Peter Chant wrote:
> Clemens wrote:
>> Pete wrote:
>>> Linux phoenix 4.17.3:
>>> --- no soundcards ---
>
>> There should be an error message in the system log.
>
> Jul  2 19:44:10 phoenix kernel: [   12.072075] snd_hda_intel 0000:09:00.1: 
> Handle vga_switcheroo audio client
> Jul  2 19:44:10 phoenix kernel: [   12.072299] snd_hda_intel 0000:09:00.1: 
> SME is active, device will require DMA bounce buffers
> Jul  2 19:44:10 phoenix kernel: [   12.072525] snd_hda_intel 0000:09:00.1: 
> SME is active, device will require DMA bounce buffers
> Jul  2 19:44:10 phoenix kernel: [   12.072827] snd_hda_intel 0000:0b:00.3: 
> SME is active, device will require DMA bounce buffers
> Jul  2 19:44:10 phoenix kernel: [   12.073056] snd_hda_intel 0000:0b:00.3: 
> SME is active, device will require DMA bounce buffers

No errors here.

You might try disabling SME (secure memory encryption) in the BIOS,
but in theory, this should not make any difference.


Regards,
Clemens

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