As a workaround I have written a new update-grub which corrects this bug:
root@fextest01:~# type -a update-grub update-grub is /usr/local/sbin/update-grub update-grub is /usr/sbin/update-grub root@fextest01:~# update-grub /usr/local/sbin/update-grub: workaround for https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/508901 Sourcing file `/etc/default/grub' Generating grub configuration file ... Found linux image: /boot/vmlinuz-6.8.0-57-generic Found initrd image: /boot/initrd.img-6.8.0-57-generic Found linux image: /boot/vmlinuz-6.8.0-56-generic Found initrd image: /boot/initrd.img-6.8.0-56-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 Ubuntu 24.04.2 LTS (24.04) on /dev/mapper/ubuntu--vg-ubuntu--lv Adding boot menu entry for UEFI Firmware Settings ... done /boot/grub/grub.cfg contains now the correct root= parameter ** Attachment added: "update-grub" https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/508901/+attachment/5869622/+files/update-grub -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/508901 Title: update-grub sets wrong root argument To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/508901/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
