1. Running grub-probe --device /dev/mapper/myvg-myvol fails (that's THE reason for grub-pc postinstall to fail), while grub-probe --device /dev/myvg/myvol succeeds (returns "ext2"). I wouldn't expect different behavior on a symlink device..
2. The failure shows up in disk/lvm.c grub_lvm_read(). It seems to successfully read the LVM entities (Logical Volume, Volume Group), but pv- >disk is NULL, in the failed cases, for some reason. Didn't figure out why, yet, but maybe it'll give a hint to someone.. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org