Bit of HDMI techie help needed from you lovely lot please

Vingtetun

Vingtetun
New card is lovely. Game is even more stunning. The difference on changing cards is simply beautiful. Works beautifully on the usual monitors.

However, connected to LG 50 plasma, it won't work at more than 1080i.

Yes, it will do 1080p in theory but don't know how to achieve it.

So.... the details:
R9 290 out via hdmi
Yamaha rxv667 passthrough
LG 50PM670T in via hdmi

I briefly see an image on switching to 1080p but it bums out after a fraction of a second.

Cannot connect up differently as is part of the wired mancave....

Cheers in advance, commanders!
 

mid_gen

M
Any sparkling in the dark areas before it changes? I had loads of problems with 1080p 60hz on my LG TV until I changed out the HDMI cables for better quality one.
 

Vingtetun

Vingtetun
Nope. Just flicks off. Cablea are high quality as it is part of the wired home cinema and I specced it nicely before 1st fix.....

The old card just worked. New one works up to 1080i but no higher which given it is newer and more powerful version of same family, is odd.

I didn't check the res of old card to the tv, however it worked as soon as it was plugged in...

New one have had to explicitly downgrade he video signal to get a picture.
 

ZaphodBeeble

ZaphodBeeble
I'd try a fresh install of the drivers. That might help. When you start the driver install there should be an option to do a clean install.
 

Adam Lusardi

A
^^^
If you updated drivers......
Are you using catalyst control.
I was asked by support to update last night .....pain.
Well I now run 14.4 makes sure you uninstall the old drivers via the download.
Oh and you gain a lovely gamers friend finder util. disabled straight away.
 

Splendour

Splendour
A signal booster may do the job - something like this on the end of the cable run then a short cable to the screen. HDMI booster

We use them at work for AV installations with long HDMI runs (15+ meters), or where the signal source is weak
 
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SnowGhost

S
See if there is a firmware for any/all of the equipment in the chain. So that is, the Video card, the Yamaha or the TV itself.

If the TV has two HDMI in ports, try the other one.

Check that the Yamaha hasn't changed it's setting from passthrough to fiddle with the image, or is overriding the signal from P to I.
 

Vingtetun

Vingtetun
Tested with pc in the mancave on a short cable run so shouldn't be signal loss.

Firmware all up to date.

Could it be overscan issue?

Will look at whether the receiver is buggering around. Can climb on the wall and put a long hdmi direct to tv for testing as well.
 

Alphasite

A
You can force the card to broadcast on certain output formats within CCC, just add 1080p as a supported profile and then output in that format. I dont really know the risks of this, but i'd assume the TVs builtin scaler can handle it.
 

ZaphodBeeble

ZaphodBeeble
Is the TV being detected as 1080p capable in your graphics properties? It's been an age since I used ATI, ahem I mean AMD, so I'm not sure where you'd find it.

Have a mooch about in the settings and stuff. The TV will report it's capabilities to the computer via EDID (Wiki Explanation) so it should be showing up as 1080p. If not, you may need to override the EDID somehow. Perhaps a firmware issue as mentioned above. Incompatibility of graphics card and TV. Try unplugging the TV from the wall for a couple of minutes to give it a good reset.

If you need to override the EDID you'd need a DVI to HDMI cable. You have to cut a couple of the pins out of the DVI connector. I've done it to my cables in the past for my projector setup. It wouldn't work in 3D so I had to convince the computer it was a different projector. Snip snip.
 

Mobius

Mobius
the issue lies with the TV , I had the exact same issue with my old plasma TV and my PS3. I would get a annoying flicker on the tv at 1080p like the tv was switching between 1080p and 1080i so had to get it to display at 1080i to stop it, the xbox didn't have the issue. the PS3 would display fine at 1080p on other plasma TV's. the TV isn't broken but shows a compatibility issue. take it back and get a different model.

this doesn't help your issue but ive seen your issue before.
 

Vingtetun

Vingtetun
Is being reported as 1080p capable at 70hz when I look in Catalyst. However, no joy on output.

Going to dry displayport to HDMI adapter as well as a dvi to hdmi.

Will try and eliminate the receiver from the equation as well using a spare long cable.
 
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