Thank you for replies.
Curious, does your new Ryzen CPU have an APU or are you 100% dependent on the 970 GPU?
No, it's a CPU, not APU, as mentioned. I realize there are many users that mess with naming convention, but this is a CPU "only".
In the case of a modern MB, this is likely the default behavior of the video card, and unlikely it can be changed.
As mentioned, video card is the same. This is why it leads me to a belief the display order is being set by UEFI - exactly the same way as displays enumeration in any operation system. Because during bootup there's no operating system active, its role is fulfilled by UEFI code at this stage and some mechanism (simplified) must be set to generate POST at some specified display. I don't want to believe engineers can't detect active display
to put everything on there until proper operating system takes control over the PC, so I rather think they set up the display queue by some (unknown for me) rule. Maybe there are some workarounds - like I have read so far (removing cables from graphic card's sockets, booting up the OS, hard turning off the PC, switching cables back = but this one didn't work for me).
I remember I've tried to resolve an enumeration issue, but from operating system stage few years ago (similar problem, but not exactly the same) - and answers I've received both from Microsoft and nVidia showed they both try to blame each other, but don't even want to resolve it from their own side (that issue, like many others, could be fixed from any side, it just depends on who is willing to do that first). It's why I don't hope Gigabyte would do anything special (like behind the current UEFI options) about it, but I'm looking for some tricks instead... maybe I'll try something like connecting an old HDMI splitter from my drawer & additional HDMI cable which would break a HDCP protection, and enable secure boot to see what happens.
If you power off the TV and boot, does POST appear on your monitor?
It's not an option as I don't want to power off the TV almost all the time and power it on only when I'd like to watch a TV (uncomfortable messing with cables under/behind the desk). I presume it would POST on my monitor, because complete powering off the TV (if I get it correctly = plugging the power cable off the power socket) means lacking the 5V on HDMI, hence TV becomes undetectable.
If you are using any type of adapters with the DVI or HDMI connections, this might cause unexpected behavior.
I know, it's why I'm using "raw" cables.
Replying just turned me into EuP option in BIOS (disabled here by default) - from what I know, different countries treat "standby" mode different way, hence detection anything "standbyed" connected to a PC might be normalized by that option indeed. Let me check
... few minutes later - no, it was a blind shot :/ On the occasion I've learned EuP 2013 (MSI) is ErP here, and any combination of ErP with CEC 2019 won't for for me. TV doesn't have any configurable power option (when off) either.
Ok I think what is happening here. You went from non UEFI mother board to a UEFI board.
Thank you sir for explanation of "what is happening here"
but I assure you my old motherboard was UEFI-compliant as well (BIOSes 4.1 and up, I was using one of these).
What you have to do is disabled CSM in the bios. What that does it disables all the other UEFI other then the boot part of it.
I keep it disabled for long time, sir.
Any other ideas welcome.
Cheers,
Martin
