AMD Motherboards - CSM Disabled = Stuck in/out BIOS

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CSM Disabled = Stuck in/out BIOS

Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=26964
Printed Date: 26 Jul 2025 at 3:50pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: CSM Disabled = Stuck in/out BIOS

Posted By: fck_asrock
Subject: CSM Disabled = Stuck in/out BIOS
Date Posted: 07 Nov 2023 at 6:32pm

Hi,

As the title said, Asrock implementation of CSM is quit broken. I have a balance of issues between landing everytime on the BIOS (the bios image is stretch and no interaction possible) and other times being totally stuck out of the bios the keyboard not registering (CMOS clear allows me back in)

Hardware:
5950X
X570 Taichi
Micron 128g ECC RAM
Crucial NVME SSD w/ Proxmox ZFS
Latest BIOS, latest firmware on everything, no overclock
I have enabled IOMMU, Above 4G, Re-Size BAR, DMAr Support
I have disabled CSM, Fast Boot, DMA Protection, PCIe ARI Support
No overclock on anything

I'm looking for staff that will handle this issue by providing a stable bios firmware. Thanks in advance

Replies:

Posted By: jonas1990
Date Posted: 07 Nov 2023 at 10:38pm

What GPU do you have?

Posted By: fck_asrock
Date Posted: 07 Nov 2023 at 11:07pm

jonas1990 wrote:

What GPU do you have?

RTX 4090 Founders Edition & MSI GT 710 1GD3H LP (for display out on Proxmox when the main gpu is busy only when needed), the bios display is with HDMI on the first x16 slot (4090)

Posted By: jonas1990
Date Posted: 08 Nov 2023 at 12:23am

Check if your OS has UEFI and make sure it works on UEFI.
Maybe the GT710 is only legacy (UEFI-GOP needed btw.).
Try without it.

Posted By: SerchTech
Date Posted: 08 Nov 2023 at 1:42am

If after following jonas1990's good advice the problems persist, try updating your GPU firmware but you will need MS Windows

https://nvidia.custhelp.com/app/answers/detail/a_id/5411/~/nvidia-gpu-uefi-firmware-update-tool" rel="nofollow - https://nvidia.custhelp.com/app/answers/detail/a_id/5411/~/nvidia-gpu-uefi-firmware-update-tool

If after testing without the GT710 everything works correctly, you do not need to update the firmware of your 4090.

-------------
X399 Taichi (4.03)
Threadripper 2950X
DDR4 2 x HX432C16FB3K2/32

Posted By: fck_asrock
Date Posted: 08 Nov 2023 at 2:11am

jonas1990 wrote:

Check if your OS has UEFI and make sure it works on UEFI.
Maybe the GT710 is only legacy (UEFI-GOP needed btw.).
Try without it.

For full transparency this setup worked until 48h hours ago when I wanted to create a clean Proxmox setup, the setup with the exact hardware was running 24/7 for a month I since CSM was disabled I was not able to access the bios without a cmos clear but it did totally work and boot.

I will still try the unplug one of the gpu respectively and report the results, meanwhile a look at the bios firmware to fix this recurrent issue would be really appreciated if anyone from the staff is reading

Example of similar issue:
- https://forum.asrock.com/forum_posts.asp?TID=22356&title=disabling-csm-causes-stuck-boot-to-bios" rel="nofollow - https://forum.asrock.com/forum_posts.asp?TID=22356&title=disabling-csm-causes-stuck-boot-to-bios
- https://forum.asrock.com/forum_posts.asp?TID=25868&PID=104771&title=cant-boot-bios-after-disabling-csm-to#104771" rel="nofollow - https://forum.asrock.com/forum_posts.asp?TID=25868&PID=104771&title=cant-boot-bios-after-disabling-csm-to#104771