Linux BIOS settings

Setting OS Type

If you Linux on your PC, be it Linux only or together with Windows, do not forget to indicate "Other OS" as the OS type.

Setting Secure Boot

Secure Boot is a security feature designed to prevent malicious software from loading when your PC starts up. If you only run Windows or one of the big Linux distributions, it may be a good idea to set secure boot in the BIOS of your PC.

However, in some cases, like for instance if you use a rescue CD, it may be necessary to disable Secure boot, while performing the rescue process. There are also still some minor Linux distributions that do not support Secure Boot.

Beware that currently (remark July 2024) Secure Boot has been compromised on a lot of Bioses. Therefore, we rather do not trust that technology.

Compatibility Support Module Setting

Should you get an error message like the following upon boot, you have probably set CSM to "UEFI only" while your OS does not support that:

The current BIOS settings do not fully support the boot device.

Click OK to enter the BIOS Setup.
Go to Advanced > Boot > CSM Parameters and adjust the CSM (Compatibility Support Module) settings to enable the boot device.

In that case select "UEFI and Legacy" setting. The exact name may be differ per BIOS.