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10-09-2014

israel

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W540 no HDMI audio in playback devices

2014-10-09, 8:05 AM

Hello,

i am trying to get the miniDisplayport to pass audio. i have a minidisplay port to HDMI adapter, a HDMI cable and a TV that i know can recieve HDMI audio.

however, there isnt an option for HDMI/displayport in the listing of playback devices:

playback devices.jpg

 

what can i do?

thanks,

Tom

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2508 Posts

06-13-2013

US

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Re: W540 no HDMI audio in playback devices

2014-10-09, 20:11 PM

Assuming your W540 has an nVidia discrete graphics chip, the miniDP port is part of the nVidia graphics digital audio hardware, not the Realtek HD Audio analog (i.e. speakers/headphone) hardware.  Have you installed the latest nVidia drivers?

 

I have a W530 and not a W540, but I would think if you had the proper current nVidia drivers installed it would also have included not only the graphics driver but the HDMI audio driver as well in the package.  When you connect the TV with the miniDP->HDMI cable you should see that digital audio option available in "playback devices".

 

Here's my own experiment a while back, connecting my own W530's miniDP output through a miniDP->HDMI cable (I don't use and adapter + HDMI cable, I use a simple straight-through cable with miniDP at one end and HDMI at the other) to my Panny 65VT50 HDTV.  Note that the digital audio option from nVidia was checked as the default in "playback devices", and I DID get sound from my TV.

 

Note that on my W530 I DO NOT USE OPTIMUS!!!  I have "discrete graphics" specified in the BIOS, and the built-in Intel HD4600 graphics is NOT BEING USED AT ALL!!  The Intel graphics doesn't show up in Device Manager, nor does it show up in nVidia Control Panel.  Again... I DO NOT USE OPTIMUS.

 

I run strictly using the nVidia K1000M on my W530, and am using the latest nVidia retail graphics driver 340.66 downloaded from the nVidia driver site and installed with my W530 in "discrete graphics" mode. Thus the miniDP connector on the W530 is guaranteed to be controlled by the K1000M, both for external monitor/TV video as well as for external digital audio.

 

 

 

 

 

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4 Posts

10-09-2014

israel

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Re: W540 no HDMI audio in playback devices

2014-10-12, 10:29 AM
hello and thanks for the reply!

i have a nVidia K1100M graphics crad.
i have installed the latest drivers from the nVidia website, it didnt help...

i tried to change settings in the nVidia control panel, however in the "select a task..." menu, i have only the "3D Settings" option!
how can i fix this?

thanks,
Tom
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Re: W540 no HDMI audio in playback devices

2014-10-12, 12:57 PM

What do you see in Device Manager for "display adapters"?  Do you show the K1100M (i.e. BIOS set to "discrete graphics")?  Or do you show the Intel HD4600 (i.e. BIOS set to "internal graphics")?  Or do you show both (i.e. BIOS set to "Optimus mode")?

 

If the K1100M is not shown, then I'm not surprised nVidia Control Panel is not showing you everything... although I'm honestly surprised the drivers installed at all in that case, if there was no K1100M because it was not enabled in the BIOS.

 

What are you using right now for your video display device?  The laptop screen, or an external monitor other than the TV, or the TV for video but just without digital audio via HDMI?

 

And what are the BIOS settings for Config -> Display (or whatever it's called on the W540, since my experience is strictly with my W530)?

 

And if using an external monitor, how is that monitor connected... using the VGA connector on the W540 or the miniDP connector?

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4 Posts

10-09-2014

israel

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Re: W540 no HDMI audio in playback devices

2014-10-16, 9:55 AM

in the device manager, under "display adapters" i see both "Intel(R) HD Graphics Family" and "NVIDIA Quadro K1100M".

 

for display i am using currently only the laptop screen, but sometimes i connect a toshiba TV via HDMI (using a displayport to HDMI adapter).

 

i have tried to change the BIOS settings, and after changing the "video mode on dock" to "Advanced" from "Standart", windows notified me that it found new hardware, and installed automaticly the K1100M drivers.

since then, the NVIDIA control panel lists all the opstions, not only 3D settings.

 

but - it didnt help my problem! but i have a feeling that i am now closer to the solution...

 

(here are my BIOS display seetings:

20141016_122217.jpg

)

 

any ideas?

thanks,

Tom

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