[mythtv-users] HDMI audio change

[John Pilkington]

On 07/03/18 21:40, Preston Crow wrote:
> 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?

It seemed to be limited to my old HP motherboard.

https://bugzilla.redhat.com/show_bug.cgi?id=1520265