss > -- Dazed_75 a.k.a. Larry The spirit of resistance to government is so valuable on certain occasions, that I wish it always to be kept alive. - Thomas Jefferson