Disable HDMI audio on nVidia 9400GT under Windows

Forums › Home Theatre (including HTPC and EPG Collector) › Disable HDMI audio on nVidia 9400GT under Windows

pico

54 posts

Master Geek

#72872 3-Dec-2010 20:39

Hi all,

I have a mediaportal installation connected to my LCD display. The nVidia driver detects this and activates HDMI over the DVI port. Problem is that my LCD display overscans the video and I am unable to fix this. I know that if I can force the graphics card to output a pure DVI signal (ie no audio) then the TV will display the video correctly as I have done this in the past. Problem is that there doesn't seem to be any setting in the nVidia control panel to modify this (v260.99). Also this is on Windows XP.

I've tried a bunch of hacks on various forums but none of them seem to do anything. Any help here would be appreciated.

Regards

Pico

richms

28192 posts

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Lifetime subscriber

#412650 3-Dec-2010 21:25

What screen? I would be talking to them about it being unsuitable and seeing if there is newer firmware for it to correct that problem.

Richard rich.ms

Nety

2584 posts

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#412946 5-Dec-2010 08:38

I cannot confirm for that version of driver but in the past when you look in the TV resolution options in the video card driver there should be each resolution listed with audio enabled and one with it disabled.

Media centre PC - Case Silverstone LC16M with 2 X 80mm AcoustiFan DustPROOF, MOBO Gigabyte MA785GT-UD3H, CPU AMD X2 240 under volted, RAM 4 Gig DDR3 1033, HDD 120Gig System/512Gig data, Tuners 2 X Hauppauge HVR-3000, 1 X HVR-2200, Video Palit GT 220, Sound Realtek 886A HD (onboard), Optical LiteOn DH-401S Blue-ray using TotalMedia Theatre Power Corsair VX Series, 450W ATX PSU OS Windows 7 x64

hashbrown

463 posts

Ultimate Geek

#413710 6-Dec-2010 20:15

Haven't come across your overscan issue but do have the issue with HDMI audio on my 9500GT. Long saga of crappy support from NVIDIA, so have given up and now update drivers infrequently and use a reg hack that forces the EDID for the panel to one that doesn't support HDMI sound.

Let me know if you haven't found this one yet, and I'll try to dig it up for you.

pico

54 posts

Master Geek

#413756 6-Dec-2010 22:24

hashbrown: Haven't come across your overscan issue but do have the issue with HDMI audio on my 9500GT. Long saga of crappy support from NVIDIA, so have given up and now update drivers?infrequently?and use a reg hack that forces the EDID for the panel to one that doesn't support HDMI sound.

Let me know if you haven't found this one yet, and I'll try to dig it up for you.

?

hi hashbrown

could you post link? I've seen a few hacks but haven't managed to get them to work. Might need an older driver.

hashbrown

463 posts

Ultimate Geek

#413814 7-Dec-2010 06:54

The solution in the thread below is the one that works for me. If you know what you are doing you can just hack the registry directly.

http://forums.guru3d.com/showthread.php?t=282549

pico

54 posts

Master Geek

#414205 7-Dec-2010 19:28

hashbrown: The solution in the thread below is the one that works for me. If you know what you are doing you can just hack the registry directly.

http://forums.guru3d.com/showthread.php?t=282549

Hi Hashbrown

Thanks for your help. You indirectly helped me find this page: http://forums.nvidia.com/index.php?showtopic=58483&st=120

Post 124 in the quotes is what worked for me. I had tried this before but I realised that I had misinterpreted the binary string (using 8 instead of B). Changing all the strings to this has fixed my problems.

Cheers.