windows 7 - Loss of Resolution using Display Port Adapter -

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i have laptop running windows 7, set connect 2 asus monitors. laptop (lenovo) has 1 vga , 1 display port. when hooking these monitors must use display port vga adapter. both monitors go different kvm switches connect monitors.

monitor a. appears monitor connected through display port adapter shows generic name lcd_vga , has (recommended) resolution max of 1280x1024 monitor b. other monitor shows correct name asus vs238 , real (recommended) resolution of 1920x1080

when switch cables = display port adapter , b = direct vga resolutions switch. = 1920x1080 max , b = 1280x1024 max.

i have tried detect under screen resolution, computer reload, kvm context switches, installing new 1920x1080 driver monitors, , using custom resolution via nvidia control panel. none seem work.

is possible display port breaks device information communications somehow? other hints?

you need disclose kvm switch(es) setup. looks kvm switch(es) did not edid emulation via ddc communication between kvm switch(es) , connected system.

but sure, edid emulation issue.


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