HDMI Audio TV problems

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kuhla

Limp Gawd
Joined
Nov 21, 2005
Messages
472
Video card: 980 GTX
Drivers: 350.12 (also recent 350 betas and previous whql)
TV: LG 47LD500
OS: Win 8.1

Recently changed my setup so now I need to send my audio over the HDMI to the TV. Sounds simple right? So when the TV is off and I have just turned the PC on then....

http://i.imgur.com/nl5C0J8.png

....everything seems great. I have the options I want. It detects as connected by HDMI. I have the option to send audio. However as soon as I actually turn on the tv....

http://i.imgur.com/jadOUyG.png
http://i.imgur.com/wYMZEpS.png

....everything changes. A different monitor is detected. It appears to be going over DVI, not HDMI. Audio options disappear.

What happens if I unplug/replug the TV while the PC is on? Doesn't detect anything until I switch the tv to a different input and then back (or turn it off and then on).

I would rather not start screwing around with EDID editors. I don't want to but if I can't figure this out then I will have to invest in a converter box (link).

Any ideas of what I can try?
 
Before you hack EDID or buy a convertor, I would try using different ports on the TV, and/or setting the label on the port to PC (also try taking it off), the TV may send a different EDID when it's on and knows you want to use it as a monitor, because it's trying to be helpful.
 
toast0 said:
Before you hack EDID or buy a convertor, I would try using different ports on the TV, and/or setting the label on the port to PC (also try taking it off), the TV may send a different EDID when it's on and knows you want to use it as a monitor, because it's trying to be helpful.
Click to expand...

Tried different inputs and tried sending a different signal to see if I could figure out how the TV was deciding to change. None of that worked.

I actually borrowed a receiver from a co-worker and that is working better as it is detected properly as an HDMI device and allows me to send audio. I'll probably look into purchasing such a unit.
 
How are your other displays connected? I think I remember reading about some sort of conflict between different outputs on the GTX 980 with HDMI. It might have been with DP2 or DP3 and HDMI.

The TV might also be detecting the connected device as a PC and automatically forcing DVI connectivity. I would look up the documentation or support for your TV and find out if there is anyway to stop that behavior.

Update: According to the manual for your TV, what I suspected above is exactly what is happening. Have you tried connecting to HDMI 3 on your TV? It describes HDMI 1 & HDMI 2 as "HDMI In/DVI In."
 
Last edited:
Armenius said:
How are your other displays connected? I think I remember reading about some sort of conflict between different outputs on the GTX 980 with HDMI. It might have been with DP2 or DP3 and HDMI.

The TV might also be detecting the connected device as a PC and automatically forcing DVI connectivity. I would look up the documentation or support for your TV and find out if there is anyway to stop that behavior.

Update: According to the manual for your TV, what I suspected above is exactly what is happening. Have you tried connecting to HDMI 3 on your TV? It describes HDMI 1 & HDMI 2 as "HDMI In/DVI In."
Click to expand...

I have tried all three HDMI inputs on the TV. They all behave the exact same way.

I am able to drive all my video card's outputs simultaneously (4 outputs, displayport #1 monitor, displayport #2 monitor, hdmi reciever, dvi monitor).

I'm pretty convinced the TV was the problem by, as toast0 put it, "trying to be helpful".
 
kuhla said:
Any ideas of what I can try?
Click to expand...

Sort of a long shot here but the quirks appear to be from your TV so the first thing I would do is check for a firmware update for the TV.

Otherwise I'd just use something like a Gefen DVI Detective Plus (Plus is necessary for HDCP support) to fool the PC into thinking the monitor's always connected. This is something you can do in Linux with X11 in your config files, though. Too bad Windows doesn't support it.
 
dandragonrage said:
Sort of a long shot here but the quirks appear to be from your TV so the first thing I would do is check for a firmware update for the TV.
Click to expand...

I have a friend with the same TV. He contacted LG a while back for a separate issue. They told him the 47LD500 does not support firmware updating.
 
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