10-25-2011 05:02 PM
I have an HP HDX X18T-1200 CTO Premium Notebook PC.
I am running Windows 7 64-bit, Service Pack 1.
Some time ago, the audio stopped working when connecting an HDMI cable to my tv (perhaps after a driver update?). It still outputs on the laptop itself.
Under Control Panel : Sound, the NVIDIA HDMI Output device says it is "Not plugged in" and is grayed out so I can't set it as the default device. I can see the video output on the tv, but the audio doesn't go there with it, even when setting the video mode to Projector Only.
I have tried uninstalling the IDT High Definition Audio CODEC and the NVIDIA High Definition Audio drivers from Device Manager, but that has not helped. The IDT driver is version 6.10.6276.0, and the Nvidia one is 126.96.36.199. Both are as up-to-date as possible I think.
I work in the IT industry, so I'm not a total idiot when it comes to this sort of thing, but this has me perplexed. Any help would be appreciated. Thanks!
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10-26-2011 01:04 AM
Mine is also not plugged in but when I plug in it works. Have you checked your cable ?
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10-30-2011 09:12 AM
I have several HDMI cables, and I have swapped out for another known good one (the one that is normally connected to the DVD player). Same problem.
10-30-2011 05:50 PM
I worked in IT for many years and I appreciated all trails leading to success, so here goes...
One: I cannot find it now to save me, but I know I read this last week (looking for something else semi-related): the ORDER of events is sometimes the key to success. Which device Powered on first, second... This is not the case after the first time - just to get things initialized and working. Will post if I find it. If everything else fails to bring joy - turn it all OFF and try different boot sequences. Yeah, I know...
Here is what I could find today. It is perhaps related - maybe you can pull some information from it that will help:
10-30-2011 09:36 PM
So I uninstalled drivers and tried to install older ones. So now I have NVIDIA High Definition Audio 188.8.131.52, and IDT High Definition Audio 6.10.6225.0. I also rolled back the display driver for NVIDIA GeForce GT 130M to 184.108.40.20644.
Now the playback devices list shows the NVIDIA HDMI Out correctly, and knows when the cable is plugged in. It also allows me to select it as the default device. But there is still no audio coming out of the TV, even though the bars in the playback devices list show it sending something out.
Closer to the goal it seems, but still not quite there. Any other ideas?
10-30-2011 11:16 PM - edited 10-31-2011 06:10 PM
Edits Made to this Page Content:
31 October 2011
Content Adjusted - Original suggestion would not be useful as presented (as later comments will attest). Just didn't remenber - it's been a number of years...
Examples left here for only one purpose - reference for sound quality and NOT for HDMI output setup.
Sound quality can be affected by adusting this setting (when balance, treble, other settings) are where the user wants them
and things are still "not right".
10-31-2011 05:05 PM - edited 10-31-2011 05:53 PM
Pawing through this is bringing back memories - too bad it isn't bringing back useful notes...
OK - found this. You may have already done this...
You have to assign the Default sound set to Digital Output Devices (SPDIF) in the Sound settings Control Panel.
10-31-2011 05:44 PM
This is unfortunately the only TV I have.
I noticed in the FAQ that they say "we have seen many cases where having a bad video driver resulted in no HDMI audio" but it seems like using the updated video driver caused more problems than it fixed, based on what I've already explained.