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5 Posts

02-19-2021

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Thinkpad T450s & 40A2 Thinkpad Ultra Dock no sound output via HDMI

2021-02-19, 10:06 AM

Hi,

 

I have been using my Thinkpad T450s connected to a SONY TV via the mini Displayport > Adapter > HDMI with no problems for 2 years. Last week I purchased a new 40A2 Thinkpad Ultra Dock and connected it to my TV via HDMI. There is no sound output at all to the TV anymore. 

 

If I connect earphones to the laptop, no problem. If I change the sound output device (Win 10) to "Speaker/HP (Realtek High Definition Audio)" then again no probelm, sound comes out of the laptop speakers fine. If I connect the laptop to my SONY TV whilst it's in the dock, but directly via the mini Displayport > Adapter > HDMI, then sound comes out of the TV no problem.

 

So clearly the issue is only when I connect the laptop, via the dock using HDMI to the TV.

 

I have seen other reported issues with Sound output via the 40A3 dock, but have not found a fix as yet. Can anyone provide any help and help me to get sound to my TV via the dock/HDMI.

 

Thanks in advance.

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5 Posts

02-19-2021

United Kingdom of Great Britain and Northern Ireland

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Thinkpad T450s & 40A2 Thinkpad Ultra Dock no sound output via HDMI

2021-02-19, 16:19 PM
Well this is strange, sound has started working!! Did not change a single setting, or install any updates!! Very strange!
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5 Posts

02-19-2021

United Kingdom of Great Britain and Northern Ireland

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Re:Thinkpad T450s & 40A2 Thinkpad Ultra Dock no sound output via HDMI

2021-02-23, 14:13 PM

OK, looks like I spoke to soon! Weirdly, windows sounds are working (all be it with a tiny delay at the start of any sound/notification) however no media sounds play. So no sound from any Youtbue videos or any local media files! Again if I connect the laptop to the TV (via HDMI and adapter) rather than via the dock, everything works fine! Any help would be appreciated.

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6676 Posts

08-02-2018

Philippines

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Re:Thinkpad T450s & 40A2 Thinkpad Ultra Dock no sound output via HDMI

2021-02-23, 16:38 PM


Hello Fox74!


Welcome to community forums


The Thinkpad 450s doesn't seem to have a compatible docking station based on this link: https://accessorysmartfind.lenovo.com/#/search?categoryL1Name=Docking&categoryL2Names&keyword=&pageIndex=1&pageSize=40&query=&subSeriesList=22TP2TT450S&systemId=22TP2TT450S

So there is a possibility that the issue is most likely a compatibility issue. However, you can try installing the firmware utility driver of the docking station here: https://support.lenovo.com/us/en/solutions/pd028011

Hope everything goes well for you.

 

 


Jwes_Lenovo



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612 Posts

06-26-2016

Germany

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Re:Thinkpad T450s & 40A2 Thinkpad Ultra Dock no sound output via HDMI

2021-02-23, 18:27 PM

you may  need to enable  and select  the TV as your default audio device  using the Sound control panel. 

Make also sure  TV is available in device manager  in 'Audio inputs and outputs' and  an  Intel Display Audio device is available in  'Sound, video and game controllers'

 

 

 

Tech-Savvyness does not replace reading the fine manual.
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5 Posts

02-19-2021

United Kingdom of Great Britain and Northern Ireland

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Re:Thinkpad T450s & 40A2 Thinkpad Ultra Dock no sound output via HDMI

2021-02-24, 9:33 AM
Done all of that, was all OK. I have had to resort to going back to connecting my TV via the mini-displayport port and adapter, and not via the dock.
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5 Posts

02-19-2021

United Kingdom of Great Britain and Northern Ireland

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  • Registered: ‎02-19-2021
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  • Message 7 of 7

Re:Thinkpad T450s & 40A2 Thinkpad Ultra Dock no sound output via HDMI

2021-02-24, 9:40 AM
Thanks, the firmware update utility reports I'm already on the latest version.
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