Re: [gentoo-user] Re: Problem with xf86-video-ati & nvidia-drivers

[Volker Armin Hemmann <volkerarmin@googlemail.com>]

On Sunday 17 July 2011 09:54:33 Grant wrote:
> >>>> I gave it a try but there was no change.  I tried plugging the TV
> >>>> and
> >>>> computer into a power strip and also into an isolation
> >>>> transformer.
> >>>> Any other ideas?
> >>> 
> >>> I still think it's a driver problem.  Again: it's *physically*
> >>> impossible to
> >>> have these problems with the HDMI signal.  At most you get "digital
> >>> noise",
> >>> which means some pixels get stuck or are missing.  But not what you
> >>> get; that's just something that can't be explained.
> >> 
> >> I was thinking about this.  The digital HDMI signal must be converted
> >> into an analog signal at some point if it's being represented as light
> >> on a TV screen.  Electrical interference generated by the computer and
> >> traveling up the HDMI wire should have its chance to affect things
> >> (i.e. create weird shadows) at that point, right?
> > 
> > Not with DFPs.  Those work digital even internally.  I assume of course
> > that his HDMI TV *is* a DFP.
> 
> But at some point the 1s and 0s must be converted to some sort of an
> analog signal if only right behind the diode.  A diode must be
> presented with a signal in some sort of analog form in order to
> illuminate, right?

no.

If your tv is a standard flat panel, the sub pixels only go from on to off and 
back. Nothing else. There is no analog signal, no transformation nothing. And 
off means 'let light through' and on 'black'

If you have an led display it is pretty much the same. All the levels you see 
are achieved with fast switching. There are no analog levels.

Stroller is probably correct with overscan/underscan.

But that has nothing to do with digital/analog conversion.


> Digital is just a figment of our imagination after
> all.

emm, no, seriously not.

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