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BlandCorporation
Asked: 2019-08-22 17:19:46 +0800 CST

How can Legacy Boot be enabled on a 2019 ThinkPad?

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I have a 2019 ThinkPad X390 with Windows 10 and want to install Ubuntu. I have always used Legacy Boot previously, not UEFI, and want to see how to have that option. In the UEFI-BIOS, I can see that the option to change UEFI/Legacy Boot from UEFI Only to `Legacy Only' is not selectable and beside it is written the text

Unselectable for Kernel DMA Protection

How can the option to change this be enabled?

windows dual-boot thinkpad uefi csm

1 Answers

  1. I had same Problem on my Lenovo t490. I just went under the tab Security and the Virtualization, there was the option Kernel DMA Protection, and I switched it off. Now I'm able to switch legacy mode on.

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