[LAU] kernel changes

[Folderol]

On Sun, 10 Feb 2013 14:31:47 -0800
"Len Ovens" <len at ovenwerks.net> wrote:

> 
> On Sun, February 10, 2013 12:52 pm, Folderol wrote:
> > On Sun, 10 Feb 2013 08:14:32 -0800
> > "Len Ovens" <len at ovenwerks.net> wrote:
> >
> >>
> >> On Sun, February 10, 2013 2:57 am, Folderol wrote:
> >>
> >> > One thing I find confusing is the way the kernel performance changes
> >> so
> >> > dramatically from one version to the next.
> >> >
> >> > In debian testing, 64bit V3.1 vanilla works beautifully on my current
> >> > machine, but V3.2 requires jack to be set to 4x the latency! That's
> >> for
> >> > both
> >> > vanilla & RT.
> > I'll connect it up sometime during the week and give this a try. FWIW my
> > soundcard is a venerable 2496

Having been laid low by a cold, I eventually got bored and had a look at this
again.

I'm running only 64bit OSs on a quad core AMD. The MOBO is an Asus one with a
uefi bios. I can't find anything on that bios that is relevant to irq or
tweakable in any way that might benefit sound.

I only have one PCI slot, and the soundcard comes out at irq20 which is below
the usb irqs (interestingly the on-board sound is above usb).
As a side issue I'm wondering if this fact is causing very occasional Xruns
from ALSA - When I say occasional, I mean maybe once or twice in an entire
afternoon session.

Double-checking again. The 3.2 kernel behaviour is appalling, regardless of
whether I use the vanilla one of the RT one, 3.1 is smooth as silk.

-- 
Will J Godfrey
http://www.musically.me.uk
Say you have a poem and I have a tune.
Exchange them and we can both have a poem, a tune, and a song.