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

[Bob Blick]

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.