[vox-tech] Skipping sound

[Samuel Merritt]

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Running twm, mpg123 in an xterm, and Mozilla with X niced to 0, the
sound still skips when I scroll in Mozilla.

The skipping even happens with "play" (wave file player), and this
machine is grossly overpowered for just playing music and running X, so
I doubt it's a CPU time issue.=20

I'm actually running Mandrake 9.0 on the machine in question, and X
started out niced to -10.=20

Also, I forgot to mention earlier that I've ruled out an IRQ conflict.
Theoretically, since they're both PCI devices, the sound and video cards
should be able to share an IRQ, but I moved the video card around to
ensure that they're on different IRQs.=20

On Wed, Feb 26, 2003 at 12:38:13PM -0800, Peter Jay Salzman wrote:
> sam,
>=20
> have you tried with a different window manager?   do you get the
> skipping around when you use mp3blaster/mpg123 under twm?   that might be=
 a
> good litmus test.
>=20
> also, you run debian, right?  see if the "X" process is un-niced.
> debian now asks you if you want to run X with a higher priority.
>=20
> try to renice X to 0.  see if that helps the skipping around.
>=20
> pete
>=20
>=20
> begin Samuel Merritt <spam@andcheese.org>=20
> > If I have music playing and I move a window around, switch windows, or
> > scroll a window, the music stutters. I'm using XFree86 4.2.1 and ALSA
> > 0.9.0rc2 (defaults for Mandrake 9).=20
> >=20
> > This happens in any video mode I try, from 1024x768, 24bpp down to
> > 640x480, 8bpp, though the stuttering is worse in higher resolutions and
> > color depths.
> >=20
> > I've also tried switching between ALSA and OSS. It makes no difference.=
=20
> >=20
> > The video card is a Matrox Mystique with 4MB video RAM (MGA 1064SG).=20
> > The sound card is an onboard CM8738.=20
> >=20
> > I'd heard about problems like this years ago, having to do with the
> > video card drivers hogging the PCI bus for long periods of time. I
> > played with the option "PciRetry", found in the mga(4) man page. The
> > stuttering is the same whether this option is on or off.=20
> >=20
> > Google doesn't come up with any relevant results; I did find a whole
> > bunch of pages about a setting that goes in system.ini, but I don't have
> > one of those. =3D)
> >=20
> >=20
> > --=20
> > Samuel Merritt
> > OpenPGP key is at http://meat.andcheese.org/~spam/spam_at_andcheese_dot=
_org.asc
> > Information about PGP can be found at http://www.mindspring.com/~aegree=
ne/pgp/
>=20
>=20
>=20
> --=20
> First they ignore you, then they laugh at you, then they fight you,
> then you win. -- Gandhi, being prophetic about Linux.
>=20
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--=20
Samuel Merritt
OpenPGP key is at http://meat.andcheese.org/~spam/spam_at_andcheese_dot_org=
.asc
Information about PGP can be found at http://www.mindspring.com/~aegreene/p=
gp/

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