Arc quantization support missing and request for generic quantization option in Command Center

[LichtTho]

Good day, I have connected my newly received Arc A770 graphics card to my Asus VS248 monitor via 'pure' HDMI and have the issue that the picture shown is way too bright. I knew this problem from my former NVidia cards when they were connected via HDMI, so that I needed to adjust the HDMI input range to 'full' to show the full color range, especially for black 'colors'. For Intel graphics processors, as I also knew from my iGPUs, this is achieved by modifying the 'Quantization' setting. This option, however, is completely missing in the Intel Graphics Command Center for my Arc card, so I am stuck with totally 'washed-out' colors the whole time for now. I have the same issue with Intel iGPUs of type 530 when I connect them to monitor DVI inputs via adapters. For many hours, I have tried out a lot of official (i.e. by Intel themselves) and inofficial suggestions to remedy this issue, and I have also read up on Intel's official statement regarding the quantization setting, namely that it's dependent on the hardware connection type and would be detected automatically by the corresponding system(s), which I thought was fair enough at the time, but of which by now I really have to tell you: This is totally unacceptable, because it just isn't working correctly. Therefore, I hereby request that Intel make the 'Quantization' option available in general in their Graphics Command Center, regardless of the hardware being detected, similar to NVidia, as this proves to be a lot more customer-friendly. If this really isn't done due to some perceived specification violation on part of Intel, then put the option behind a disclaimer, telling people to use it at their own risk etc.. But for the love of God, make it available, please - nobody is going to bring me back my time invested in researching this and trying to remedy it by myself, not even mentioning money involved, and I am sure that I am not the only one with this issue! Kind regards Tom

[LichtTho · Accepted solution]

Replying to my own thread, since I've found the / a solution:

You need to plug an additional hardware adapter in-between the HDMI cable and choose a different output or different input. The type of adapter doesn't seem to matter.

So what I've tested is:

1. Monitor (DVI) -> DVI-to-HDMI adapter -> HDMI cable -> Intel Arc Graphics Card (HDMI) (-> works, color range is normal now)
2. Monitor (HDMI) -> HDMI cable -> HDMI-to-Display Port adapter -> Intel Arc Graphics Card (Display Port) (-> also works, color range is normal now)

These solutions might work with other Intel cards / iGPUs in combination with certain Intel drivers / driver versions as well.

[powerarmour]

Yes, unfortunately Intel in their wisdom chose not to put native HDMI ports on their cards (DP to HDMI via LSPCON) but only allow colorspace adjustment via their IGCC software for native HDMI connections.

The only thing you can do at the moment (until Intel allows this adjustment on all connections like their competitors) is to try some adaptors and hope you get lucky (as you've found!)