[herod98]

Hi Guys,

I'm hope this is a suitable forum to ask my question given we are dealing with ATV hardware.

I've managed to get Ubuntu 9.10 on to the ATV following a hybrid version of the various guides available.

http://wiki.eple.us/appletv_ubuntu_9.10_xbmc

http://wiki.xbmc.org/index.php?title=HOW...he_AppleTV

The main issue I have hit is surprisingly sound! (I was expecting video/crystalhd etc).

I've not been able to get audio over hdmi, and the audio I got with SPDIF only works with stereo input. Such that, if I state within xbmc that my amp supports dolby digital, movies with AC3 soundtracks will have no sound. If I state the amp does not support dolby digital, I do get sound (albeit stereo).

I did a little research on the net, and I had heard of people running in to issues due to pulseaudio. This does NOT seem to be the case with my installation, as pulseaudio is not even installed.

Thinking the stereo (but no AC3) issue could be due to the version of ALSA :-

cat /proc/asound/version
Advanced Linux Sound Architecture Driver Version 1.0.20.

I decided to upgrade using the information from the following post :-
http://ubuntuforums.org/showthread.php?p...ost6589810

Unfortunately after the upgrade, I got NO sound at all (no stereo/no ac3).

With regards to audio over HDMI, there are various topics on this forum and others with no real resolution. I believe the Nvidia driver may disable the audio component over HDMI.

The wiki post here talks about loading the 190 nvidia driver using envyng, but I never was able to see this, the max i could get was the 185 driver.
http://wiki.eple.us/appletv_ubuntu_9.10_xbmc

I'm not sure if the 190 driver fixed audio over hdmi?

Anyway, I guess I'm wondering if anyone has gotten AC3/dolbydigital audio working with ubuntu 9.10 on their ATV (be it via spdif/or hdmi)?

If so, could you please let me know how!

cheers!

[davilla]

"get audio over hdmi" using Ubuntu 9.10, LOL. Not going to happen. It's been stated over and over, to get audio over hdmi, you need a specific version of the nvidia video driver. Ubuntu 8.04 is the last version that this driver will compile under.

You can thank Linux kernel gods for this mess, they caused it by changing the Linux kernel API in an attempt to force the issue on closed binary blobs. This of course did nothing about that issue and only made a fine user mess.

[dan1son]

SPDIF should work if you

Dirt simple, edit "/etc/modprobe.d/options" and add

options snd-hda-intel model=imac24

That's it, remember to run "alsamixer" and un-mute for analog and digital audio output. The iMac with 24 inch LCD has very similar ALC885 ALSA configuration and we can use it for the AppleTV.

from the atv-bootloader site.

Then use IEC958 as the output in XBMC (that's also what you're unmuting).

I haven't tried that in a while since the receiver my ATV is plugged into is stereo only, but that used to work fine.