[Bug 554307] Re: linux-boot-prober yields wrong uuid for kernel root parameter

[Phillip Susi]

I see now.  So os-prober detects an install on another partition,
decides to try and boot it with some kernel, but passes the wrong root
argument.  That does seem wrong.


** Changed in: os-prober (Ubuntu)
       Status: Won't Fix => Triaged

** Description changed:

- Binary package hint: os-prober
+ When os-prober detects another install on a system with a shared /boot,
+ it sets up a menu to boot that install, but passes the kernel a root=
+ argument directing it to mount the root partition of the install running
+ os-prober instead of the partition on which the other system was found.
+ Example:
  
- My Partitions:
- sda5 swap
- sda6 lucid
- sda7 karmic
- 
- linux-boot-prober doesn't take the root partition as kernel root
- paraameter for my karmic installation.
- 
- matthias at netbook:/boot/grub$ ls -l /dev/disk/by-uuid/
- insgesamt 0
- lrwxrwxrwx 1 root root 10 2010-04-02 23:08 199233d9-7174-445d-81df-eb9c95af871f -> ../../sda7
- lrwxrwxrwx 1 root root 10 2010-04-02 23:08 1E4F-1E00 -> ../../sda2
- lrwxrwxrwx 1 root root 10 2010-04-02 23:08 523cd06e-f460-4c88-b1e9-5382df4e5d37 -> ../../sda6
- lrwxrwxrwx 1 root root 10 2010-04-02 23:08 82A8C040A8C03507 -> ../../sda1
- lrwxrwxrwx 1 root root 10 2010-04-02 23:08 837c2ad3-a209-4668-b864-a79320c5094b -> ../../sda5
- 
- matthias at netbook:/boot/grub$ linux-boot-prober /dev/disk/by-uuid/199233d9-7174-445d-81df-eb9c95af871f
- unshare failed: Operation not permitted
- /dev/disk/by-uuid/199233d9-7174-445d-81df-eb9c95af871f:/dev/disk/by-uuid/199233d9-7174-445d-81df-eb9c95af871f:Ubuntu, Linux 2.6.31-16-generic:/boot/vmlinuz-2.6.31-16-generic:/boot/initrd.img-2.6.31-16-generic:root=UUID=523cd06e-f460-4c88-b1e9-5382df4e5d37 ro quiet splash
- ...
- 
- I suspect that when I try to boot my karmic, it boots the karmic kernel
- with lucid userland -> nothing works.
- 
- ProblemType: Bug
- DistroRelease: Ubuntu 10.04
- Package: os-prober 1.36
- ProcVersionSignature: Ubuntu 2.6.32-19.28-generic 2.6.32.10+drm33.1
- Uname: Linux 2.6.32-19-generic i686
- Architecture: i386
- Date: Sat Apr  3 01:15:03 2010
- ProcEnviron:
-  LANG=de_DE.UTF-8
-  SHELL=/bin/bash
- SourcePackage: os-prober
+ menuentry '<name of first linux OS> (on /dev/sda2)' [...] {
+         [...]
+         set root='(hd0,msdos1)' # <- this is the boot partition, /dev/sda1
+         search --no-floppy --fs-uuid --set=root <UUID of /dev/sda1>
+         linux /vmlinuz-x.x.x root=UUID=<UUID of /dev/sda2> [...]
+         initrd [....]
+ }
+ menuentry '<name of second linux OS> (on /dev/sda3)' [...] {
+         [...]
+         set root='(hd0,msdos1)' # <- this is the boot partition, /dev/sda1
+         search --no-floppy --fs-uuid --set=root <UUID-of-/dev/sda1>
+         linux /vmlinuz-y.y.y root=UUID=<UUID of /dev/sda2 (!!!)> [...]
+         initrd [....]
+ }

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to os-prober in Ubuntu.
https://bugs.launchpad.net/bugs/554307

Title:
  linux-boot-prober yields wrong uuid for kernel root parameter

Status in os-prober package in Ubuntu:
  Triaged

Bug description:
  When os-prober detects another install on a system with a shared
  /boot, it sets up a menu to boot that install, but passes the kernel a
  root= argument directing it to mount the root partition of the install
  running os-prober instead of the partition on which the other system
  was found.  Example:

  menuentry '<name of first linux OS> (on /dev/sda2)' [...] {
          [...]
          set root='(hd0,msdos1)' # <- this is the boot partition, /dev/sda1
          search --no-floppy --fs-uuid --set=root <UUID of /dev/sda1>
          linux /vmlinuz-x.x.x root=UUID=<UUID of /dev/sda2> [...]
          initrd [....]
  }
  menuentry '<name of second linux OS> (on /dev/sda3)' [...] {
          [...]
          set root='(hd0,msdos1)' # <- this is the boot partition, /dev/sda1
          search --no-floppy --fs-uuid --set=root <UUID-of-/dev/sda1>
          linux /vmlinuz-y.y.y root=UUID=<UUID of /dev/sda2 (!!!)> [...]
          initrd [....]
  }

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/os-prober/+bug/554307/+subscriptions