revalidation failed (errorno =-5)

If you find your system isn’t booting sometimes and you get this funny error message, edit your kernel boot line in /boot/grub/menu.lst:

kernel /boot/vmlinuz-2.6.24-19-generic root=UUID=75a92494-bdae-4715-92d9-f06d1887008e ro all_generic_ide

e.g – Add the all_generic_ide parameter. All should be fine once again. I believe this is a strange Ubuntu kernel bug, although I’m not sure.

3 thoughts on “revalidation failed (errorno =-5)

  1. There’s a host of bug reports on failing to boot (e.g. but they seem to concern only linux 2.6.20.

    I’ve noticed this error (with subsequent “read error on device…” and “Buffer I/O error on device”) popping up after the computer has been in use for some time, and the disk completely locking up after that – not even responding to smartctl.

    This is with current kernels, and I notice you use 2.6.24, so I’ll try your suggestion. Do you have any pointers to any further information on what this is about?


  2. TANKS A LOT !!
    I was trying some like
    “ro splash noapic acpi=off”
    so …
    title Ubuntu 8.04, kernel 2.6.24-16-generic
    root (hd1,1)
    kernel /boot/vmlinuz-2.6.24-16-generic root=UUID=d88c93a3-4af3-4cd0-824e-8d5c172afc47 ro splash noapic acpi=off
    initrd /boot/initrd.img-2.6.24-16-generic
    But didnt work form.
    You sugestion works fine

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