Hi, kay <kay.d...@gmail.com> (2016-03-07): > Package: os-prober > Version: 1.71 > > Also reproducible in os-prober 1.65 > > https://anonscm.debian.org/cgit/d-i/os-prober.git/tree/os-probes/mounted/x86/05efi#n42..n45 > > Disk has regular MBR table. It has Windows 7 and Ubuntu installed on > different partitions. Os-prober doesn't detect EFI partition on MBR > table because "udevadm info" returns "dos" partition scheme instead of > expected "msdos". > > $ udevadm info /dev/sda1 | grep dos > E: ID_PART_ENTRY_SCHEME=dos > E: ID_PART_TABLE_TYPE=dos > > $ fdisk -lu /dev/sda | grep -B1 -A1 ef > Device Boot Start End Blocks Id System > /dev/sda1 * 2048 616447 307200 ef EFI (FAT-12/16/32) > /dev/sda2 616448 128134439 63758996 7 HPFS/NTFS/exFAT > > Fixing conditions below resolves the issue: > > - \( "$ID_PART_ENTRY_SCHEME" != gpt -a "$ID_PART_ENTRY_SCHEME" != msdos \) -o > \ > + \( "$ID_PART_ENTRY_SCHEME" != gpt -a "$ID_PART_ENTRY_SCHEME" != dos \) -o \ > \( "$ID_PART_ENTRY_SCHEME" = gpt -a "$ID_PART_ENTRY_TYPE" != > c12a7328-f81f-11d2-ba4b-00a0c93ec93b \) -o \ > - \( "$ID_PART_ENTRY_SCHEME" = msdos -a "$ID_PART_ENTRY_TYPE" != 0xef \) ]; > then > + \( "$ID_PART_ENTRY_SCHEME" = dos -a "$ID_PART_ENTRY_TYPE" != 0xef \) ]; then > > Probably this bug relates to udevinfo replacement > (https://lists.debian.org/debian-user/2010/07/msg01134.html). > > P.S. Cross-posting report in ubuntu launchpad > https://bugs.launchpad.net/ubuntu/+source/os-prober/+bug/1553678
So I've tracked this to udev in systemd.git calling blkid functions to get the partition type, and to libblkid/src/partitions/dos.c in util-linux.git; it doesn't seem to have been called msdos previously, so I think the proposed change looks good. This needs to be backported to jessie and stretch AFAICT. Cc-ing Steve since this involves EFI though, to have another pair of eyes go over this. KiBi.
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