xrandr not really changing resolution

[Tony Houghton]

I've noticed that if I change resolution with xrandr the physical output
appears to stay at the original resolution and the graphics card scales
up the smaller resolution. Is this a quirk of NVidia's proprietary
driver or a standard xrandr feature? Is there a way to force it to
change the physical output, perhaps using VidModeExtension instead of
xrandr? I want to be able to select a refresh rate as well as the
resolution.

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TH * http://www.realh.co.uk