[NBLUG/talk] Sound distortion while scrolling/moving windows in X

[Bob Blick]

I got a little mixed up with IRQ and DMA, although you
should change IRQ settings, I think the BIOS setting
is actually for DMA Delayed Request.

Cheers,

Bob

--- Bob Blick <bbblick at sbcglobal.net> wrote:

> Hi Dave,
> 
> It's an interrupt issue and xorg. Messing with some
> additions to xorg.conf settings may make it a little
> better. I forget which ones. You may also get some
> results by changing the IRQ channel of the sound
> chip.
> IRQ controllers quite often have interaction even
> with
> different channels, so although it may appear that
> you
> aren't sharing IRQs, changing the channel may do
> something. You may also mess with the BIOS settings
> for "IRQ delayed request". But the time I had to
> deal
> with it, it was just a bug in xorg that was not
> repairable, affecting certain combinations of
> motherboard and sound chip, and I either had to go
> back to an earlier version of xorg or get another
> sound card, which is what I did.
> 
> Cheerful regards,
> 
> Bob
> 
> --- Dave Sisley <dsisley at sonic.net> wrote:
> 
> > Here's a weird one.  If I scroll in a window while
> > listening to music, 
> > the sound becomes distorted until I stop
> scrolling. 
> > It also happens if 
> > I'm moving a window around on the screen.  The
> > system monitor & top 
> > shows the CPU jumps up when I'm fooling with the
> > windows.  It's usually 
> > X that's at the top of top, but if I'm scrolling
> in
> > Firefox, both X and 
> > FF use up the CPU.
> > 
> > I'm currently running Fedora 8, with Gnome on the
> > desktop.  I tried 
> > logging into X with xfce, but it happens there
> too. 
> > I'm using xmms when 
> > this happens.  I've tried fiddling with various
> xmms
> > and sound card 
> > settings, but nothing seems to help.
> > 
> > It's annoying.  Thanks for any ideas.
> 
> 
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