Re: Asynchronous Video Console für Linux?

From: Alan Cox (alan@lxorguk.ukuu.org.uk)
Date: Fri Dec 21 2001 - 19:21:32 EST


> > are there exist any projects for connecting video consoles to the Linux
> > kernel asynchronous? We would like to write a Linux video console for a
> > (comparatively) slow device which is able to run simple console
> > applications upto the fbdev X-server.
> >
> > Please cc your answer to me.
>
> I do not know about any such project and yes it would be nice.
>
> Its bad to see find / limited by vesafb speed...

There is no fundamental reason you cannot do this. For the kernel side the
console driver in text mode already gives you the 80x25 + attributes image
that you can use to do asynchronous video updates however your hardware
works.

XFree86 4.x has a shadowfb driver layer which does precisely what you need
for an asynchronous server engine. In fact for a real life example of
XFree86 driving "asynchronous" hardware look at the XFree86 VNC drivers.
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This archive was generated by hypermail 2b29 : Sun Dec 23 2001 - 21:00:26 EST