Public bug reported:

Binary package hint: util-linux

This laptop (davros) is running with the natty repository, having been 
dist-upgraded a few weeks ago from maverick.
(It was installed many versions ago and has worked through many updates).

My swap has gone away (0 shown in all 3 fields in free), and during a
boot I (as of about a week ago) gained a warning that the device
providing a given UUID was not available and whether I wanted to wait
for it. (Actually the other strange symptom was the loss of the ability
to hibernate - which makes sense due to the lack of swap)

That UUID that's not available corresponds to the line in my fstab:

# /dev/sda5
UUID=babe3fc2-f612-4961-aa7c-de028b6b883a none            swap    sw            
  0       0

yet while /dev/sda5 exists:
grep sda5 /proc/partitions 
   8        5    2650693 sda5

there is no entry in /dev/disk/by-uuid for it; using blkid again shows
nothing for the device:

r...@davros:/dev/disk# blkid -p /dev/sda5
r...@davros:/dev/disk# 

The following od of /dev/sda5 seems to show the uuid starting at
0002014:

0000000  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
         00  00  00  00  00  00  00  00  00  00  00  00  00  00  00  00
*
0002000 001  \0  \0  \0 220 034  \n  \0  \0  \0  \0  \0 272 276   ? 302
         01  00  00  00  90  1c  0a  00  00  00  00  00  ba  be  3f  c2
0002020 366 022   I   a 252   | 336 002 213   k 210   :  \0  \0  \0  \0
         f6  12  49  61  aa  7c  de  02  8b  6b  88  3a  00  00  00  00
0002040  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
         00  00  00  00  00  00  00  00  00  00  00  00  00  00  00  00
*
0007740 027   !  \0  \0  \0  \0  \0  \0 001  \0  \0  \0   S   W   A   P
         17  21  00  00  00  00  00  00  01  00  00  00  53  57  41  50
0007760   S   P   A   C   E   2   L   I   N   H   I   B   0   0   0   1
         53  50  41  43  45  32  4c  49  4e  48  49  42  30  30  30  31
0010000   3   3   9  \n  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
         33  33  39  0a  00  00  00  00  00  00  00  00  00  00  00  00
0010020  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0
         00  00  00  00  00  00  00  00  00  00  00  00  00  00  00  00
*


Dave

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: libuuid1 2.17.2-3.3ubuntu1
ProcVersionSignature: Ubuntu 2.6.37-2.10-generic 2.6.37-rc1
Uname: Linux 2.6.37-2-generic x86_64
Architecture: amd64
Date: Sat Nov 27 17:16:20 2010
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
SourcePackage: util-linux

** Affects: util-linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug natty

-- 
[natty] swap not showing uuid
https://bugs.launchpad.net/bugs/682176
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