Grub is missing Kubuntu?

[Wobbelblob]

30_os-prober

Does it make a difference if it is called 30_os-prober_proxy?

if zorin or bazzite still don't show , there's further steps then

Zorin shows in the konsole, Bazzite doesn't.

[oshunluvr]

I have no idea what the "_proxy" version is about. I use Kubuntu and KDEneon and that entry does not exist for us. You should probably ask in a Zorin or Bazzite forum.

[die.boer]

ok now add bazzite manually to grub: run

sudo find /boot/efi/EFI -name "*.efi"

you should see either /boot/efi/EFI/bazzite/grubx64.efi or /boot/efi/EFI/fedora/grubx64.efi
make note which one
now add custom grub entry with

sudo nano /etc/grub.d/40_custom

and add this at the bottom
menuentry "Bazzite" {
insmod part_gpt
insmod fat
search --file --set=root /EFI/bazzite/grubx64.efi
chainloader /EFI/bazzite/grubx64.efi
}
(if the folder was fedora,replace bazzite with fedora)
save and exit (ctrl+O - enter - ctrl+X)
then again

sudo update-grub

no errors should appear

reboot

[Wobbelblob]

I have no idea what the "_proxy" version is about. I use Kubuntu and KDEneon and that entry does not exist for us. You should probably ask in a Zorin or Bazzite forum.

The problem is that I see that version while being in Kubuntu. I haven't done any steps in Bazzite...

you should see either

Well, I am seeing neither. I see 8 entries, 3 of them being /ubuntu/, 2 being /BOOT/ and 3 being /kubuntu/

[die.boer]

please post output of terminal of this

sudo efibootmgr -v

[Wobbelblob]

BootCurrent: 0003
Timeout: 1 seconds
BootOrder: 0004,0003,0000,0006,0001,0005
Boot0000* Windows Boot Manager  HD(2,GPT,300f4518-6fab-48ea-bb97-df2833bcea17,0xe1800,0x31800)/File(\EFI\MICROSOFT\BOOT\BOOTMGFW.EFI)57494e444f5753000100000088000000780000004200430044004f0042004a004500430054003d007b00390064006500610038003600320063002d0035006300640064002d0034006500370030002d0061006300630031002d006600330032006200330034003400640034003700390035007d00000068000100000010000000040000007fff0400
      dp: 04 01 2a 00 02 00 00 00 00 18 0e 00 00 00 00 00 00 18 03 00 00 00 00 00 18 45 0f 30 ab 6f ea 48 bb 97 df 28 33 bc ea 17 02 02 / 04 04 46 00 5c 00 45 00 46 00 49 00 5c 00 4d 00 49 00 43 00 52 00 4f 00 53 00 4f 00 46 00 54 00 5c 00 42 00 4f 00 4f 00 54 00 5c 00 42 00 4f 00 4f 00 54 00 4d 00 47 00 46 00 57 00 2e 00 45 00 46 00 49 00 00 00 / 7f ff 04 00
    data: 57 49 4e 44 4f 57 53 00 01 00 00 00 88 00 00 00 78 00 00 00 42 00 43 00 44 00 4f 00 42 00 4a 00 45 00 43 00 54 00 3d 00 7b 00 39 00 64 00 65 00 61 00 38 00 36 00 32 00 63 00 2d 00 35 00 63 00 64 00 64 00 2d 00 34 00 65 00 37 00 30 00 2d 00 61 00 63 00 63 00 31 00 2d 00 66 00 33 00 32 00 62 00 33 00 34 00 34 00 64 00 34 00 37 00 39 00 35 00 7d 00 00 00 68 00 01 00 00 00 10 00 00 00 04 00 00 00 7f ff 04 00
Boot0001  Fedora        HD(1,GPT,b111ede1-109a-4f1d-8b1e-5fbc6981488a,0x800,0x12c000)/File(\EFI\FEDORA\SHIMX64.EFI)
      dp: 04 01 2a 00 01 00 00 00 00 08 00 00 00 00 00 00 00 c0 12 00 00 00 00 00 e1 ed 11 b1 9a 10 1d 4f 8b 1e 5f bc 69 81 48 8a 02 02 / 04 04 34 00 5c 00 45 00 46 00 49 00 5c 00 46 00 45 00 44 00 4f 00 52 00 41 00 5c 00 53 00 48 00 49 00 4d 00 58 00 36 00 34 00 2e 00 45 00 46 00 49 00 00 00 / 7f ff 04 00
Boot0003* Kubuntu       HD(1,GPT,bbad975a-3008-439e-a65d-f313718b6c62,0x1000,0x96000)/File(\EFI\KUBUNTU\SHIMX64.EFI)
      dp: 04 01 2a 00 01 00 00 00 00 10 00 00 00 00 00 00 00 60 09 00 00 00 00 00 5a 97 ad bb 08 30 9e 43 a6 5d f3 13 71 8b 6c 62 02 02 / 04 04 36 00 5c 00 45 00 46 00 49 00 5c 00 4b 00 55 00 42 00 55 00 4e 00 54 00 55 00 5c 00 53 00 48 00 49 00 4d 00 58 00 36 00 34 00 2e 00 45 00 46 00 49 00 00 00 / 7f ff 04 00
Boot0004* Fedora        HD(1,GPT,b111ede1-109a-4f1d-8b1e-5fbc6981488a,0x800,0x12c000)/File(\EFI\FEDORA\SHIM.EFI)0000424f
      dp: 04 01 2a 00 01 00 00 00 00 08 00 00 00 00 00 00 00 c0 12 00 00 00 00 00 e1 ed 11 b1 9a 10 1d 4f 8b 1e 5f bc 69 81 48 8a 02 02 / 04 04 2e 00 5c 00 45 00 46 00 49 00 5c 00 46 00 45 00 44 00 4f 00 52 00 41 00 5c 00 53 00 48 00 49 00 4d 00 2e 00 45 00 46 00 49 00 00 00 / 7f ff 04 00
    data: 00 00 42 4f
Boot0005  ubuntu        HD(2,GPT,300f4518-6fab-48ea-bb97-df2833bcea17,0xe1800,0x31800)/File(\EFI\UBUNTU\SHIMX64.EFI)0000424f
      dp: 04 01 2a 00 02 00 00 00 00 18 0e 00 00 00 00 00 00 18 03 00 00 00 00 00 18 45 0f 30 ab 6f ea 48 bb 97 df 28 33 bc ea 17 02 02 / 04 04 34 00 5c 00 45 00 46 00 49 00 5c 00 55 00 42 00 55 00 4e 00 54 00 55 00 5c 00 53 00 48 00 49 00 4d 00 58 00 36 00 34 00 2e 00 45 00 46 00 49 00 00 00 / 7f ff 04 00
    data: 00 00 42 4f
Boot0006* ubuntu        HD(1,GPT,bbad975a-3008-439e-a65d-f313718b6c62,0x1000,0x96000)/File(\EFI\UBUNTU\SHIMX64.EFI)0000424f
      dp: 04 01 2a 00 01 00 00 00 00 10 00 00 00 00 00 00 00 60 09 00 00 00 00 00 5a 97 ad bb 08 30 9e 43 a6 5d f3 13 71 8b 6c 62 02 02 / 04 04 34 00 5c 00 45 00 46 00 49 00 5c 00 55 00 42 00 55 00 4e 00 54 00 55 00 5c 00 53 00 48 00 49 00 4d 00 58 00 36 00 34 00 2e 00 45 00 46 00 49 00 00 00 / 7f ff 04 00
    data: 00 00 42 4f​

