[mythtv-users] HDMI audio change

[Preston Crow]

On 03/07/18 16:32, John Pilkington wrote:
> On 07/03/18 20:38, Preston Crow wrote:
>> On 03/07/18 15:28, Jay Harbeston (ISeePeople) wrote:
>>>
>>>>> GeForce GT 710 with GK 708 audio subsystem, video driver 390.25,
>>>>> 4.15.4-200.fc26.x86_64
>>>>>
>>>>> dmesg | grep -i nvidia shows HDMI/DP, pcm=3 and 7, as 
>>>>> cardd0/inputs 7 and 8
>>>>>
>>>>> dmesg | grep -i hda shows a vga switcheroo audio client...
>>>>>
>>>>> HDMI stereo works but defaults to HDMI2 mode and fails on start of 
>>>>> playback
>>>>> of some files.  Usually recovers on setting to plain HDMI
>>>> Has anyone had any success on this problem. I still have no audio via
>>>> HDMI and I do not really know where to go with the troubleshooting.
>>> I was never able to solve this problem when it happened to me.
>>>
>>> When I was using my Zotac with NVIDIA ION and it happened, I had to 
>>> reload the OS on the front end. There is something goofy with NVIDIA 
>>> drivers in my opinion.
>>>
>>> I stopped using the Zotac as it bit me a couple of times and I 
>>> switched to using an AMD/ATI processor using the open source amdgpu 
>>> driver using VDPAU within mythtv.
>>>
>> I'm running on an Ion motherboard, and I just recently switched to 
>> HDMI audio, and have had no problems with it yet.  I'm running with 
>> the Nouveau drivers, which are working great for me.  I was very 
>> frustrated with it not working initially until I realized I had to 
>> unmute the output.  My only issue now is that I can't do H.265 
>> high-res video at full speed, but I have very few of those files.
>
> Usually my NVidia HDMI audio works ok now, but it still boots in HDMI2 
> audio mode which fails on starting playback of some possibly malformed 
> files.
>
> I discovered that the change in my intel HDA audio came from a BIOS 
> update needed to boot kernel 4.14.5.  I changed that setting and am 
> now told that I have simultaneous audio output on both systems,  but 
> the HDA still doesn't work.  I see occasional popups telling me about 
> spontaneous reconfigurations...
>
> I don't remember seeing which NVidia driver you have. Maybe revert?
For the record, I'm running 4.9.65.  This is getting a bit off topic, 
but I'm concerned to hear of needing a BIOS update for a kernel update.  
Do you have any details on why an update was required?  Was this also an 
Ion motherboard?