Encrypted swap not available

[werty2010]

after a usual reboot in nautilus i saw a strange 4.1 gb filesystem which could not be mounted. Soon i realized it was the swap, so i opened system monitor and "swap was not available".
until now i haven’t noticed any differences in performance but i don’t want to wait for a problem from this...

since i use this computer for everything... please point me to the right direction

[drs305]

If the only problem is an incorrect or missing UUID, this should fix it:

Run the following commands:

free -m

It should show your memory usage. Your swap line should not be all zeros.

Check for an existing fstab entry and confirm the UUID of the real swap partition:

grep swap /etc/fstab
sudo blkid -c /dev/null | grep swap

Are the UUIDs the same in both returns. If not, then you need to edit the fstab file and make sure it agrees with the UUID of the seceond command:

gksu gedit /etc/fstab

Make the change to the swap line, using the correct UUID, save the file, then run

sudo update-initramfs -uk all
sudo swapon -a

If swap mounts properly, no messages will be generated by the command.

If your system doesn't find a swap partition with the blkid command we'll have to create one.

[werty2010]

If the only problem is an incorrect or missing UUID, this should fix it:

Run the following commands:

free -m

It should show your memory usage. Your swap line should not be all zeros.

Check for an existing fstab entry and confirm the UUID of the real swap partition:

grep swap /etc/fstab
sudo blkid -c /dev/null | grep swap

Are the UUIDs the same in both returns. If not, then you need to edit the fstab file and make sure it agrees with the UUID of the seceond command:

gksu gedit /etc/fstab

Make the change to the swap line, using the correct UUID, save the file, then run

sudo update-initramfs -uk all
sudo swapon -a

If swap mounts properly, no messages will be generated by the command.

If your system doesn't find a swap partition with the blkid command we'll have to create one.

free -m:

                     total           used       free     shared    buffers     cached
Mem:          3819            1570       2249          0        102        585
-/+ buffers/cache:        881       2937
Swap:            0          0          0

grep swap /etc/fstab:

# swap was on /dev/sda5 during installation
#UUID=c7297cbb-fdb4-499a-8a26-2944fbe02051 none            swap    sw              0       0
/dev/mapper/cryptswap1 none swap sw 0 0

as a newbe im kind of lost.. could you be a bit more specific, thanks

[werty2010]

giving it a second look my swap line is all zeros...
what now?

[plucky]

giving it a second look my swap line is all zeros...
what now?

Follow the rest of the post by drs305 to fix your problem.

Good Luck

[werty2010]

drs305 i followed your instructions

the output of the second command( grep swap /etc/fstab )
is exactly the same with this ( gksu gedit /etc/fstab ).

despite this i followed your instructions and after " sudo swapon -a "
returned: " swapon: /dev/mapper/cryptswap1: stat failed: No such file or directory "

[NikTh]

Hi ,
can you post the results of

sudo blkid

Thanks

[drs305]

It looks like you might be using a RAID setup (/dev/mapper) and/or an encrypted partition. I'll have to let those familiar with how those interface with swap provide a solution as I have no experience with either. I'll continue to monitor the thread and post if I can provide anything useful.

[werty2010]

Hi ,
can you post the results of

sudo blkid

Thanks

output of "sudo blkid":

/dev/sda1: UUID="03dc6dc4-69a3-479b-b4b1-e6a7eb10f619" TYPE="ext4" 
/dev/sda5: TYPE="minix"

if this is any help, i'm on a laptop

[NikTh]

Hi ,

please post the output of

cat /etc/fstab
cat /etc/lsb-release && uname -r

Thanks