Solved Windows 11 Auto Color Management disables all IGCC Display settings and only way to set 10Bit over HDMI

Was tearing remaining hair out as I seem to have lost the ability to drive my 55" Sony screen (over Pioneer receiver) in 10 Bit mode after some updates.
It turns out that IGCC has lost all ability to even talk to the display properly as Windows 11 has now taken charge with "automatic color management".
Turning this unwanted "feature" ON was the only way to regain 10bit display output over HDMI with an Intel NUC12WSKi5.
Attached screenshots show DISPLAY settings blank in IGCC previously populated and where I was able to set Bit depth and color coding RGB etc.
Suffice to say that no driver version makes any difference here. Tried old and latest beta, installed, reinstalled, etc. no end.

Are you able to setup the correct profile in Control Panel > Colour Management at all?

trumpy81 said:

Are you able to setup the correct profile in Control Panel > Colour Management at all?

Click to expand...

Do you mean in IGCC? No, even clicking on “Custom” goes nowhere …

No, I mean in Control Panel > Colour Management.

Search for Control Panel from the taskbar.

I'm not sure it would be successful, but worth a shot at least.

If it's any consolation, I don't have the 'automatic colour management' option, probably because my monitors are old and connected via Display Port and not HDMI.

trumpy81 said:

No, I mean in Control Panel > Colour Management.

Search for Control Panel from the taskbar.

I'm not sure it would be successful, but worth a shot at least.

If it's any consolation, I don't have the 'automatic colour management' option, probably because my monitors are old and connected via Display Port and not HDMI.

Click to expand...

All of these graphic output settings under GENERAL, COLOR are missing in IGCC and not replaced by the old windows color matching options between different devices. Under Information I normally see display capabilities, even this info is unavailable and replaced with a red exclamation triangle ...

Well it was worth a look at least.

You will probably need to wait for an update to IGCC, or you can probably uninstall it as it is no longer needed by the sound of things.

I hope 'automatic colour management' is working OK?

Any need to tweak it?

Automatic Color Management for APP's is no match for all that has obviously gone missing. You can only switch it on or off. When ON I get 10 Bit color resolution RGB sent over HDMI to my capable screen. When using another screen I get 8 Bit dithered output. That is all.

Apparently the old BETA version 1.100.1300.0 of IGCC brings all Display settings back!