grub-installer is verified OK on trusty-proposed; tags changed. The install on a multipath device correctly uses the 'p' partition separator, and chooses the mpath disk, rather than any underlying disk (which actually show up before in the introduced prep_bootdev -l command).
~ # /usr/lib/grub-installer/prep-bootdev -l /dev/sda1 /dev/mapper/mpath10p1 /dev/sdz1 ~ # grep grub-install.*success /var/log/syslog Jul 27 16:07:28 grub-installer: info: grub-install ran successfully ~ # grep grub-install /var/log/syslog Jul 27 15:46:27 anna[3639]: DEBUG: retrieving grub-installer 1.78ubuntu20.2 Jul 27 15:46:29 anna[3639]: 2015-07-27 15:46:29 URL:http://ports.ubuntu.com/ubuntu-ports//pool/main/g/grub-installer/grub-installer_1.78ubuntu20.2_ppc64el.udeb [198958/198958] -> "/var/cache/anna/grub-installer_1.78ubuntu20.2_ppc64el.udeb" [1] Jul 27 16:07:16 main-menu[2024]: INFO: Menu item 'grub-installer' selected Jul 27 16:07:16 grub-installer: info: architecture: ppc64el/chrp_ibm Jul 27 16:07:16 grub-installer: info: Mounting /proc into /target Jul 27 16:07:20 grub-installer: info: Identified partition label for /dev/mapper/mpath0p2: unknown Jul 27 16:07:21 grub-installer: info: Wiping PReP partition /dev/mapper/mpath0p1 Jul 27 16:07:27 grub-installer: info: Installing grub on '/dev/mapper/mpath0p1' Jul 27 16:07:27 grub-installer: info: grub-install does not support --no-floppy Jul 27 16:07:27 grub-installer: info: Wiping PReP partition /dev/mapper/mpath0p1 Jul 27 16:07:27 grub-installer: info: Running chroot /target grub-install --force "/dev/mapper/mpath0p1" Jul 27 16:07:27 grub-installer: Installing for powerpc-ieee1275 platform. Jul 27 16:07:28 grub-installer: Installation finished. No error reported. Jul 27 16:07:28 grub-installer: info: grub-install ran successfully ** Tags removed: verification-needed ** Tags added: verification-done -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1415918 Title: ISST-LTE: Ubuntu15.04: Boot loader installation is failing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1415918/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs