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After visiting the original Windows 10 on my dual boot laptop after several months, I'm not able to get back into Ubuntu.

I already have Fastboot disabled, and no Shift + Click shutdown or running a shutdown command from the command line won't help me.

It always boots back to Windows.

Petr Doležal
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    I am voting to close this question as a duplicate of [Windows 10 changes UEFI boot order every time](https://askubuntu.com/questions/838780/windows-10-changes-uefi-boot-order-every-time) that you have linked in your answer. – user68186 May 24 '21 at 19:57
  • Does this answer your question? [Can't boot into Ubuntu in Windows 10 / Ubuntu dual boot](https://askubuntu.com/questions/708247/cant-boot-into-ubuntu-in-windows-10-ubuntu-dual-boot) – karel May 25 '21 at 07:38

1 Answers1

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The issue was, that when Windows was loaded (or maybe updated) it switched around the boot order in the UEFI settings.

For a one-time solution, I was able to go follow this guide
How to enter UEFI (BIOS) on Windows 10 PCs | Windows Central
to get to UEFI:

in windows 10
Settings > Update & Security > Recovery > Advanced Startup > Restart now

on blue screens:
Troubleshoot > Advanced options > UEFI Firmware Settings > Restart

This got me to a UEFI menu where I could find out the boot order was switched to:

  1. Windows boot manager
  2. ubuntu

Swapping them around, saving and restarting got me back to where I could select Ubuntu.

For a more permanent solution this answer goes into more detail:
Windows 10 changes UEFI boot order every time - Ask Ubuntu

Petr Doležal
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