Trying to dual boot with preexisting Windows. After installation it boots straight to Windows, Endevour os has no boot entry in Bios

[Qtamo]

Hey!
I’m trying to dual boot with preexisting Windows.
I shrank the Windows C: partition with the Windows disk manager to free up some space. The I installed Endevour os onto that free space with the “replace a partition” option. The installation happened without errors.

After installation I couldn’t boot into Linux, and I didn’t find a boot entry for it in the Bios. I found this advice on a reddit post:

“When you were installing endeavour os you have to select an efi partition too to install bootloader.”

Ok, I didn’t do that, so maybe that is the issue? But I didn’t find an option in Calamares to choose where to install the Bootloader. So how do I make sure the bootloader installs in the existing Efi partition? Or do I create a separate Efi partition for it? Or maybe my problem is due to something else?

Thank you!

[thefrog]

can you share the contents of your install log?

[Qtamo]

I’m no longer in the live environment, but I will reinstall it and share the logs if the same problem persists. Unless there is a way to access the logs without booting to Linux? Also my machine is Thinkpad T14 Gen 1 (AMD CPU) if that’s relevant

[thefrog]

Boot with a live usb and navigate to the installed system.

On the installed system go to /var/logs open a terminal and type this in

cat /var/logs/endeavour-install.log | eos-sendlog

get the url of the above command and post it here for us to see what is going on.

[Qtamo]

Thanks! Heres the logs https://0x0.st/X5EN.txt

[thefrog]

It looks like you choose to use systemd-boot as the bootloader

your efi partition is only 260M and I think you need at least 1.G for eos.

@joekamprad @dalto to confirm

It also doesn’t look like it wrote a bootloader and only overwrote /nvme0n1p5 which is the root partition.

[Qtamo]

Ok! That makes sense. Indeed I selected Systemd-boot.

So the default efi partition is too small and a bootloader probably wasn’t created due to a lack of space? Do you think Grub would fit or would that have the same issue? If I decided to erase the disk and install Endevour os, would the Efi partition be resized/replaced, or would I run into the same issue?

Thanks for all the help!

[Qtamo]

So I ended up wiping Windows and installing Endevour os. I’m going travelling in a few hours and decided I wanted a working Linux system and I’m fine with trying to reinstall Windows later. It seems to work well.

I’ll mark @thefrog previous answer as a solution, and forum admins can re-mark it if another solution turns out better.

Hopefully this will help some others with the same issue. Thank you @thefrog for the help and hope you have a great day!