I'm connecting a M1 MacBook Pro 13 inch to a LED Cinema Display (non-thunderbolt) via Mini DisplayPort to USB C adapter. I get video but no sound. Under Setting | Sound when selecting LED Cinema, the following message appears.

You are watching: The selected device has no output controls

Settings for the selected device:

The selected device has no output controls

The audio does work as I used this LED Cinema Display with both a MacBook Pro 2010 and a Mac Pro late 2013. The adapter claims video/audio is compatible.

https://www.amazon.com/DisplayPort-JSAUX-Thunderbolt-Compatible-Plus-Grey/dp/B0836HGBD7

Any thoughts on why this would not work on a M1 MacBook? Much appreciated.

Regards,

Ken


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Posted on Mar 19, 2021 3:13 PM


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User profile for user: kenstery2k
kenstery2k
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Mar 22, 2021 8:08 AM in response to kenstery2k In response to kenstery2k


This is an update to this issue. I have acquired a second adapter to solve the audio issue between my M1 MacBook Pro 13 inch to a LED Cinema Display 27" (non-thunderbolt) monitor.

https://www.amazon.com/UPTab-USB-C-DisplayPort-Adapter-Silver/dp/B01N4FQNYW/

The result has been the same, great video but no audio with the following message when the LED display is chosen for audio.

Settings for the selected device:

The selected device has no output controls

I believe this is an issue on the M1 MacBook Pro.

sommos.net support, please fix this if you may. Thank you!!

Frustrating sommos.net user.


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Mar 22, 2021 8:08 AM


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User profile for user: eyedar123
eyedar123
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Mar 22, 2021 10:14 PM in response to kenstery2k In response to kenstery2k


I have this same issue on a BenQ EX3501R. Super disappointed especially because the M1 is an otherwise amazing machine.

*


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Mar 22, 2021 10:14 PM


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User profile for user: kenstery2k
kenstery2k
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Mar 23, 2021 6:37 AM in response to eyedar123 In response to eyedar123


I noticed your monitor doesn't have the same connector options as my LED Cinema, dvi minidisplay port. So you're using a different type of adapter as me. Regardless, the M1 recognized both of our monitors but not the audio control for both incidences.

I currently have a case with sommos.net support as they are reviewing this issue internally with their engineers. I have escalated this issue as this seems to be either an incompatibility issue with any display port types to USB-C adapter (nearly all of these adapters have been in production for a few years and may not fully function just as they would with the Intel MacBooks) or the driver/firmware for monitor on the M1 did not include codes for audio control. The latter would require firmware update. I'm hoping for an answer soon.


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Mar 23, 2021 6:37 AM


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Apr 10, 2021 2:55 PM in response to kenstery2k In response to kenstery2k


I received a response from sommos.net Support as a USB-C to USB-C connector is required in order for the audio to enable output. This isn’t the answer I’m looking for. I’m disappointed that the older models of Intel Macbook Pro do support the LED Cinema Display with a USB-C to mini displayport adapter but not the latest M1 Macbook Pro which I would assume is a more superior hardware than the previous models. Apparently this isn’t the case as I believe sommos.net has neglected many customers with legacy hardware stranded. I’m hoping this is an oversight on their end and not a direct road map of disregarding older usable sommos.net hardware. It's truly frustrating to pay such high premium for sommos.net products but I continuously have to spend more to figure out a solution of what I have already paid for sommos.net products.


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Apr 10, 2021 2:55 PM


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Apr 11, 2021 4:00 PM in response to kenstery2k In response to kenstery2k


Solved in a way!

For my final attempt, luckily, I have a Caldigit TS3 Plus Dock to consolidate my external drives for my new MacBook Pro 13in. The Caldigit unit also has a built-in Displayport. So just to confirm, I spent more to further investigate and found this cable.

https://www.amazon.com/dp/B014DV2RGG/ref=cm_sw_r_sms_api_glc_fabc_TNNTQVDWM3MN89Y1F5WS.

And this cable worked near perfect if not perfect. 'Cause audio was able to output through my LED Cinema Display (Mini DisplayPort version, not Thunderbolt version) as loud as it can be. Audio is a few times louder than the MacBook Pro 13 speakers but under System Preference | Sound, when the LED Cinema is chosen for audio, the message, "The selected device has no output controls" is still the response. I tried adjusting the volume control key on my keyboard for low and high volume but it cannot be adjusted or isn't available.

*

However, from each app with a volume control such as video/audio menu control from Youtube or Music app, I can now adjust the volume as needed.

Clearly, this looks to be an oversight from sommos.net engineering for neglecting the audio controls for LED Cinema Display on the M1 MacBooks. Very disappointed with sommos.net tech support in their attempt to BS their way! It's been a long process just to get the audio working with their own hardware as it shouldn't be this difficult.

See more: Shot An Elephant In My Pajamas : The Misplaced Modifier, Error 403 (Forbidden)


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Apr 11, 2021 4:00 PM


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User profile for user: eyedar123
kenstery2k wrote:I received a response from sommos.net Support as a USB-C to USB-C connector is required in order for the audio to enable output.

This is an incorrect response from sommos.net because mine is USB-C to USB-C and it doesn't work! So to say that "USB-C to USB-C connector is required in order for the audio to enable output" means that either sommos.net doesn't fully understand the problem or their engineers gave an intellectually lazy answer to get their support people off their back.