Re: iMac static
I may be way off here (I haven't been following the thread) but I
had an annoying buzz with my iMac DVD 500 sound a couple of years
ago and I'm pretty sure I got rid of it by muting all the sound
channels except the speaker and master volume.
If that fails, installing alsa is not too difficult.
Just install alsa-base, alsa-source, alsa-utils, alsa-conf
then go find the source in /usr/src and unpack it. It will go into
the /usr/src/modules directory: /usr/src/modules/alsa-driver/
then, assuming you have the kernel source installed, change to that
directory and type 'make-kpkg modules' and it should build you the
alsa drivers. When you install the source, it will ask you if you
need pnp and which driver you want. Say no to pnp and select the
powermac driver only.
once the deb package is installed, dpkg -i *.deb and see if the
modules have loaded with 'lsmod'
You probably get the gist. If not, drop me a note and I'll try to
go into more methodical detail.
Joss
On Thu, Jun 26, 2003 at 05:30:04PM +0100, North London John wrote:
>
> On Thursday, June 19, 2003, at 07:45 AM, cevans@fallen.eml.cc wrote:
>
> >The main problem with the iMac static is that if it has been reported
> >it's not easy to find. (Try doing a search for imac and static...)
> >
>
> Quite true. The few references I've found have been on Yellow Dog and
> Mandrake mailing lists, and none of them are particularly enlightening.
>
> >My observations are that sound worked under the old kernel but
> >apparently
> >broke when the sound area was redone. I've found some suggestion that
> >it's a byte order problem.
>
> What kernel number? I've just tried both Mandrake 8.2 and Yellow Dog
> 2.3 with 2.2.x kernels. The former had no sound at all, the latter the
> same whining static.
>
> <snip>
>
> >. I got the impression at one point that if I could get
> >dmasound_pmac to stay at 8 bit the problem would go away.
> >
>
> I think I tried that, months ago when I first installed Mdk 8.2 ppc -
> didn't work. Can't remember the details now.
>
> >The short of it is, to try alsa, I need an up to date, ppc specific
> >howto. (I'm running silent since the hisses echoing my cursor movements
> >is worrying the technician in me.)
>
> I think alsa could be the answer - but I too need a howto.
>
> >
> >What I do know (this is based on my slot loading DVD iMac but may have
> >wider application):
> > Sound once worked, now it half works.
> > This is a known problem.
> > Many suggestions have been made by people who don't have to do it,
> >many
> > have been based on encouraging newbies to hack drivers.
> > i2c, while needed on some is not loaded or needed on this model.
> > soundcore and dmasound are ok, but silent. dmasound_pmac completes
> >the
> > trio and brings the hiss/
> > The aleged KDE problem appears to be based on DMA/ALSA compatability
> > issues and the fact that most sound packages, including arts have
> > multiple versions and dependencies that can leave fragments of other
> > systems installed. (I don't know too much about this dependency issue
> > since I'm hardly a Linux guru, but I do think that arts was having
> > issues from what I saw while doing multipe installs and reconfiguring
> > everything. I've also read that in the end, arts doesn't like DMA
> > sound.
> >
>
> I tried Mandrake 9.1 ppc without KDE and still got the hiss. There was
> a post on osnews.com ages ago, from someone saying he'd been told it
> was a KDE problem, but that it definitely wasn't. I think he said alsa
> was the answer. (Annoyingly, I've lost the url.)
>
> John
>
>
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