[die.boer]

sudo nano /etc/grub.d/40_custom

delete the previous entry you made , and add this instead
menuentry "Bazzite" {
insmod part_gpt
insmod fat
search --no-floppy --set=root --file /EFI/FEDORA/SHIMX64.EFI
chainloader /EFI/FEDORA/SHIMX64.EFI
}
save and exit
rebuild grub with

sudo update-grub

then change boot order with

sudo efibootmgr -o 0003,0004,0000,0006,0001,0005

reboot

PS: if all that works ,we can clean up duplicate EFI entries (you currently have two Fedora and two Ubuntu entries)

[Wobbelblob]

sudo update-grub

After adding said code, that produces the following result with a syntax error:

Sourcing file `/etc/default/grub'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-6.17.0-14-generic
Found initrd image: /boot/initrd.img-6.17.0-14-generic
Found linux image: /boot/vmlinuz-6.17.0-5-generic
Found initrd image: /boot/initrd.img-6.17.0-5-generic
Warning: os-prober will be executed to detect other bootable partitions.
Its output will be used to detect bootable binaries on them and create new boot entries.
Found Windows Boot Manager on /dev/sda2@/efi/Microsoft/Boot/bootmgfw.efi
Found Zorin OS 17.3 (17) on /dev/sdc1
Adding boot menu entry for UEFI Firmware Settings ...
error: syntax error.
error: Incorrect command.
error: syntax error.
error: Incorrect command.
error: syntax error.
Syntax error at line 284
Syntax errors are detected in generated GRUB config file.
Ensure that there are no errors in /etc/default/grub
and /etc/grub.d/* files or please file a bug report with
/boot/grub/grub.cfg.new file attached.

​

[die.boer]

recheck the grub custom file you added

sudo nano /etc/grub.d/40_custom

make sure everything is exactly like this
menuentry "Bazzite" {
insmod part_gpt
insmod fat
search --no-floppy --file --set=root /EFI/FEDORA/SHIMX64.EFI
chainloader /EFI/FEDORA/SHIMX64.EFI
}

save and exit - then

sudo update-grub

and reboot

PS: after the last } sign,press enter,so there's a empty line
if it still doesn't work ,try replacing that entry with
menuentry "Bazzite" {
insmod part_gpt
insmod fat
chainloader /EFI/FEDORA/SHIMX64.EFI
}

save and exit - then

sudo update-grub

and reboot