Re: Issue report: HDMI audio problem with kernel 5.6.6-300 and Nvidia

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On Wed, 29 Apr 2020 05:35:27 +0200,
Naoaki Ueda wrote:
> 
> Hi,
> Thank you for developing the awesome products.
> 
> I notice my machine doesn't output any sounds from the HDMI port with
> kernel-5.6.6-300 and Nvidia.
> I have tried booting my machine with kernel-5.3.7-301.fc31.x86_64, it
> works fine.
> So I'm reporting those here referring
> https://bugzilla.redhat.com/show_bug.cgi?id=1784839.
> 
> Following are the part of the outputs from `lspci -v -k` on my machine:
> 
> ```
> 05:00.0 VGA compatible controller: NVIDIA Corporation GP106 [GeForce
> GTX 1060 3GB] (rev a1) (prog-if 00 [VGA controller])
>         Subsystem: NVIDIA Corporation Device 11c2
>         Physical Slot: 2
>         Flags: bus master, fast devsel, latency 0, IRQ 47
>         Memory at ee000000 (32-bit, non-prefetchable) [size=16M]
>         Memory at d0000000 (64-bit, prefetchable) [size=256M]
>         Memory at e0000000 (64-bit, prefetchable) [size=32M]
>         I/O ports at c000 [size=128]
>         Expansion ROM at 000c0000 [disabled] [size=128K]
>         Capabilities: [60] Power Management version 3
>         Capabilities: [68] MSI: Enable+ Count=1/1 Maskable- 64bit+
>         Capabilities: [78] Express Legacy Endpoint, MSI 00
>         Capabilities: [100] Virtual Channel
>         Capabilities: [250] Latency Tolerance Reporting
>         Capabilities: [128] Power Budgeting <?>
>         Capabilities: [420] Advanced Error Reporting
>         Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1
> Len=024 <?>
>         Capabilities: [900] Secondary PCI Express
>         Kernel driver in use: nouveau
>         Kernel modules: nouveau
> 
> 05:00.1 Audio device: NVIDIA Corporation GP106 High Definition Audio
> Controller (rev a1)
>         Subsystem: NVIDIA Corporation Device 11c2
>         Physical Slot: 2
>         Flags: bus master, fast devsel, latency 0, IRQ 50
>         Memory at ef080000 (32-bit, non-prefetchable) [size=16K]
>         Capabilities: [60] Power Management version 3
>         Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+
>         Capabilities: [78] Express Endpoint, MSI 00
>         Capabilities: [100] Advanced Error Reporting
>         Kernel driver in use: snd_hda_intel
>         Kernel modules: snd_hda_intel
> ```

It's a known regression in nouveau driver side, and the fix was
already submitted to drm nouveau upstream:
  https://lore.kernel.org/r/20200416075428.25521-1-tiwai@xxxxxxx


thanks,

Takashi



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