Neomagic 256AV sound not working.

Frank Mayhar frank at
Sun Sep 19 22:04:13 PDT 2004

Well, I finally got my laptop all the way to 5.3-BETA4, all the ports rebuilt
(which was a chore with this old PII 400) and was ready to rock.  Or so I
thought.  It turns out that the Neomagic sound driver in 5.3 doesn't like the
Dell Inspiron 3500's version of the Neomagic 256AV.  Bear in mind that this
had been working just fine in 4-stable for years.

I managed to build a version of the driver with the appropriate messages turned
on and its response is:

pcm0: this is a non-ac97 NM256AV, not attaching

The relevant bit of the dmesg is

found-> vendor=0x10c8, dev=0x8005, revid=0x20
        bus=1, slot=0, func=1
        class=04-01-00, hdrtype=0x00, mfdev=1
        cmdreg=0x0202, statreg=0x0290, cachelnsz=0 (dwords)
        lattimer=0x00 (0 ns), mingnt=0x00 (0 ns), maxlat=0x00 (0 ns)
        intpin=b, irq=11
        powerspec 1  supports D0 D3  current D0

and pciconf -l -v says

none1 at pci1:0:1: class=0x040100 card=0x008f1028 chip=0x800510c8 rev=0x20 hdr=0x00
    vendor   = 'Neomagic Corporation'
    device   = 'NM2200 MagicMedia 256AV Audio Device'
    class    = multimedia
    subclass = audio

Nothing has changed since 4-stable, but the new driver certainly doesn't
like this device.

When I have time I'll try to see what is different between the -stable
driver and the 5.3 driver, but that may not be until next weekend...

If there's any other information I can provide before then, please let me
Frank Mayhar frank at
Exit Consulting       

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