[mythtv-users] HDMI audio change

Peter Carlsson maillist.peter at home.se
Tue Mar 13 21:29:36 UTC 2018


On Wed, Mar 07, 2018 at 11:02:12PM +0100, Peter Carlsson wrote:
> On Wed, Mar 07, 2018 at 09:32:38PM +0000, 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?
> 
> I have tried with both 4.9.0 and 4.14.0 of the Linux kernel in
> combination with Nvidia Proprietary Driver 340.104 and 340.106.

Just for information I upgraded to Debian Stretch 9.4 yesterday and
I got the sound back. I used the setup guide to configure the sound.

Best regards,
Peter Carlsson


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