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Confusion about dual-booting Ubuntu and Windows 8. CSM or UEFI?

rated 0 times [ 1] [ 0] / answers: 1 / hits: 2068 / 3 Years ago, wed, august 25, 2021, 5:05:49

As far as I have heard, dual booting (Ubuntu and Windows) in UEFI isn't very clean, and hence people prefer CSM when doing so. But, in case my laptop has Windows pre-installed in UEFI, I need to reinstall it to get it in CSM.

Now, my laptop's boot menu has an option of UEFI and CSM. What could this option mean? Does it mean I can dual boot without any hassles?

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2 Years ago

answered 3 Years ago hical · Accepted Answer

Each firmware can be different, but generally this option means that your firmware will first try to boot in UEFI mode (it will search for .efi files corresponding to your UEFI entries), then if it fails to boot in UEFI mode it will try to boot in Legacy mode.