Aurora R12, RTX 3080 will only boot with DP

Drivers won't change anything, drivers are initiated after boot. System bios is for the motherboard, you need to update your vbios in case you aren't on the latest vbios for your card

What happens when it does not boot? It just sit there, or does it show any flashes on the Alienware head? (power button).

What is make and model of HD-TV?

Is it 1080p or 4K ?

Is HDMI directly connected or running thru a AVR/Amp ?

What rating or kind of HDMI cables are you using? Also, how long? I've found that high-quality HDMI cables with the thicker-gauge straight-thru wires inside ... are better than Redmere ones.

If not hardware-related, might be a setting on TV or related to HD-CP .

Thanks. I checked after your response and it has the latest vbios as well.

Thanks. Its a 4k TV.  Its an older  LG (LG 43UK6500AUA: 43 Inch Class 4K HDR Smart LED UHD TV w/ AI ThinQ® | LG USA)I have tried running through my KVM and directly to an hdmi port on the tv as well. Have tried a few different hdmi cables as well. The thing is the HDMI works as long as something is also plugged in the display port. I am thinking about getting a dummy display port plug for headless use and just plugging that in to see if I can get around this garbage (just wont ever be able to get into the bios as the hdmi video does not come up until windows starts)

Sorry I may have mis-stated. It appears to boo, just no video. The lights come on, the keyboard appears to be functional (press numlock changes the light on the keyboard) There is just no video. 

It could be that your HDMI output settings are out of range for the connected TV. Like to high of a resolution, to high of a refresh rate, etc...

Try changing to 60 Hz, 1080P, 8 bit RGB.

Hi, is it just the HDMI not working when connected to the TV? What if the HDMI is connected to your other monitor?

I'm using the LG 48in C1 OLED. I'm connected HDMI 2.1 with 4K, 10bit and 120Hz. It boots up fine.

It could be the HDMI cable itself.  Even if the GPU and TV support HMDI 2.x but you are using a HDMI 1.x cable, that could be causing the problem.  It's hard to tell the difference between 1.x and 2.x cables.  Even though you tried several HDMI cables, if they are all the older specs, none of those cables might work.

HDMI Cables - Different Cable Types

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@NL5 wrote:

1. I have tried running through my KVM and directly to an hdmi port on the tv as well.

2. Have tried a few different hdmi cables as well.

3. The thing is the HDMI works as long as something is also plugged in the display port. 

4. just wont ever be able to get into the bios as the hdmi video does not come up until windows starts)

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1. Well, whenever troubleshooting this, I would try connecting 4K-TV directly to computer with a HDMI cable.

2. Good (but still, see above).

3. Yeah, then maybe not HDMI cable ... but you will only know problem after you get it working.

4. No BIOS over HDMI ... Years ago (before DP caught-on) users posted about this. I never really tried it but reports diminished.

One reason I posted ... Not many of us actually have TVs connected to WinTel computers these days. I play movie files (audio/video as perfect as a real BluRay) with Kodi, and even some older games are pretty cool on projector.

https://www.dell.com/community/XPS-Desktops/XPS-8700-SB-Recon3D-no-5-1/m-p/6127101#M16029

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@ankhee1907 wrote:

I'm using the LG 48in C1 OLED. I'm connected HDMI 2.1 with 4K, 10bit and 120Hz. It boots up fine.

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Good post.

What machine and video card? Can you see the BIOS if you want to?

It is normal usage. You will see the Alienware logo. I can press F12 for the boot options etc.

I'm using the i7 version of Aurora R12 + RTX 3080 graphics card. Using the latest BIOS and vBIOS with ReBAR enabled.

 Thanks. I have tried connected directly to the tv with the same results.

As far as the no bios over hdmi, I have that same problem on *some* of my older GTX1080's as well, but they do start displaying once windows loads so its not  huge deal as I have very little reason to ever change my bios settings. 

I use the tv primarily because I am getting old my eyes aren't what they used to be. I sit a few feet back from a 43" tv so I can see it (mostly for work). I don't think I have used a regular monitor in a very long time. As for streaming movies and what not, most of that I do with plex on either a roku or amazon firestick on other tv's in the house. Thanks for the response!

No , I dont see the Alienware logo over hdmi. Only over the display port. And again the bigger issue is I never get video at all over the hdmi connection UNLESS I have an active source plugged into the display as well.

Thanks!

Yes, I understand the problem and your proposed solution.

As @ankhee1907  posts ... it can work properly.

For whatever reason ... the combination of your computer, video-card, and monitor does not see a suitable Display-Mode to boot the computer (over HDMI). AFAIK a couple of different Display-Modes are used to get all the way inside Windows.

IIRC, another user had a similar problem with a 4K-TV, and it was a setting on the Smart-TV.