Video-out support

Harald Welte laforge at
Tue Aug 26 19:41:29 CEST 2008

On Tue, Aug 26, 2008 at 02:46:23PM +0200, Francesco Cat wrote:
> Isn't USB 2.0 required for USB-to-VGA adapters?

yes, USB2 is required for all USB-to-VGA adapters that I have ever seen as a
mass product.  The reason is very simple: A full-screen uncompressed video has
much more bandwidth than USB1 can sustain.

I've only ever once seen a pre-mass-production prototype of a USB1-to-VGA
adaptor. And that was in fact an entire PXA27x based linux system with
something like VNC.  Just no configuration or user i/o of any sorts.  But even
that never made it mass-market.
- Harald Welte <laforge at>         
Software for the world's first truly open Free Software mobile phone

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