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How to boot from different sda (partition) on lenovo thinkpad x260?

se flag

I installed kubuntu with disk encryption on sda2 and Ubuntu without disk encryption on sda. now it seems that I can only boot Ubuntu, because when I click F12 on boot, it only gives me options of different drives, not different partitions (sda).

How can I boot with sda2 (which is encrypted)?

I tried googling it, but can't find the correct BIOS option for lenovo thinkpad x260. Most results are related to dual booting windows and linux, not linux twice.

oldfred avatar
cn flag
UEFI or BIOS. But either way you only have one grub/Ubuntu boot either in ESP as /EFI/Ubuntu or in MBR if BIOS boot. And then grub will offer to boot other installs. But if second install which has become default boot, does not use LVM & encryption, the `sudo update-grub` will not find the encrypted install as you need drivers. To get Ubuntu to see different encrypted install: `sudo apt-get update && sudo apt-get install lvm2 cryptsetup` Then mount the encrypted install & run `sudo update-grub`
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