To see what driver is in use you can simply open a terminal and type
Code:
glxinfo | grep NVIDIA
it should show you something similar to that
Code:
server glx vendor string: NVIDIA Corporation
client glx vendor string: NVIDIA Corporation
OpenGL vendor string: NVIDIA Corporation
OpenGL version string: 3.3.0 NVIDIA 270.41.06
as output, in the version string you see the driver version.
KDE in 11.4 is 4.6.0.
You can check that by
in the terminal, which shows something like
libkde4-4.6.0-6.15.1.x86_64
For your resolution problem, I think it is somehow related to your monitor, I hope someone else has an idea about this. It is too long ago I used CRTs.
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