[mythtv-users] No sound via HDMI on my Yamaha RX-V465 A/V receiver

[Razorblade]

Just for the record:

Adding "FlatPanelProperties" "Scaling = Native" to the Device section in 
xorg.conf disables gpu scaling on X startup.

Bjoern

On 07/15/2009 12:06 PM, Razorblade wrote:
> Thank you for your reply and sorry for my late reply ;-)
>
> I finally managed to get 5.1 surround sound out of my Yamaha via HDMI.
> There's no need of an asound.conf.
>
> The problem was with the NVIDIA driver.
> When using metamodes and the "Force full gpu scaling" setting is
> checked, then there's no sound on my AVR.
> Simply unchecking this "Scaling" item (or disabling metamodes) does the
> trick.
>
> I don't have any idea why this isn't working when using metamodes and
> enabling "gpu scaling".
> I also figured out why I don't have sound when upgrading the kernel in
> MythDora to the latest version - it reverts back alsa to 1.0.17 -
> there's no support for my HDMI ;-)
> So, when someone is about to upgrade the kernel in MythDora: keep in
> mind to compile and install the latest alsa driver. There's no
> difference for my HDMI with alsa 1.0.18a and 1.0.20.
>
> This resolved all my further issues with mythtv: choppy sound with ac3
> when cpuspeed daemon is running, choppy video playback with internal
> player playing iso-files and audio being out of sync when using ac3
> audio in liveTV.
>
> The settings in MythTV are:
>
> General setup:
> Playback device: ALSA:hdmi
> PassThrough device: ALSA:hdmi
> Max audio Channels: Stereo (seems to be some bug in myth?!)
> Both PassThrough items checked
>
> Audio setup:
> Playback device: ALSA:plughw:0,3 (this is for an ASUS M3N78-VM, change
> according to aplay -l)
>
> Thanks
>
> Bjoern
>
> On 07/13/2009 06:23 PM, Allen Edwards wrote:
>> On Mon, Jul 13, 2009 at 7:43 AM, Razorblade<Razorblade at kabelbw.de> wrote:
>>> @ Jason
>>> I did enable the one (and only) iec958 device in alsamixer.
>>> This is the only device/switch in alsamixer.
>>>
>>> @Allen
>>> Sorry if I did not describe this more clearly.
>>> My Setup:
>>>
>>> MythBox - Yamaha - TV --> video but no sound (Yamaha displaying "No
>>> audio
>>> input Signal")
>>> MythBox - TV --> video and sound
>>> Windows(on different hard drive but same box) - Yamaha - TV --> video
>>> and
>>> sound
>>>
>>> My hdmi plug is hw:0,3. I tried entering this in mythtv and I also tried
>>> ALSA:hdmi.
>>>
>>> I do not have an asound.conf.
>>> What do your changes do in this asound.conf?
>>>
>>> Bjoern
>>>
>>
>> I documented what I know at
>> http://www.mythtv.org/wiki?title=AllensDigitalAudioHowto
>>
>> I think you should have some kind of asound.conf file. Read the wiki
>> and see if it helps. There are several options given that might help.
>> The format command reverses the order of the bits I believe.
>> Apparently some decoders require that and some don't.
>>
>> Allen
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>>
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