[Bug 14211] New: "Unable to mount root fs on unknown-block" on Boot after Kernel Upgrade

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Ubuntu | linux

           Summary: "Unable to mount root fs on unknown-block" on Boot after
                    Kernel Upgrade
           Product: Ubuntu
           Version: unspecified
          Platform: i386
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: linux
        AssignedTo: ben.collins at ubuntu.com
        ReportedBy: jawarren at gmail.com
         QAContact: kernel-bugs at lists.ubuntu.com


Linux kernels 2.6.10-5-686_34.4 and 2.6.11-1-686_0.2 panic on load with:

  Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)

2.6.10-5-386_34.3 works (I'm hesitant to upgrade to 34.4). My root filesystem is
reiserfs. The relevant lines from my grub/menu.lst:

  # kopt=root=/dev/hda1 ro
[...]
  # groot=(hd0,0)
[...]
  title           Ubuntu, kernel 2.6.10-5-686
  root            (hd0,0)
  kernel          /boot/vmlinuz-2.6.10-5-686 root=/dev/hda1 ro quiet splash
  initrd          /boot/initrd.img-2.6.10-5-686
  savedefault
  boot
[...]
  title           Ubuntu, kernel 2.6.10-5-386
  root            (hd0,0)
  kernel          /boot/vmlinuz-2.6.10-5-386 root=/dev/hda1 ro quiet splash
  initrd          /boot/initrd.img-2.6.10-5-386
  savedefault
  boot

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