Kubuntu EFI folder.

[Rich Oliver]

In Kubuntu 25.10 the EFI data seems to be stored in a "kubuntu" folder. Kubuntu used to store its EFI data in an "ubuntu" folder. I wondered if anyone knew when that change happened.

[claydoh]

What path are you looking at?

[jlittle]

I have a tiny PC with a mostly vanilla 25.10 install, and the EFI folder is "ubuntu". If yours is indeed "kubuntu", I wonder how you achieved that.

What counts though, is the boot entry revealed by

sudo efibootmgr

Note that even if one uses efibootmgr to set a different directory, the path /EFI/ubuntu is coded inside the grubx64.efi executable.

[Rich Oliver]

I have a tiny PC with a mostly vanilla 25.10 install, and the EFI folder is "ubuntu". If yours is indeed "kubuntu", I wonder how you achieved that.

I'm wondering that now myself. That was on my desktop. I didn't think to check my laptop. Checking efibootmgr on my laptop, Kubuntu 25.10 is indeed using the "ubuntu" folder. I multi-boot multiple Linux distros plus a windows install on desktop and laptop. I only discovered it, because I'd just installed CachyOS on my desktop for the first time and the OS finder for grub is switched off by default on CachyOS, so I used efibootmgr to go back to my previous grub menu. But my desktop now definitively seems to be using a grub from the EFI/Kubuntu folder not the EFI/ubuntu folder.

So the only thing I can think is this. One of the first things I do after a Kubuntu install is go in and change /etc/default/grub and /etc/lsb-release and then update grub. I change any reference to "Ubuntu" to "Kubuntu" and then update-grub. So maybe what happened is that I installed another version of Kubuntu alongside 25.10, which would wipe out and replace the 25.10 grub. Then at some point I reinstalled the grub on 25.10 and on the reinstall it put it in the EFI/kubuntu folder leaving the other grub undeleted in the EFI/ubuntu folder.

[kc1di]

It's ubuntu on mine also. Not sure what changed yours. But as long as it works I wouldn't worry too much about it.

[claydoh]

Again, what is the full path to this directory while running Kubuntu?
The boot files have always been ubuntu and still are. Editing the contents in /etc/default/grub does not change any directory name or mount point.

What does efibootmgr actually show ?

Show us exactly what you see so we can be sure we are all on the same page. Especially as I myself tend to be in Lala land, and likely to be lost



I wonder if this is a drive or device name or label, not a physical directory. More so if you only see this from a different distro.

For example, the installer set my "/" (root) as "kubuntu_25.10":



If you click into the address bar, it should show the actual path, as seen in my first screenshot.


.

[Rich Oliver]

Again, what is the full path to this directory while running Kubuntu?
The boot files have always been ubuntu and still are. Editing the contents in /etc/default/grub does not change any directory name or mount point.

What does efibootmgr actually show ?

Sorry I've only just got back on my desktop, I was posting from laptop.

BootCurrent: 000C
Timeout: 1 seconds
BootOrder: 000C,0002,000D,0000,000E
Boot0000* Windows Boot Manager  HD(2,GPT,6887665d-8afc-4af1-9644-4f2727001055,0x109000,0x31800)/File(\EFI\MICROSOFT\BOOT\BOOTMGFW.EFI)57494e444f5753000100000088000000780000004200430044004f0042004a004500430054003d007b00390064006500610038003600320063002d0035006300640064002d0034006500370030002d0061006300630031002d006600330032006200330034003400640034003700390035007d00000074000100000010000000040000007fff0400
Boot0002* cachyos       HD(1,GPT,5ed3ce8b-58ba-4e19-a586-e719bd8d8d41,0x800,0x186000)/File(\EFI\CACHYOS\GRUBX64.EFI)
Boot000C* Kubuntu       HD(1,GPT,5ed3ce8b-58ba-4e19-a586-e719bd8d8d41,0x800,0x186000)/File(\EFI\UBUNTU\SHIMX64.EFI)
Boot000D* ubuntu        HD(2,GPT,6887665d-8afc-4af1-9644-4f2727001055,0x109000,0x31800)/File(\EFI\UBUNTU\SHIMX64.EFI)0000424f
Boot000E* debian        HD(2,GPT,6887665d-8afc-4af1-9644-4f2727001055,0x109000,0x31800)/File(\EFI\DEBIAN\GRUBX64.EFI)0000424f

So you are right there is no EFI/Kubuntu folder. I saw the entry labeled as "kubuntu" and just presumed that it must be in a EFI/kubuntu folder, because before Linux grub data had always been in folder with the same name as the efibootmgr label. Apologies for spreading FUD.

[jlittle]

I multi-boot multiple Linux distros plus a windows install on desktop and laptop.

IMO if you do that it's far more reliable to manually maintain an independent grub install and turn off the update-grub machinery where possible.