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[jean-christophe manciot <manciot.jeanchristophe@xxxxxxxxx>]

You are very quick to dismiss issues: following your comment, I changed
/etc/fstab swap priorities:

# swap was on /dev/sda6 during installation
UUID=4870beef-bb2c-40c1-91da-f1444f90c51b none            				swap    sw,nofail,pri=2  0       0

# swap on SSD Samsung
UUID=fa2b8ce4-6ce7-4fb2-ac12-475264bed20f none            				swap    sw,nofail,pri=1  0       0

However, the swap order is still incorrect:
swapon --summary
Filename				Type		Size              Used  	Priority
/dev/sdc2                             partition	50331644	0	        1
/dev/sda6                             partition	50331644	0	        -1

To make sure that the right UUIDs are declared:
sudo blkid
/dev/sda6: LABEL="MSI-GE60-Swap" UUID="4870beef-bb2c-40c1-91da-f1444f90c51b" TYPE="swap" PARTLABEL="Slow-Ubuntu-Swap" PARTUUID="a40b2587-deac-411f-8eee-6da7af30da2a"
/dev/sdc2: LABEL="SAMSUNG-Swap" UUID="fa2b8ce4-6ce7-4fb2-ac12-475264bed20f" TYPE="swap" PARTLABEL="Fast-Ubuntu-Swap" PARTUUID="1e289f8b-2281-4ec9-bd01-1b66fc79b359"

The issue is still there.

** Summary changed:

- Swapon does not respect fstab negative priorities order
+ Swapon does not respect fstab priorities order

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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to util-linux in Ubuntu.
https://bugs.launchpad.net/bugs/1516225

Title:
  Swapon does not respect fstab priorities order

Status in util-linux package in Ubuntu:
  Invalid

Bug description:
  uname -a
  Linux msi-ge60-ubuntu 4.2.0-18-generic #22-Ubuntu SMP Fri Nov 6 18:25:50 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

  
  sudo swapon --summary
  Filename				        Type		Size	                Used	Priority
  /dev/sdc2                              	partition	50331644	0	        -1
  /dev/sda6                              	partition	50331644	0	        -2

  However, in /etc/fstab:
  # swap was on /dev/sda6 during installation
  UUID=4870beef-bb2c-40c1-91da-f1444f90c51b none            				swap    sw,nofail,pri=-1  0       0

  # swap on SSD Samsung  /dev/sdc2
  UUID=fa2b8ce4-6ce7-4fb2-ac12-475264bed20f none            				swap    sw,nofail,pri=-2  0       0

  Does the fact that sdc2 is a SSD makes swapon override the fstab priorities? 
  It is suspicious that swapon prints sdc2 first in the summary. despite the following facts:
  - sdc2 priority is -2 in fstab
  - sdc2 is declared after sda2 in fstab
  - sdc2 is after sda2 in alphabetical order

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