B00tDisk wrote:
USB video dongles of this kind are horribly slow on full-speed USB2 connections.
I can't imagine they'll be worth a flip on the Amiga, driver or no.
You know how people freak out about "oooh nooo it doesn't refresh fast enough!" regarding Amiga emulators on the PC? Yeah, this'll give them something genuine to complain about.
We're not talking about USB 1.1 full-speed. We're talking about USB 2.0 Highspeed. The Deneb is able to achieve a data rate of more than 8 MB/sec. This is surely slower by a few factors than a real Zorro III card, but still could at least be twice as fast as a Zorro II gfx board.
However, given that these adapters are normally employed on fast PCs, they usually use some kind of lossless compression on the data before sending it over the bus. If this is the case and cannot be turned off, it would really slow down the gfx update considerably.
Anyway, only a few of these adapters have been announced with Linux drivers and reverse engineering on that kind of device could be a bit arkward.
Just today, I found a better one with bith digital DVI and VGA output for 70 EUR (
http://www.pearl.de/a-PX3103-1419.shtml ), but I still consider this too much for just experimenting with it (donation anyone?

)
With "current" Amiga graphic boards having problems outputting native resolutions like 1280x1024 and higher, and no-one coping with DVI or HDMI output, an USB graphics adapter might be a solution. It wouldn't be very fast, but it would provide the resolutions (up to 1680x1050 in 24 bit).
Just my two cents.