slow booting after installation of another Linux

[Richard Weait]

On Sun, Oct 7, 2012 at 4:22 PM, D. Hugh Redelmeier <hugh-pmF8o41NoarQT0dZR+AlfA at public.gmane.org> wrote:
> After installing another version of Linux, my original Linux became
> slow to boot.
>
> Spoiler:
> The problem was that I let the new installation reformat the swap
> partition.  In the process, it gave it a new UUID.  That means that
> the fstab entries on the old system referred to the partition by a
> UUID that no longer existed or worked.
>
> Diagnosis:
>
> 1. booting was slow.  The splash screen gives no clue other than time.
>
> 2. changed the "linux" line in grub.cfg, removing "quiet" and "rhgb".
>    This means that logs will pour out as booting proceeds.
>    (You can make this change on-the-fly, for a single boot, by
>    asking grub to let you edit.)
>
> 3. During booting, the log pauses with a message somewhat like:
>         systemd[1]: Recreating volatile files
>
> 4. After the boot, in dmesg output, at about the same timestamp, there
>    are messages about not finding partitions with the old UUID.
>
> Fix:
>
> Edit /etc/fstab to refer to the swap partition with the new UUID.

Great story.  Better than "Twilight".  Would read again.  :-)

Thanks for the problem report and solution, Hugh!
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