Bug#609747: udev: snd-powermac.ko not loaded automatically on iBook (first generation), resulting in no audio

[Ben Hutchings <ben@decadent.org.uk>]

On Wed, Jan 12, 2011 at 12:59:46PM -0500, Daniel Kahn Gillmor wrote:
> On 01/12/2011 12:15 PM, Ben Hutchings wrote:
> > No, because the build tree doesn't have the symbol versions in it.
> > What might work is to install both the linux-source-2.6.32 and
> > linux-headers-2.6.32-5-amd64 packages, and then run:
> > 
> >     make -C /usr/src/linux-headers-2.6.32-5-powerpc/ \
> >         M=/usr/src/linux-source-2.6.32/sound/ppc
> 
> Thanks, this was very helpful advice (to be explicit, i needed
> linux-headers-2.6.32-5-powerpc, not linux-headers-2.6.32-5-amd64, and i

Sorry, my fingers automatically typed the flavour I usually use
and test.

> built it as a non-privileged user after unpacking
> /usr/src/linux-source-2.6.32.tar.bz2 into the user's home directory,
> varying the M= argument above to match).
> 
> So as the superuser, i replaced
> /lib/modules/2.6.32-5-powerpc/kernel/sound/ppc/snd-powermac.ko with the
> hand-built snd-powermac.ko, and ran depmod -a.
> 
> i can do:
> 
>  modprobe -v -r snd-powermac
>  modprobe -v snd-powermac
> 
> and my audio still works with the new module.  so that's good!
> 
> But it still doesn't get auto-loaded for me.
>
What does '/sbin/modinfo snd-powermac' say?

Beyond that, I think we'll need a udev log showing what devices
the kernel is reporting to it.

[...]
> So what am i missing?  Is this sufficient info, but now udev needs to do
> something else?  or is there some other patch that needs applying?
> 
> I note that the following snd modules *are* auto-loaded -- i don't know
> if this is useful info or not:
> 
> >> 0 root@clam:~# lsmod | grep snd
> >> snd_aoa_i2sbus         20629  0 
> >> snd_pcm                65033  1 snd_aoa_i2sbus
> >> snd_page_alloc          9045  1 snd_pcm
> >> snd_seq                51409  0 
> >> snd_timer              20956  2 snd_pcm,snd_seq
> >> snd_seq_device          8405  1 snd_seq
> >> snd                    52651  5 snd_aoa_i2sbus,snd_pcm,snd_seq,snd_timer,snd_seq_device
> >> soundcore               8003  1 snd
> >> snd_aoa_soundbus        6669  1 snd_aoa_i2sbus
> >> 0 root@clam:~# 
 
I think alsa-base may load those explicitly.

Ben.

-- 
Ben Hutchings
We get into the habit of living before acquiring the habit of thinking.
                                                              - Albert Camus