Messages in this thread | | | Subject | Re: Problems on Apple iBook with ALSA and snd-powermac [2.6.11.5] | From | Benjamin Herrenschmidt <> | Date | Mon, 28 Mar 2005 10:27:43 +1000 |
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On Mon, 2005-03-28 at 01:08 +0200, Martin Loschwitz wrote: > Hi folks, > > given that the alsa-user-mailinglist has some strange kind of authentication > mechanism, and admin-authorization and whatever, I'm writing this mail to the > LKML (it would have been CCed here anyway). > > The current snd-powermac module from ALSA seems to have trouble with modern > Apple iBook computers (and possible other Apple notebooks, but I can't tell > for sure). With 2.6.11.5 and having snd-powermac loaded, playing some sound > results in a very noisy playback; you can only hear that if you turn volume > on the PCM and VOL mixers up to the maximum, and even then, it's very hard > to hear. After removing snd-powermac and loading the "old" pmac-driver, the > sound playback works just fine.
Have you tried disabling DRC Or increasing the DRC range level ?
> I have been able to find out that with 2.6.8 (at least with the version that > Debian ships currently), the problem does not appear; snd-powermac does its > job very nicely there. Given that 2.6.11 included some ALSA changes, I just > compiled 2.6.10 on this box and booted it, and had the same problems I have > with snd-powermac on 2.6.11.5. > > Is this a known problem and is a fix available for it? If not, what can I do > to help with hunting this bug? I really like ALSA and prefer it over the old > pmac-sound-driver. > -- Benjamin Herrenschmidt <benh@kernel.crashing.org>
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