7950 - no signal via HDMI until Windows boot

[foxrocks]

I've got an MSI Twin Frozr 7950. When connected to my Panasonic TV via HDMI, I get no image until Windows has loaded. Obviously this makes it impossible to do anything in the BIOS, and if I want to do that I have to try and borrow a monitor and do it via DVI, which is annoying!

Has anyone else had this issue? What could be causing it?

I've also tested it with an MSI 7870 and had the same problem. However my previous card, an MSI GTX 560 Ti, was fine. So it seems to be an AMD thing.

edit: oh yeah, it also doesn't work if I hook the TV up to the motherboard's HDMI and use the IGP

 

[Orch]

I have this same issue with a HIS 7850. On my old panny I'd get half a screen to work with, just enough to use BIOS, but with the new panny GT50 I only get a scrambled screen until windows boots.

Same as you, using HDMI from GPU.

Not needed to look into it any further up to now but interested to hear what you find.

 

[Orcvader]

From what I've noticed HDMI on TVs appear to react slower than HDMI on monitors when starting up. Might be best to get a normal monitor with HDMI and test it on that.

 

[foxrocks]

That could be it, except it wouldn't really explain why the 560 Ti worked absolutely fine.

 

[Doco]

I had this issue with my 7950 on my old 26" sharp (720p), I'd pretty much get no signal until windows logo, I remember reading about something along the lines of a tvs resolution is different to a monitors resolution and the compatibility was somewhere along this line, since I did upgrade to a monitor I havnnt had this issue so maybe their was something too it (dont kill me I'm not using a hdmi cable with my monitor, was just checking things when I first got it)

 

[imginy]

Yes amd seem to have really messed up with the 7 series and by default they run 540x480 resolution via hdmi.

I couldn't find a fix for it so had to give up on benchmarking.

Older amd cards work fine and so do all nvidia cards.

 

[Orch]

Damn that's disappointing isn't.

Good job I'm getting a monitor soon.

 

[shankly1985]

Yer this looks like the tv can't display the low resolution, and is looking for a resolution it can display Witch is 1080.
On the tv settings look to see if it as just scan or some sort of setting witch will upscale the image.

 

[imginy]

Yer this looks like the tv can't display the low resolution, and is looking for a resolution it can display Witch is 1080.
On the tv settings look to see if it as just scan or some sort of setting witch will upscale the image.

The newer tv's will display many different resolutions right down to 800x600 but these 7*** cards are putting out 540x480.

I don't think there's a fix for it.

 

[shankly1985]

The newer tv's will display many different resolutions right down to 800x600 but these 7*** cards are putting out 540x480.

I don't think there's a fix for it.

My tv has no issues displaying bios etc, I using amd cards. His issue could be a tv up scaling problem.
Either the tv up scaling feature is switched off or the tv just not capable of displaying it.

 

[foxrocks]

Ok cheers guys, I'll look at the scaling settings on the TV as I've never tinkered with them before.