HDR Woes. Dell Precision 7520 & Quadro M2200 - 10 bit 60hz?

Hey guys. Thought i'd drop a message on here to see what you might think about this, as i think I've exhausted all of my limited knowledge on the matter! Any input extremely appreciated.

I've got a dell 7520 which allegedly has display port 1.4 and hdmi 1.4 (odd but OK).

Issue i'm battling with is that I cant get 10-bit HDR at all over mini display port, which I had thought would be possible.

The weird thing is that using the hdmi 1.4 port, it will now recognise HDR in windows and allow 10-bit colour, 4k up to 30hz. (I didnt think HDMI 1.4 carried HDR at all, but maybe it is just about managing to shovel it through it's bandwidth, or the port has been updated somehow).

I was hoping to get 10-bit 4k at 60hz, but nvidia control panel is having a beast and is jammed at 4k 60hz 8-bit no matter what.


Notes:

- I've put it into discrete graphics mode, thus running the quadro by itself.

- Latest Bios

- TV is a Samsung KS7500 (KS8500 US), and has a 10-bit panel.

- Brand new high speed verified Xbox one x HDMI cable.

- Mini display port 1.4 to HDMI 2.0b adapter. https://www.amazon.co.uk/Mini-DisplayPort-HDMI-Active-Adapter-x/dp/B01B702YTG . Might be this SOAB, but technically should work.


Hopefully one of you knowledgeable chaps might be able to point me in the right direction, or just plain shut it down as impossible for some reason

Cheers!

Not sure if it helps, but I've never got 10-bit color to work correctly on my Samsung TV (Q7F) using AMD Radeon cards.

I use RGB Full at 8-bit and HDR works at 4K 60Hz.

Ahh, the joys of owning an Optimus Notebook. You have no idea what is controlled by the onboard graphics (limited to DP 1.2, which does not support HDR) and what is not. Answer: your onboard graphics is ALWAYS running even with discrete forced, it's just forced to use the discrete for all rendering, and then output completed frames to the onboard, so you can continue to use the laptop display.

According to this thread, your BIOS might have an option to switch these over to Discrete, at the cost of battery life.

I'm not sure this still exists for the 7720, but the 7710 (and 7510) had an optional "Graphics special mode" in the BIOS that forced the discrete GPU to control of all external display outputs. By default, the integrated GPU is used for those outputs (except the underside dock connector) and the discrete GPU is only enabled when Windows/drivers detect that its additional horsepower is required -- but even then, operates as a render-only device that passes completed frames to the integrated GPU for output rather than controlling the outputs directly.

Click to expand...

https://www.dell.com/community/Lapt...ettings-on-Precision-7720/m-p/5185118#M939694

https://www.dell.com/support/articl...hics-special-mode-setting-in-the-bios?lang=en

Intel is being lazy about supporting new display standards, and thus you're stuck with this crap.

2 things.
If your gfx output uses NVidia you may need the DP 1.4 update.
https://www.nvidia.com/object/nv-uefi-update-x64.html

Make sure your adapter has the latest firmware update.
If they dont provide updated firmware for it and the above doesnt work, you might be out of luck.

My Club3D DP1.4 to HDMI 2.0b CAC-1080 wouldnt do HDR until I put the latest firmware on it.
Which stupid scan.co.uk insisted wasnt possible heh, they think a DP to HDMI 2.0 adapter is just a wire.

The DisplayPorts on the M2200 are version 1.2, not 1.4. You can see if the firmware updater works, but I wouldn't be surprised if it doesn't. HDR only works with DisplayPort 1.4 and HDMI 2.0 or higher.

Armenius said:

The DisplayPorts on the M2200 are version 1.2, not 1.4. You can see if the firmware updater works, but I wouldn't be surprised if it doesn't. HDR only works with DisplayPort 1.4 and HDMI 2.0 or higher.

Click to expand...

Yeah, even if you can get the discrete outputs controlling things, if they din't spec the ports for 1.4 operation, then you're stuck.

Welcome to Optimius, where we do our very best to hide the capabilities of your discrete card

Thanks a lot for the input guys. Still never managed to get around it so put it on the backburner for now.

- Nvidia firmware update just came back with a message saying it was for standalone cards only.
- According to the dell documentation, the 7520 should have displayport 1.4, but god knows in reality how you can check.

I've had some mini displayport issues in the past. I cannot get my GTX 650 or 1070m to work above 120hz on 2 different high refresh rate displays. My desktop cards work fine. I always assumed miniDP has some weird issue going on.

But MiniDP can drive the same amount of bandwidth full size DP can. There should be no reason this is happening but it is. I gave up on my Mini DP woes.