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.
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.
--
.''`. Martin Loschwitz Debian GNU/Linux developer
: :' : [email protected] [email protected]
`. `'` http://www.madkiss.org/ people.debian.org/~madkiss/
`- Use Debian GNU/Linux 3.0! See http://www.debian.org/
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 <[email protected]>
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).
Still off topic. ALSA bug reports should be filed here:
https://bugtrack.alsa-project.org/alsa-bug/login_page.php
Lee