Z690 UD doesn't boot with CSM enabled

[GusFring1]

Hi, so I updated my setup and got a i7 12700k with a Gigabyte Z690 UD DDR4 mainboard bios already updated to F5A (latest)
My main monitor is connected via DP to my Nvidia GPU and my second monitor via HDMI to my mainboard/intel gpu.

In the Bios are a few settings which I would need to use but those are only available with CSM enabled.

But as soon as I enable CSM issues will start, I can boot into windows 1 max 2 times and after that I will get stuck in a Blackscreen with a blinking underscore on the top left.
If I try to get into the bios then I will stuck in a blackscreen afer hitting DEL, mouse/keyboard are active and the monitor is black screening, not in idle.
But I won't get a image of the Bios, aftr that I have to pull out the mainboard battery, reset bios and then continue without CSM to use my pc again.

Is there any fix, reason or ideas you guys have?

 

[roestzwiebel]

Hi,

at first: nice username, I'm eagerly waiting for the final season of BCS

In the Bios are a few settings which I would need to use but those are only available with CSM enabled.

Which settings do you need that require CSM set to enabled?

As far as I know, switching between CSM enabled and disabled is kind of problematic, because usually you have to reinstall Windows after changing this setting. Usually you want it disabled because it's only neccessary if you want to install older OS versions that don't support UEFI. If you installed your Windows with CSM disabled, your partition table is likely in the GPT format (instead of MBR) which can't be used without UEFI support.

I'm kinda surprised you managed to boot into Windows "1 or 2 times" at all, like you said.

 

[GusFring1]

Hi,

at first: nice username, I'm eagerly waiting for the final season of BCS



Which settings do you need that require CSM set to enabled?

As far as I know, switching between CSM enabled and disabled is kind of problematic, because usually you have to reinstall Windows after changing this setting. Usually you want it disabled because it's only neccessary if you want to install older OS versions that don't support UEFI. If you installed your Windows with CSM disabled, your partition table is likely in the GPT format (instead of MBR) which can't be used without UEFI support.

I'm kinda surprised you managed to boot into Windows "1 or 2 times" at all, like you said.

Yes, thats what suprised me as well that I was able to boot once or twice into windows. But gigabyte answered me, the 3000 series nvidia gpus dont support csm anymore same for the 12th gen.

Wouldve been needed for the initial monitor output for my Linux KVM with GPU passthrough. But Linux seems to have as well issues and won't recognize the iGPU yet, guess gotta have to wait since its only 3 weeks on the market