I have a new machine with a recent video card (ATI Radeon HD5850) connected to an Acer H233h monitor with a native resolution of 1920x1080 through a KVM (switch keyboard)
At first, as the KVM don't forward the plug&play information from the monitor, it's seen as a 'non-plug&play monitor' and the maximum resolution proposed is 1600x1200.
I have installed the driver of the monitor (H233h.inf) and now the 1920x1080 is available but when I select it, the refresh rate is set to "30Hertz interlaced" and the image on the screen 'tremble' which make it unusable.
I have tried to modify some parameters in the inf file to adjust the horizontal and vertical refresh of the monitor but without success ...
Please note that I have other machines connected through this KVM (a WindowsXP and a Linux machine) and they use 1920x1080@60hz without problem
Note also, that when I connect directly the monitor to the video card (removing the KVM from the loop), Windows automatically recognize the monitor and display 1920x1080@60 without problem (but I need to use this KVM, as I don't have enough place to have an other monitor/keyboard/mouse)
So I'm nearly sure that the problem come from the .inf file.
What can I do to use the maximum resolution of my monitor ?