20 Dec
2002
20 Dec
'02
12:01 p.m.
Anthony,
I had some problems with the accelerated NVIDIA driver so I turn it off
when I'm working with Ardour (this is a pain in the backside but it
helps). Also, if you're running the accelerated driver it kicks the
latency timer to 248 for the video card. I shut that (and everything
else) down to 32 and kicked the sound card to 248. My video card is AGP
but maybe setting the sound card timer to 248 could help you as well.
Jan
On Fri, 2002-12-20 at 04:15, Anthony wrote:
Thought I'd post to see if anyone has any advice. I've just built a
new SMP machine: Asus A7M266-D, 1.0 Ghz Athlons * 2. I got some nice
fans from endpcnoise.com (Molex) that are virtually silent and a Power
Supply which is louder than what I'd hope but very reasonable for
400W's I suppose (dunno).
I installed gentoo, latest alsa, etc... Unfortunately playback is
distorted during video load. It is *not* a CPU load issue - I can
playback just fine while compiling the kernel with make -j3. If I
scroll pages up and down in galeon the sounds slows down :o. Jack
doesn't report Xruns but sometimes delays when I do this. This occurs
both with the onboard C-media chip and my Delta 44.
I struggled for a long time to get the IRQ's not to share. I tried all
the suggestions in the Audio Quality HOWTO. The video card is a PCI
GForce 2. It was in my old machine and didn't cause any problems
(while my old onboard AGP did create some noise). The only thing I can
find is the PCI Latency settings are all set to 32. This seems odd I
suppose, so I tried higher settings for the video to give it more
bandwith and other variations with no success.
I might go out and buy an inexpensive AGP card tomorrow, but I'd hate
to find out the problem is deeper than that. Kernel is 2.4.20 vanilla
tried with and without lowlat. Maybe I should back down to 2.4.19? Any
suggestions? TIA
--ant