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rated 0 times [  1] [ 0]  / answers: 1 / hits: 538  / 2 Years ago, sun, september 11, 2022, 11:24:47

I have recently bought a ThinkPad E14 Gen 4 with an Intel 1260P, and am trying to dual boot Ubuntu 22.04 LTS alongside Windows.


My laptop came with Windows 11 Pro preinstalled and I have not messed with that or my UEFI settings. I flashed the image (from Canonical's website) to a USB drive using Rufus, and attempted booting to it. However, when I select the USB drive in the boot menu, nothing happens - once I exit the boot menu, the laptop just boots back to Windows.


How do I proceed?


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TL;DR Go into your BIOS using the F1 key. Then go to Security > Secure Boot > toggle Allow Microsoft 3rd party UEFI CA to be on. Save and exit (F10), and then use F12 to boot to the Ubuntu install media.



I found the source of the problem. It was Secure Boot, though that initially confused me because Ubuntu is supposed to support secure boot.


Well, I found this strange option in the BIOS/UEFI and decided to investigate: Allow Microsoft 3rd party UEFI CA. Turns out that Lenovo had published a document advising about this change, mandated by Microsoft: https://download.lenovo.com/pccbbs/mobiles_pdf/Enable_Secure_Boot_for_Linux_Secured-core_PCs.pdf


Enabling that setting allowed me to boot to the Ubuntu installer.


[#88] Tuesday, September 13, 2022, 2 Years  [reply] [flag answer]
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