Go Back   nV News Forums > Linux Support Forums > NVIDIA Linux

Newegg Daily Deals

Reply
 
Thread Tools
Old 08-29-08, 05:25 PM   #1
Ankh
Registered User
 
Join Date: May 2005
Location: Leicester, UK
Posts: 36
Default DVI to HDMI problem on EVGA 9500GT

I recently purchased the EVGA 9500GT in order to output to a HDTV. I use the DVI port along with a DVI->HDMI converter to a 3M HDMI lead. In parallel, I run a 3.5mm audio lead into the back of the TV, to provide the audio.

This setup worked fine under my old 7300GS using DVI->HDMI, but using the EVGA 9500GT, the TV is no longer outputting the sound. In addition, the TV is generating 'static clicks' over it's speakers with the audio lead plugged / unplugged, suggesting the noise is coming over the DVI->HDMI lead.

I've used headphones from the PC to confirm the sound is coming out of the headphone socket OK, so the only conclusion I can come to is that the 'static clicks' being generated over the DVI->HDMI output is causing the TV to ignore the 3.5mm audio lead input in favour of this false 'HDMI' audio signal.

Has anyone got DVI-HDMI working with the above product?

Cheers,

Rich.
Ankh is offline   Reply With Quote
Old 08-29-08, 08:55 PM   #2
MarkG
Registered User
 
Join Date: Jun 2008
Posts: 29
Default Re: DVI to HDMI problem on EVGA 9500GT

I had the same problem on my system. Drivers newer than 169.12 tell the TV to expect audio even if the output is DVI. You can either use older drivers, or on my TV, you can change a setting to always use the analog input, and ignore audio from HDMI.

Mark
MarkG is offline   Reply With Quote
Old 08-30-08, 03:08 AM   #3
Ankh
Registered User
 
Join Date: May 2005
Location: Leicester, UK
Posts: 36
Default Re: DVI to HDMI problem on EVGA 9500GT

OK, thanks for that - have installed 169.09 and will test when I get a moment.
Where did you read about this workaround? Does it just affect dual-link DVI ports, since driver 173.* works OK on my non-dual-link 7300GS DVI?

Cheers,

Rich.
Ankh is offline   Reply With Quote
Old 08-30-08, 04:56 AM   #4
Ankh
Registered User
 
Join Date: May 2005
Location: Leicester, UK
Posts: 36
Default Re: DVI to HDMI problem on EVGA 9500GT

OK, get audio with 169.09, but horrendous flickering too - will have to check 9500GT compat with that release.
Ankh is offline   Reply With Quote
Old 08-30-08, 09:18 AM   #5
Tr1cK
not coming back
 
Join Date: Nov 2004
Posts: 4,872
Default Re: DVI to HDMI problem on EVGA 9500GT

AFAIK 9500GT was added to the most recent releases. Mileage may vary with older drivers.
Tr1cK is offline   Reply With Quote
Old 09-01-08, 04:13 AM   #6
Ankh
Registered User
 
Join Date: May 2005
Location: Leicester, UK
Posts: 36
Default Re: DVI to HDMI problem on EVGA 9500GT

OK, have resolved this thanks to comments from MarkG.

I had to create a custom EDID and force the Linux Drivers to use this instead of reading it from the TV, using :

Option "CustomEDID" "DFP-0:/etc/X11/samsung.bin"

I got the TV EDID dump from the Xorg.log, amputated the Extension Block data (anything after byte 127, 0 base), reset the Extension Block count to zero (byte 126) and incremented the checksum by 1 (byte 127) and, tada, the 9500GT now doesn't send the audio over DVI, meaning the TV now plays back the RCA audio.

Cheers,

Rich.

//told you I was hardcore

Last edited by Ankh; 09-01-08 at 04:14 AM. Reason: tagline
Ankh is offline   Reply With Quote
Old 09-15-08, 03:22 PM   #7
bram
Registered User
 
Join Date: Nov 2003
Posts: 17
Default Re: DVI to HDMI problem on EVGA 9500GT

Ah... the custom EDID sounds interesting.
I am going to try this. (Although there was no EDID data in my Xorg.0.log file)
Thanks for posting.
bram is offline   Reply With Quote
Old 09-15-08, 04:01 PM   #8
jsumners
Registered User
 
Join Date: Sep 2008
Location: Fairburn, GA
Posts: 5
Default Re: DVI to HDMI problem on EVGA 9500GT

So you are saying the DVI->HDMI cable I bought today isn't going to fix my problem[1]. Just great. They need to provide some way to turn off this broken feature.

[1] -- http://www.nvnews.net/vbulletin/showthread.php?t=119420
jsumners is offline   Reply With Quote

Old 09-15-08, 04:15 PM   #9
bram
Registered User
 
Join Date: Nov 2003
Posts: 17
Default Re: DVI to HDMI problem on EVGA 9500GT

Removing the extended block works like a charm!
Thanks a million!
bram is offline   Reply With Quote
Old 09-15-08, 05:38 PM   #10
jsumners
Registered User
 
Join Date: Sep 2008
Location: Fairburn, GA
Posts: 5
Default Re: DVI to HDMI problem on EVGA 9500GT

Thank you for the instructions on how to solve this problem. It is so annoying that this has to be done, but at least it works.
jsumners is offline   Reply With Quote
Old 09-16-08, 02:03 AM   #11
Ankh
Registered User
 
Join Date: May 2005
Location: Leicester, UK
Posts: 36
Default Re: DVI to HDMI problem on EVGA 9500GT

Glad to have been able to help.

The Wikipedia article on EDID was key to generating the override file, so is a good place to reference if people are stuck.
Ankh is offline   Reply With Quote
Old 09-16-08, 11:18 AM   #12
AaronP
NVIDIA Corporation
 
AaronP's Avatar
 
Join Date: Mar 2005
Posts: 2,487
Default Re: DVI to HDMI problem on EVGA 9500GT

Thanks for reporting this, guys. I'll try to look into it soon.
AaronP is offline   Reply With Quote
Reply


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


Similar Threads
Thread Thread Starter Forum Replies Last Post
IOGEAR 3D Complete+ 4-Port HDMI Switcher with 2D/3D Video Processor News Archived News Items 0 06-28-12 06:40 PM
Problem connecting Pioneer VSX-S300 to Nvidia Ion - flat panel scaling solves it? wild_oscar NVIDIA Linux 3 06-17-12 08:18 AM
HDMI overscan fix for multiple resolutions + Zod Engine Problem. cheechr1 NVIDIA Linux 0 06-11-12 03:27 PM
Blu-ray 3D Movie Playback With PC on a 3D HDTV Using HDMI 1.4 News Archived News Items 0 05-16-12 04:30 AM

All times are GMT -5. The time now is 08:12 PM.


Powered by vBulletin® Version 3.7.1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 1998 - 2014, nV News.