Re: libata, Sound on same IRQ : flaky sound

[Robert M. Stockmann]

On Wed, 27 Aug 2008, Jeff Garzik wrote:

> Date: Wed, 27 Aug 2008 20:59:35 -0400
> From: Jeff Garzik <jeff@xxxxxxxxxx>
> To: Robert M. Stockmann <stock@xxxxxxxxxxx>
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Subject: Re: libata, Sound on same IRQ : flaky sound
> 
> Robert M. Stockmann wrote:
> > Hi,
> > 
> > I have a couple of AMD64 machines with onboard sound devices running 
> > and they all have one thing in common : flaky sound when one is 
> > doing some heavy disk I/O on the SATA disks. Interesting enough 
> > /proc/interrupts shows that libata is using the same IRQ as the sound 
> > devices :
> > 
> > model name      : AMD Athlon(tm) 64 X2 Dual Core Processor 6000+
> > stepping        : 3
> > cpu MHz         : 3014.679
> > cache size      : 1024 KB
> > 
> > # cat /proc/interrupts 
> >            CPU0       CPU1       
> >   0:      55869  154467838    IO-APIC-edge  timer
> >   8:          0          0    IO-APIC-edge  rtc
> >   9:          0          0   IO-APIC-level  acpi
> >  16:       1453     499686   IO-APIC-level  libata, NVidia CK8S
> >  17:          0          0   IO-APIC-level  ehci_hcd:usb1
> >  18:      27633   69978987   IO-APIC-level  eth0
> > NMI:      10718      12112 
> > LOC:  154533874  154533852 
> > ERR:          0
> > MIS:          0
> 
> What is the behavior of a recent kernel?
> 
> Is your SATA interface set to legacy mode in BIOS?
> 

the BIOS supports raid0, but the sata disks are running standalone
as /dev/sda /dev/sdb etc.

installing a recent kernel is not that easy, as the required
upgrade of udev will break the initscripts and a lot of installed
services and even the functionality of the KDE desktop. Installing
a recent distro is not desirable as they resemble me only
of a Open Source Vista distro, where it takes months to clean
up the unwanted garbage and bloat inside. Its preposterous that
a upgrade to a recent kernel mandates the installation of a recent
distro. I run Mandrake 10.1 with kernel 2.6.15 and some applications
upgraded like firefox, mplayer and k3b etc.

Robert
-- 
Robert M. Stockmann - RHCE
Network Engineer - UNIX/Linux Specialist
crashrecovery.org  stock@xxxxxxxxxxx

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