Hello,

I installed xubuntu on a desktop computer with the ASUS UEFI BIOS utility. The problem is that GRUB does not show up at start and i have to boot linux (or windows) by clicking on the bios boot list directly.

Should i disable smart boot in the bios?

regards,
Jamasoo

Is whatever version of xubuntu (??) you have installed booting in UEFI mode, is it installed UEFI and in the BIOS firmware under Boot Options, do you see an xubuntu/ubuntu entry? Is whatever version of windows also installed in UEFI mode? If you want to boot with the Xubuntu Grub and both Xubuntu and windows are UEFI, set the Xubuntu/ubuntu entry first in boot priority in the BIOS firmware.

If the above steps don't help, I would suggest you go to the Ubuntu site at the link below and download and run boot repair while booted into your Xubuntu. THere are a number of possible problems and a lot more information would be needed and you can get that from boot repair. When you run it, do NOT try to make any repairs but select the option to Create BootInfo Summary and download using the 2nd option described on the page, using the ppa as it is more current. When boot repair finishes, you will get a link you can post here for members to view and assist.

https://help.ubuntu.com/community/Boot-Repair

If you did do or try to do an EFI dual boot, the Introduction and General Principles section at the link below might be useful reading

https://help.ubuntu.com/community/UEFI

1 members found this post helpful.

Thanks for your quick reply.

Answering your questions:

The version is XUBUNTU 18.04 LTS
I do not know what booting in UEFI mode means yet (sorry)
I can see two ubuntu entries in the boot list
Do not know whether windows is in UEFI mode
I tried to set ubuntu in order to boot first, but it did not work.

Since you spoke about EFI dual boot, i will attach the partition table layout.

I will look into what you propose (regarding boot repair)and post the results here.

I would like to ask if one installs linux by completely erasing the hard disk, would it then boot without problems?

regards,
Jamaso

Attached Thumbnails

 

UEFI chips have a native mode (which you need for booting Windows) and a legacy mode in which they imitate an old-fashioned BIOS. Major distros like Ubuntu can install and boot in native mode and can even cope with UEFI's secure boot requirement. For other distros, you may need to turn secure boot off but you can still install and boot them in UEFI native mode. And finally there are a lot of minor distros that need to be installed in legacy mode.

I don't know what you mean by Smart Boot, but if it is the same as Fast Boot, then it needs to be turned off. This is a way of speeding up Windows boot by hibernating rather than shutting down fully, but it isn't compatible with Linux.

1 members found this post helpful.

The image you posted in post 3 above shows that you have an EFI partition which means an EFI install, the default for windows 10. It does not tell use if windows and/or Xubuntu are both EFI which the boot repair script would. If you shut down the computer and do a cold boot without accessing the BIOS firmware, does the cxomputer boot and if so, what does it boot, windows or Xubuntu?

Detailed explanation of UEFI on ubuntu derivatives is at the 2nd link in my first post above.

1 members found this post helpful.

I think that ubuntu's won't show grub by default. Put a linux usb flash drive in and it should then show grub.

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open a terminal and post the output of the following
If it says it is a directory your booting in efi mode.

If it says "No such file or directory"
your booting xubuntu in csm/legacy mode and hence cause of your problem.

1 members found this post helpful.

There is no bios-boot partition, so your most likley booting in efi mode
Ifproduces "cat: /sys/firmware/efi: Is a directory" will confirm it.
you may be able to go into bios settings and change boot order to put ubuntu as first boot.

1 members found this post helpful.

@ colorpurple21859

dna@dna-System-Product-Name:~$ cat /sys/firmware/efi
cat: /sys/firmware/efi: Is a directory

dna@dna-System-Product-Name:~$ efibootmgr
BootCurrent: 0004
Timeout: 0 seconds
BootOrder: 0004,0005,0000,0001,0002
Boot0000* Windows Boot Manager
Boot0001* Hard Drive
Boot0002* CD/DVD Drive
Boot0004* ubuntu
Boot0005* ubuntu

Thank you for the information. I guess i misinformed you at first, because GRUB does show only when i click on the ubuntu boot option in the boot list (within the BIOS).

Change the default to Ubuntu.

To change bootorder with efibootmgr

https://www.linuxbabe.com/command-li...otmgr-examples
https://linux.die.net/man/8/efibootmgr

sometimes this dosent' work and will have to do it from bios setting.

While we are at it on sudo efibootmgr be sure to try that command alone to see what you have. Some odd boards seem to add in entry after entry till it locks up.

It's quite easy to change on Asus in bios F2 then arrow across till you get to boot options, then one arrow down click enter select which one you want click enter then save finished.

Dennis

Thanks for all the help, i really appreciated. But i just reinstalled Xubuntu as my sole OS. No more dual boot. Works great!

How to Install Xubuntu 18.04.2 LTS UEFI Mode (2019)

https://www.youtube.com/watch?v=wmqL81w20KE