Roger Larsson wrote:

> Hi all,
>
> All of you that are having this problem. Could you reply to me with:
> a) type of ISA cards (as specific as possible, especially SCSI and
> sound)
>

My machine has a single ISA card which is a SB 64 AWE GOLD. The HDDs are running of
the motherboard controller. I have two hdds on one controller, two cd-roms (1
reader, 1 rewriter) on the other. This test was performed when ripping the Britney
Spears Sometimes single to create a wav file. cdrecord produces some interuption, I
used cdparanoia becausethat seems to be much worse so that you can seethe effects.
This also occurs when I write cd-roms, but I don't want to waste a couple of cds
unless you think it's useful in which case I will.



> b) verify that you do not run SCSI/EIDE in non bus master mode.
>

As far as I am aware they are in Bus master mode. The machine was built by myself
and is less than 1 year old (PII 400 Mhz 128Mb RAM, 256 MbSWAP (128Mb on each of
the two hdds). I did not adjust this setting so I assume that it is using Bus
mastering mode which is normal on all modern machines.


> c) attach a output from vmstat 2 > vmstat.out
>    (play sound, start this command, wait 5 secs, start disk activity,
>     wait 5 secs, stop vmstat with ^C
>

I already had sound playing, started the command, waited 5 secs, started ripping,
continued until ripping finished, waited a couple of secs (I think 5) and then
stopped vmstat. During the ripping there was a horrible "slow motiony slow down" of
the music, like when you hold a tape and physically slow it down as it moves inside
a tape player. Also, it often "cut's out" for several seconds at a time as it did
once or twice here.


>
>     This was checked on Wakkos machine, and it indicated that no bus
>     mastering / DMA was used.
>     Note: my SB16SCSI II does not have DMA enabled by default... and
>           ISA cards can not do bus mastering on their own.)
>

I assume you are refering to the sbs which have a hdd controller onboard? Mine are
on the motherboard separate from the sb64.

If you want any further info, just tell me what you need and you've got it
yesturday.


>
> [I will make a summary]
>
> PS.
>
> I do think that this is related (until proven otherwise)
>
> Check out
>   http://www.gardena.net/benno/linux/audio/
>
> But make sure that you are using Bus Master EIDE / dma transfers since
> it does not handle that yet !
>
> /RogerL
>
> Mike wrote:
> >
> > On Sat, 7 Aug 1999, Wakko Warner wrote:
> >
> > > I'm noticing this one one of my machines.  When writing to a hard drive, the
> > > sound drags.  The machine I'm on has piix4 ide and an isa scsi card.  I'm
> > > playing sounds from the drive on the scsi card (aha1510 I think is the scsi
> > > card).  I tried writing to both an ide and scsi drive, both drag the sound.
> > > Sound card is an SB16 pnp /w ide port (not disablable unfortunately).  I had
> > > a similar problem on an isa ide card playing sounds off of the hard drive
> > > (like 44k 16bit 2ch sound off the drive, sound card was an ess card).  My
> > > home box that this is happneing on is 2.2.7.  The one with the isa ide is no
> > > longer active, but it was running 2.0.36.
> > >
> > I see much the same thing under (extremely) heavy disk load, both on
> > onboard piix4 ide, and on an onboard aic7??? scsi.
> >
> > Things it isn't:
> >   hardware - too many people are seeing the same thing for that
> >   driver specific - it happens on both ide and scsi, and with both sb and
> >                     ess cards
> >   anything blindingly obvious
> >
> > Currently I suspect something evil either in sound_core.c or sound_timer.c
> > or (more likely) something scheduler related, but this is wild guessing.  Any
> > ideas?
> >
> > --
> > Mike <rickettm@ox.compsoc.net>
> >
> > Q:      What's yellow, and equivalent to the Axiom of Choice?
> > A:      Zorn's Lemon.
> >
> > -
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> > Please read the FAQ at http://www.tux.org/lkml/
>
> --
>
> The Internet interprets Windows as damage,
>              and routes around it.
>
> Roger Larsson
> Skellefteċ
> Sweden
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
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--
Jonathan C. Masters                     (jonathan@oxlug.org)
                                        PGP: www.brookes.ac.uk/~95227860/KEY

           "Upon this rock I will build my church,
            and the gates of hell shall not prevail against it".

                 -- Matthew 16, 17-18