I can confirm that this bug/issue affected me and with a visible effect. I observed that straightforward minimal Ubuntu 26.04 LTS installations on several VM platforms demonstrated intermittent display of the grub menu with 30-second timeout. There was no sign of an actual boot failure yet the system was reacting like there had been.
Further investigation revealed: - intermittent failure notification during boot on grub2-common or grub-initrd-fallback. Confirmed by monitoring during boot as well as "journalctl -b -0 -p err" output. - when I observed a grub2-common failure I also noted the grub menu was shown for 30 seconds on the next boot. - digging deeper, I confirmed that recordfail=1 in /boot/grub/grubenv (reported by 'grub-editenv list') remained set when the failure was reported. It cleared normally if I unset recordfail manually. Based on an automated test I observed a ~24% average failure (59/249 tests) where grub2-common would fail and recordfail would remain =1. Remediation: Searching Launchpad revealed this issue report and proposed merge. The After dependency for grub-initrd-fallback.service was manually adjusted from unit grub-common.service to unit grub2-common.service. The ~250 reboot test was executed again and zero grub2-common failures were observed. This appears to resolve the behaviour described above. Based on this I feel there I feel there is evidence that grub-initrd- fallback.service depending on the wrong unit could affect up to 1/4 boots of a simple Ubuntu 26.04 LTS system as described above. I am hopeful that, at minimum, this report may help someone else who has also noticed this behaviour and is searching for a similar report. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2156423 Title: Fix grub-initrd-fallback.service order To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/2156423/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
