[Bug 1296373] Re: [PATCH] Fix sound on PowerPC

[Adam Smith]

@IsraelDahl
This hw-detect bug can be overcome by just removing the blacklist file

sudo rm /etc/modprobe.d/blacklist.local.conf

Reboot.

Some users will also have to add snd-aoa-i2sbus to /etc/modules (this is
like modprobing the module on startup) AND also remove the snd-powermac
line.

If you still have no sound (or more precisely alsamixer doesn't load)
then it is likely you are suffering from bug 1066435 . The only way to
overcome this is to patch and re-compile the snd-aoa modules.

To get your device-id:

On a working install (e.g. 12.04) open alsamixer (type alsamixer from a
terminal), hit F2, select /proc/asound/cards. Mine is listed as

PowerMac Snapper (Dev 38) Sub-frame 0

38 is the device id.

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https://bugs.launchpad.net/bugs/1296373

Title:
  [PATCH] Fix sound on PowerPC

Status in “hw-detect” package in Ubuntu:
  Confirmed

Bug description:
  This patch is one of several needed to fix sound on PowerPC.  The
  wrong modules are loaded/blacklisted on many machines, causing sound
  not to work or worse the fatal "Fixing recursive fault rebooted is
  needed!" bug -
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1066435

  The attached patch incorporates the suggestions in this debian bug
  report https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=650588 , and
  additionally splits off the 'i2s-a' machines which nolonger use
  snd_powermac (at least that is what I understand from this linuxppc-
  dev message -
  http://comments.gmane.org/gmane.linux.ports.ppc.embedded/51204 ).

  It would be excellent if this could make it into Trusty.  I'm going to
  submit another bug on the casper package.

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