Subject: powermac 7500 [was: Re: [linux-audio-user] ppc audio input..]
From: Eric Dantan Rzewnicki (rzewnickie_AT_rfa.org)
Date: Fri Mar 12 2004 - 20:20:24 EET
I should try again to research this myself ... But since a few of you
seem to know something about linux on macs and I haven't found much in
the past regarding my particular hardware when I have looked ...
I have an old PowerMac 7500 upgraded to a maxpowr G3 300MHz cpu
(originally with a 601 100MHz chip). This is a PCI powermac. Do you know
if I can get linux to run on this machine?
The thing's been powered off for almost 2 years ... but, one of my
longstanding todo items is getting it going as a linux box to have as a
backup for web/mail/irc/etc and possibly basic recording duty in case I
totally hose my main audiobox someday.
Any pointers or experiences with this or similar hardware?
Thanks,
Eric Rz.
On Fri, Mar 12, 2004 at 03:04:56PM +0000, Martin Habets wrote:
> >From: dmotd <inaudible_AT_dart.net.au>
> > i'm using the g3 internal soundcard (chip=burgandy) with both the
> > oss-lite and alsa drivers.. neither driver has improved the
> > situation.. for a bit of clarity, no sound is passed through the
> > chip, and capture/recording doesn't work for any of the inputs, in
> > fact in alsa there are no capture devices available at all and an
> > inspection of '/proc/asound/card0/pcm0c/sub0/status' reveals the
> > unfortunate message 'closed'..
>
> It is normal that the status has closed unless you are actually recording.
> My G4 titanium uses the snapper chip, so we use the same kernel driver.
> What do
> you have in /proc/asound/devices? I get:
> 1: : sequencer
> 0: [0- 0]: ctl
> 16: [0- 0]: digital audio playback
> 24: [0- 0]: digital audio capture
> 33: : timer
>
> If you get a similar entry for capture, we should be able to get it going.
> Make sure your "PCM 1" and "Monitor" entries are turned up in your mixer.
> Like Derek I also have a lot of noise problems, but my best results so far
> are with PCM 1 set to 75%-85% and Monitor set to 90%. I'm still puzzled how
> these two relate.
>
> > on the flipside, os9 has no problems with sound input, which leads
> > me to suspect that it has control of an internal setting that linux
> > does not..
>
> Hmm, haven't checked out the Mac OS side yet. Will have to give that a try
> sometime.
>
> > can anyone shed some light, or perhaps tell me who to politely
> > abuse! btw, i tried alsa-user-list but my msg is trapped in the
> > moderation blackhole...
>
> You could try a friendly mail to: linuxppc-dev_AT_lists.linuxppc.org
> I'm using the PPC specific kernels from:
> http://penguinppc.org/dev/kernel.shtml
> so far with the same results you get (the 2.5 tree realy holds the 2.6
> kernel now).
> But any fixes will be in here first.
>
> Martin
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