Blackout local screen

[Arnt Witteveen]

Actually, I though pcanywhere used an 'inbetween' video driver as we
discussed here some time ago. I know the russian app that is supposed to be
faster than vnc but not free does... So they can, I think, capture whatever
windows delivers as screen output, but not send any through to the vidio
card.

Arnt

> -----Original Message-----
> From: Jonathan Morton [mailto:chromi "at" cyberspace.org]
> Sent: donderdag 1 juni 2000 14:45
> To: Arnt.Witteveen "at" vartec.be
> Subject: Re: Blackout local screen
> 
> 
> >What's really wierd is that I've run pcanywhere and vnc and 
> the same time,
> >turned the screen blanking on in pcanywhere and the vnc 
> screen still worked.
> >I couldn't click on anything in vnc, but it still appeared 
> to blank the
> >screen.
> 
> Sounds like pcAnywhere uses something along the lines of either
> gamma-fading or DPMA-blanking the screen, both of which would 
> disable the
> physical monitor but leave the video memory unaffected.  I don't think
> gamma-fading is available on most PC-based video cards, so 
> DPMA sounds like
> the way to go.
> 
> --------------------------------------------------------------
> from:     Jonathan "Chromatix" Morton
> mail:     chromi "at" cyberspace.org  (not for attachments)
> uni-mail: j.d.morton "at" lancaster.ac.uk
> 
> The key to knowledge is not to rely on people to teach you it.
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