Subject: Re: [linux-audio-dev] video interference
From: David Olofson (audiality_AT_swipnet.se)
Date: la loka 16 1999 - 00:17:06 EDT
On Sat, 16 Oct 1999, Paul Barton-Davis wrote:
> as an inadvertent test, i just picked up the new version of alsaplayer
> (a truly cool program!). despite having a dual PII-450, with my
> current video card and X server, it suffers from *exactly* the same problems
> as "hdr". huge amounts of noise whenever any X activity occurs; none
> if we just change X state so that no windows are mapped, all noise
> goes away.
>
> it occured to me that this old card only has 1MB of RAM on it. i
> conclude, for now, that its a poor video card, inadequate video RAM or
> something related. whenever i get the matrox back, i'll let you know.
As it most likely doesn't do busmaster DMA, it could be the X server
doing nasty things. What X server? Not too long ago, there were
still hard STIs/CLIs in there... (Some RTLinux people had problems
with that, as it ruins the RT timing, and can't be prevented at run
time.) You could try the standard VGA (*urgh!*) server just to see
if it makes a differece.
//David
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