Mavericks isn't recognizing my monitors - manufacturer or resolution. Why?

Macbook Pro, 10.9.4, 16GB of RAM, two Genuine Apple Thunderbolt to DVI adapters.
I am trading up -- old: two 1600x1200 Samsung Syncmasters new: two Dell U2413's 1920 x 1200.
When I plug in the new monitors, I still only get 1600x1200 resolution and now stretched on these new 16:9 displays.
The Monitors dialog box says "Syncmaster" still, and 1920x1200 is not an available option under scaled resolutions.
Is there an approved way to fix this? I downloaded SwitchResX trial - but it still sees the monitors as "Syncmaster 1" and "Syncmaster 2". It allows 1920x1200 as a display resolution I can select, but in the advanced details for that view, it shows 1600x1200 scaled to fit 1920x1200?
It's really bizarre. I've never seen an Apple OS behave this way with regard to monitors - it's always "just worked instantly"

I am just going to go ahead and answer my own question here.
I forgot to mention: I am using an Adderview Pro Multiscreen Dual-DVI KVM switch -- and that had to be reset to recognize the new displays!
Once I figured that out - booyah! It "just worked"

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Mavericks isn't recognizing my monitors - manufacturer or resolution. Why?

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