All the USB-to-VGA (or DVI) adapters I bought 2 years ago only support the resolution up to 1680 x 1050. Diamond, IOGear and SIIG.
I am in search of one of these adapters that would support the 1920 x 1080 configuration. Came to some real disappointments.
Bought an IOGear GUC2020DW6 USB-to-DVI adapter. On the box, it clearly said the device supports the 1920 x 1080 resolution. But it doesn't. All I got was 1680 x 1050 max. Called their technical support line. Came to an argument that the rep insisted I need to update the video device driver on my laptop to the latest version (what does that got to do with the IOGear device???) and it would work. I did as they suggested. Same thing. Resolution only 1680 x 1050. When I questioned HOW to get that 1920 x 1080 resolution to work, they just couldn't answer it but said it was a problem with my video driver. What a bag of hot air.
Bought another make "Aluratek " AUD200F USB-to-DVI adapter. Again, the box clearly labelled that it supports the resolution of 1920 x 1080. It doesn't. The driver disk that they provided is actually the DisplayLink software - which is used by IOGear. I think this is a Chinese firm reversed-engineered the IOGear hardware and sold under their own brand name, and didn't bother to write their own driver software. The problem is the same as IOGear's. Highest resolution 1680 x 1050.
I tried Tritton UV200 USB-to-DVI adapter. $80. This one... to my pleasant surprise, does work. Resolution 1920 x 1080.
I gathered that Diamond BVU195 should also support the 1920 x 1080 resolution. Haven't tried this one. But since I have found one that works, I probably won't.
That's some great info. Thanks
What generates, and pushes the graphics bits to the display?
Would it be possible to use multiple Tritton UV200 USB-to-DVI adapters to extend the laptop desktop across more than one display of a size and resolution you are using; additional to the laptop's?
Does the laptop's graphics 'card' have much effect on the above?
Does the CPU have much effect on the performance of multiple graphics displays?