Bug 427614 - Reboot to GRUB2 command line after upgrading to Ubuntu 20.04 LTS
Summary: Reboot to GRUB2 command line after upgrading to Ubuntu 20.04 LTS
Status: RESOLVED WAITINGFORINFO
Alias: None
Product: neon
Classification: KDE Neon
Component: general (other bugs)
Version First Reported In: unspecified
Platform: Ubuntu Linux
: NOR major
Target Milestone: ---
Assignee: Neon Bugs
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2020-10-13 02:49 UTC by Mark Calabretta
Modified: 2025-09-20 09:35 UTC (History)
4 users (show)

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Version Fixed/Implemented In:
Sentry Crash Report:

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Description Mark Calabretta 2020-10-13 02:49:13 UTC 
SUMMARY

After upgrading to Ubuntu 20.04 LTS, reboot goes to the GRUB2 command line with no indication of why the boot failed.

STEPS TO REPRODUCE
1. Upgrade from Neon User Edition 5.19 to Ubuntu 20.04 LTS using the instructions provided at https://community.kde.org/Neon/FocalUpgrades
2. Reboot (as normal part of the upgrade).

OBSERVED RESULT

Reboot fails, dropping back to GRUB2 command line.


EXPECTED RESULT

Normal reboot.


SOFTWARE/OS VERSIONS
Linux: 5.4.0-48-generic
KDE Plasma Version: 5.19.5
KDE Frameworks Version: 5.75,0
Qt Version: 5.15.0

ADDITIONAL INFORMATION

Architecture: x86_64
Dell Latitude E6530.

GRUB2 package versions (from dpkg -l):
grub-efi              2.04-1ubuntu26.4
grub-efi-amd64        2.04-1ubuntu26.4
grub-efi-amd64-bin    2.04-1ubuntu26.4
grub-efi-amd64-signed 1.142.6+2.04-1ubuntu26.4

At the GRUB command line, 'echo $prefix' reports /EFI/ubuntu.
Running 'strings -a' on /boot/efi/EFI/BOOT/BOOTX64.EFI confirms that this string is hardcoded into the executable.  Likewise, for /boot/efi/EFI/neon/grubx64.efi. Both are copies of /usr/lib/grub/x86_64-efi-signed/grubx64.efi.signed from the grub-efi-amd64-signed package.

The /EFI/ubuntu directory does not exist, instead replaced by /EFI/neon.

Re-running 'grub-install' did not fix the problem.

At the GRUB command line, the following effected the boot:
  set prefix=($root)'/EFI/neon'
  configfile $prefix/grub.cfg

I have implemented a workaround by creating /boot/efi/EFI/ubuntu/ and copying over grub.cfg and grubx64.efi from /boot/efi/EFI/neon/.
Comment 1 Husam 2022-11-12 10:53:08 UTC 
I have recently downloaded KDE neon 5.26 and Face the same exact bug. Prefix is set to /efi/ubuntu instead of ../neon.

Using update-grub then grub-install does not fix the problem. I also tried using the boot-repair utility.

I hope this gets prioritized because it seems to be easily fixable.
Comment 2 Carlos De Maine 2025-09-20 09:35:25 UTC 
Thank you for your bug report! 
However this bug report was created/provided previous to 01/01/2023 and also has not received any updates since  before 01/01/2025. 
Unfortunately KDE neon no longer provides updates for anything older than noble 24.04 based edition's.
Please upgrade to KDE neon noble and if you can reproduce the issue after upgrading to an active version, feel free to re-open this bug report.
Thanks for understanding!