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Trying to install Ubuntu 20.04 along side Win10 in Legacy mode, getting "no efi system partition was found" error

rated 0 times [ 3] [ 0] / answers: 1 / hits: 1575 / 1 Year ago, wed, november 23, 2022, 6:04:59

Basically what the title says. I have chosen the "something else" option since for some reason windows 10 wasn't being detected. I created a root partition, swap partition, home partition and I even tried to create a /boot partition (didn't work neither with nor without it).

The problem is that after I click "Install", I get "no EFI system partition was found. etc". The thing is, I want to use Legacy mode, not UEFI, since Windows is in Legacy. Am I doing something wrong? I tried to look on google, but I couldn't really find something for this specific problem. I found how to install in UEFI mode when this error occurs, I found how to install in Legacy mode but this error wasn't occurring in the articles that I looked at.

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calcur

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answered 1 Year ago umplegitimat · Accepted Answer

This can happen if you boot the installer in UEFI mode and want to install. Then the installer wants to install Ubuntu in UEFI mode as well and requires that the partition table of the target device is in GPT format and has an ESP partition.

Check in your BIOS how you boot from the installer device. You don't want to boot the installer in UEFI mode but in Legacy mode. Sometimes the options to boot in UEFI mode have UEFI in the boot entry, e.g. at the end, and the legacy option doesn't.