ATI/AMD TV out over HDMI, no bios / post

[AbRASiON]

Hi all,

Apparently this is a common issue?
I've got 2 cards here both of which, once in my awesome little HTPC will NOT display the bios boot stuff until Windows initialises the driver. It's really damned painful.
Can't run multi-OS and choose other OS, can't enter the BIOS, can't run a bootable memtest etc, because there's simply nothing on the display over HDMI?

Anyone else seen this personally? I've just gone and flashed the card from Gigabyte with a .71 revision firmware, alas, not fixed.
If I run VGA, it will work on the TV.

It's very annoying, my nvidia card works fine.
Bonus frustration: AMD has had this issue for 3 or 4 years through cards and yet it's still not fixed, any ideas?

 

[garagisti]

What cards, which are the os that you use, what drivers?

 

[AbRASiON]

There's a Sapphire 7750 card and a Gigabyte R9-280x 3gb OC edition.
The OS and drivers are completely irrelevant, this is before any OS is loaded.

 

[DownTheSky]

Mines post on the TV though I haven't tried with the main display disconnected.

 

[AbRASiON]

Which model do you have? I'm using a Yamaha amp and Panasonic TV but the nvidia card works dandy through HDMI.

 

[Atreidin]

I had a 7870Ghz edition that displayed POST on LCD TV through HDMI, now that I think about it, it worked on two different TVs. I don't have any of that equipment on this continent so I can't double check anything.

Might be worth asking the video card manufacturer about it, probably something misconfigured in the video bios.

 

[QuantumPion]

My HTPC has never shown bios screen over HDCP DVI->HDMI. It's very annoying because if I turn the screen off or even just change the input, I have to reboot the computer as the HDCP loses its link or some such. This is on an old 8600 GT though, which was like the very first video card to support HDCP at all. I don't know if the problem is with the HTPC or my projector.

 

[VirtualLarry]

Might be that the TV in question doesn't support the PC BIOS's resolution. It might not be the card, especially if it happens with two different cards.

 

[garagisti]

There's a Sapphire 7750 card and a Gigabyte R9-280x 3gb OC edition.
The OS and drivers are completely irrelevant, this is before any OS is loaded.

Well, i was doing some reading, and someone with some other card was suggesting that a bios update on a card fixed their problem. One guy was suggesting that a driver update fixed something like this, and so on.

Yes, it will always help if you were to not be condescending and specify what hardware and software you're running. Someone or the other may notice something amiss. You haven't specified what processor, motherboard.

By the way, i think that an answer above about HDCP link reset being the culprit. It seems very plausible. Shouldn't be happening, but then again, it is what it is. I also read elsewhere that a certain owner of XFX 280x was having problem with his card, and he spoke to the manufacturer, and he got it confirmed that the hdmi was not HDCp compliant. So while AMD specified HDCP compliance, which is necessary for hd audio/ video bit-streaming, it may be possible that some manufacturers cut some corners. You may want to revisit the manufacturer specification and seek some help from support on this. Sorry i don't have links, as that was searched up on phone last night.

Good luck!

 

[DownTheSky]

Which model do you have? I'm using a Yamaha amp and Panasonic TV but the nvidia card works dandy through HDMI.

Gigabyte 280x WF3 and a Panasonic TV.