KVM switch resolution problem

[jsanthara]

I have 3 computers hooked up to a 4-port KVM switch and I am having a problem with the resolution on one of my computers. Whenever I switch to another computer and come back, the resolution goes from 1440 x 900 (where I set it) to 1024 x 768 (which looks disgusting on my monitor). The other two computers stay at whatever resolution I set them to, but the one computer just keeps going back to 1024 x 768. I have had the KVM switch for almost two months now and I have not had this problem before. The computer that is having the problem is a new build, but I have had it for about a week and it only starting exhibiting this problem today. I frequently switch back and forth between computers, and 1024 x 768 looks terrible. Does anyone know how I could fix this? The only thing I can think of is that one is 64 bit and the other two are 32 bit, but I still have no idea how to fix the problem. I would appreciate any help you could provide.

Additional details:

Computer 1: Windows 7 x64, Intel Core i5-2500k, Resolution 1440 x 900 (This is the problem computer)
Computer 2: Windows 7 x86, Intel Celeron 430, Resolution 1280 x 1024
Computer 3: Windows 7 x86, Intel Core 2 Duo E4300, Resolution 1440 x 900

Computer 1 uses the on-die graphics from the 2500-k and computers 2 and 3 use the integrated video from the motherboard.

 

[soest009]

What is the type of KVM switch you are using?
Is it a electronic switch or an oldschool switch (with a big knob on it to switch computers / screens)
When electronic, does it emulate a monitor (some switches dnt, each time you switch the system redetects a connecting monitor going to default settings)

 

[jsanthara]

I am using an active (electronic) switch. As to your last question regarding emulation, I am not sure. Whenever I switch between computers white text appears on the screen that reads "Auto-Detect (Analog Input)". Also it doesn't matter if I switch to a port that is connected to a computer or not; if I switch away, when I come back the resolution is at 1024 x 768.

The device in question is the Linkskey LKU-S04ASK.

 

[soest009]

Ok, looks like the switch is emulating but still the monitor autodetect kicks in seeing a standard monitor size and switches back to "basic" resolution.
I found a thread on superuser on how to disable the autodetect function in windows.
This might help avoiding the driver to switch back to that "basic" resolution.

http://superuser.com/questions/120983/how-to-disable-monitor-auto-detection-in-windows-7

 

[jsanthara]

I tried disabling TMM in the registry (set value data from 1 to 0 on (UselViewHelper) under the "Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\TMM" key), but it didn't work. I believe that is for multi-monitor anyway. I searched for the "DMMEnableDDCPolling" key in the registry but the search came up empty. Do you know of any other ways to disable the autodetect?

 

[soest009]

Not from the head, i have to search for that one also then.