Public bug reported:
Successfully upgraded to vivid. During an update to the kernel the
system regenerated the grub menu which ignored the root partition on my
SSD.
Output from parted -l
Model: ATA OCZ-AGILITY3 (scsi)
Disk /dev/sda: 60.0GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:
Number Start End Size Type File system Flags
1 1049kB 368MB 367MB primary ntfs boot
2 369MB 60.0GB 59.7GB extended
5 369MB 60.0GB 59.7GB logical ext4
Model: ATA WDC WD15EADS-00R (scsi)
Disk /dev/sdb: 1500GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:
Number Start End Size Type File system Flags
1 32.3kB 632GB 632GB primary ntfs
4 632GB 1496GB 864GB primary ext4
3 1496GB 1500GB 4721MB primary linux-swap(v1)
update-grub correctly identifies the partitions on:
sdb1
sdb4
It ignores the partition on
sda5
Thus the default kubuntu which boots is the one on sdb4 which is an
older copy of kubuntu 13.10 rather than the later 15.04 on sda5.
Interestingly running update-grub on the old copy of Kubuntu correctly
generates a grub.cfg with an entry for sda5.
For this reason I believe this is a late change to the grub code base
which is causing this defect.
This is a section of dmesg relating to the drives.
dmesg | grep sd
[ 19.434247] sd 2:0:0:0: [sda] 117231408 512-byte logical blocks: (60.0
GB/55.8 GiB)
[ 19.434287] sd 2:0:0:0: [sda] Write Protect is off
[ 19.434290] sd 2:0:0:0: [sda] Mode Sense: 00 3a 00 00
[ 19.434302] sd 2:0:0:0: Attached scsi generic sg0 type 0
[ 19.434303] sd 2:0:0:0: [sda] Write cache: enabled, read cache: enabled,
doesn't support DPO or FUA
[ 19.434632] sd 3:0:0:0: [sdb] 2930275055 512-byte logical blocks: (1.50
TB/1.36 TiB)
[ 19.434665] sd 3:0:0:0: Attached scsi generic sg1 type 0
[ 19.434702] sd 3:0:0:0: [sdb] Write Protect is off
[ 19.434705] sd 3:0:0:0: [sdb] Mode Sense: 00 3a 00 00
[ 19.434736] sd 3:0:0:0: [sdb] Write cache: enabled, read cache: enabled,
doesn't support DPO or FUA
[ 19.434877] sda: sda1 sda2 < sda5 >
[ 19.435134] sd 2:0:0:0: [sda] Attached SCSI disk
[ 19.480834] sdb: sdb1 sdb3 sdb4
[ 19.481269] sd 3:0:0:0: [sdb] Attached SCSI disk
[ 20.906552] EXT4-fs (sda5): mounted filesystem with ordered data mode. Opts:
(null)
[ 21.872733] Adding 4610648k swap on /dev/sdb3. Priority:-1 extents:1
across:4610648k FS
[ 22.096519] EXT4-fs (sda5): re-mounted. Opts: errors=remount-ro
[ 22.270531] EXT4-fs (sdb4): mounted filesystem with ordered data mode. Opts:
(null)
The sda drive is a SSD and the sdb drive is a standard hard disk drive.
Output from update-grub, note the missing sda5 entry.
root@Office:/boot/grub# update-grub
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-3.19.0-26-generic
Found initrd image: /boot/initrd.img-3.19.0-26-generic
Found linux image: /boot/vmlinuz-3.19.0-25-generic
Found initrd image: /boot/initrd.img-3.19.0-25-generic
Found memtest86+ image: /boot/memtest86+.elf
Found memtest86+ image: /boot/memtest86+.bin
Found Windows 8 (loader) on /dev/sda1
Found Microsoft Windows XP Professional on /dev/sdb1
Found Ubuntu 13.10 (13.10) on /dev/sdb4
done
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: grub-pc 2.02~beta2-22ubuntu1.1
ProcVersionSignature: Ubuntu 3.19.0-26.28-generic 3.19.8-ckt4
Uname: Linux 3.19.0-26-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.17.2-0ubuntu1.3
Architecture: amd64
CurrentDesktop: KDE
Date: Wed Sep 9 13:07:04 2015
InstallationDate: Installed on 2014-03-23 (534 days ago)
InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
SourcePackage: grub2
UpgradeStatus: Upgraded to vivid on 2015-08-10 (29 days ago)
** Affects: grub2 (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug vivid
** Attachment added: "Faulty grub.cfg file."
https://bugs.launchpad.net/bugs/1493615/+attachment/4459513/+files/grub.cfg
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https://bugs.launchpad.net/bugs/1493615
Title:
update-grub ignores linux partition
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