[SOLVED] Can't enable compatibility support module on an Asus B560 Prime Plus

[ShaQBlogs]

Just got my new mobo based on multiple suggestions in this forum - Asus B560 Prime Plus

I'm trying to enable compatibility support module in BIOS so I can boot from a MBR partitioned drive. But the "Launch CSM" option is always greyed out. The secure boot shows as either User or Custom. Secure boot does not show as disabled.

Here is what I have tried

• Choose "Other OS" under "OS Type"
• Delete all secure boot keys
• Disabled fast boot

Launch CSM option is always greyed out.

Need some expert advice. I have spent last two days trying to figure this out, searching online. 🙂

 

[Koekieezz]

Just got my new mobo based on multiple suggestions in this forum - Asus B560 Prime Plus

I'm trying to enable compatibility support module in BIOS so I can boot from a MBR partitioned drive. But the "Launch CSM" option is always greyed out. The secure boot shows as either User or Custom. Secure boot does not show as disabled.

Here is what I have tried

• Choose "Other OS" under "OS Type"
• Delete all secure boot keys
• Disabled fast boot

Launch CSM option is always greyed out.

Need some expert advice. I have spent last two days trying to figure this out, searching online. 🙂

try to disable intel platform trust technology and see if the option is available.

Also try to use an older gpu or any gpu if you have one, disable the igpu if your cpu have igpu, save and exit, enter bios again, and see if the option isn't greyed out.

 

[ShaQBlogs]

TPM device selection has two options,

1. Enable firmware TPM
2. Enable device TPM

I do not have TPM added. Tried to select option 2,but it defaults back to 1 on save - restart.

How do I disable it?

 

[Koekieezz]

TPM device selection has two options,

1. Enable firmware TPM
2. Enable device TPM

I do not have TPM added. Tried to select option 2,but it defaults back to 1 on save - restart.

How do I disable it?

Seems you cant disable firmware TPM? hmm, did you use an iGPU only?

 

[ShaQBlogs]

Yes, integrated graphics

 

[Koekieezz]

Yes, integrated graphics

that is probably the cause, the iGPU vbios doesn't support CSM. Try to use a dedicated one (any pcie gpu) and disable the iGPU. you should have the CSM option enabled if you done thhat.

 

[ShaQBlogs]

I have an NVIDIA NVS 310. Display port card
Will that work?

Are there other mobos for the 11400 that supports this with iGPU?

I got this mobo for the iGPU. Neeed one HDMI and one DP

 

[Koekieezz]

Will that work?

maybe, give it a shot.

 

[ShaQBlogs]

Tried it out, and the option got enabled finally.
Thanks for that. I was going nuts with this.

Now the mouse / keyboard does not work during installation. I think I might need to get hold of a PS2 mouse to enable the installation