Sound issues with Dell Latitude 7490 (kabylake)

[Jakob Alvermark]

On 10/1/18 6:43 PM, Rodney W. Grimes wrote:
>> Hi
>>
>> While sound work out of the box (with headphone switching) on the 1-2 year
>> older Latitude 7270, it does not on my new machine.
>>
>> The internal speaker works fine. If I plug in external speakers in the
>> headphone jack, sound still goes to the internal speaker while a very load
>> buzz comes from the external speakers.
>>
>> Do we have a solution for this?
> I do not believe we have anything that detects stuff plugged into
> and removed from the newer sound stuff that needs switching to
> change from internal to external speakers.
>
> I think you need to do what I have to do when I plug in external
> speakers on my thinkpad x230:
> sysctl hw.snd.default_unit=1
>
> And when I unplug them I have to do:
> sysctl hw.snd.default_unit=0
>
> to switch back to the internal speakers.


Hi Rod,


Can you post the output of 'sysctl dev.pcm' and 'sysctl dev.hdaa'