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I just hooked up a KVM switcha and now I cannot change the resolution in KDE at all, its stuck and 640x480 (no other optionin control panel) no matter what I put in xorg.conf.
I just hooked up a KVM switcha and now I cannot change the resolution in KDE at all, its stuck and 640x480 (no other optionin control panel) no matter what I put in xorg.conf.
This is a guess, but an educated one. It could be that your KVM switch does not support or emulate DDC (Display Data Channel) which is a communication between your monitor and video card where a resolution is 'agreed'. If the video card cannot detect a monitor it will revert to a safe mode of 640x480.
New one on me--I thought a KVM switch was---well---just a switch--- i.e. something that just moves every wire (signal) from one connector to the other.
Manufacturer of the KVM switch would be the place to go next....
If use that PC without the KVM, are those higher resolutions available? Perhaps there's some problem you are overlooking when you edit your xorg.conf (eg, to use a personal example, like the time I was quitting rather than writing my changes -- d'oh!!!) Second, what is the make and model of your KVM? Also, what video card are you using?
I have read a few websites that stated that some KVM switches will only support a certain resolution, Mine is a no name cheapie and could not find any info on it, but ended up getting 1024x768 by modding xorg.conf (12 times :O ) until I got it, so its good now.
"New one on me--I thought a KVM switch was---well---just a switch--- i.e. something that just moves every wire (signal) from one connector to the other." No! No! and No! That is a bit like me saying "a car is just a car isn't it? 4 wheels and an engine". A cheap KVM will have problems with some O/S, any keyboards and mice that are out of the ordinary, and will provide poor video quality.
"I have read a few websites that stated that some KVM switches will only support a certain resolution" bunkum!!! A quality KVM switch will easily support 1600x1200, some 1900 x 1440. Any that claim a higher resolution are probably quoting the maximum bandwidth of the video silicon but being analogue devices you will never get to that maximim potential.
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No! No! and No! That is a bit like me saying "a car is just a car isn't it? 4 wheels and an engine". A cheap KVM will have problems with some O/S, any keyboards and mice that are out of the ordinary, and will provide poor video quality.
