Swap Memory Stays Inactive

[rez182]

i have 2gm RAM and 2.3 gb Swap. for some reason my swap memory does not activate on its own, i have to activate it manually from gparted each time i start ubuntu.

i did a fresh reinstall from scratch yesterday and created 2gb swap from installation disk. swap was activated automatically then. but hibernation did not work, so i increased swap to 2.3gb but didnt try hibernate yet, pretty sure it wont work. but the problem now is swap stays inactive in each boot.

why is this happening? how can i fix this? should i ask this question in launchpad.net?

thanks.

[TeoBigusGeekus]

Activate your swap and post us the output of

sudo blkid

and the contents of your fstab file

gksu gedit /etc/fstab

If you haven't used UUIDs in fstab, perhaps increasing swap via gparted changed its UUID and it's now not recognized by your system.

[rez182]

Results for sudo blkid:

/dev/sda1: UUID="8bcd1749-f82d-4d4a-967d-ee8a3583e8e2" TYPE="ext4"
/dev/sda5: UUID="c2b167db-7250-4d6a-900f-3e1d3cf599fb" TYPE="swap"

Results for gksu gedit /etc/fstab:

# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' to print the universally unique identifier
# for a device; this may be used with UUID= as a more robust way to name
# devices that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc nodev,noexec,nosuid 0 0
/dev/sda1 / ext4 errors=remount-ro 0 1
# swap was on /dev/sda5 during installation
UUID=cdca37ca-6eb0-414e-883a-a5c94d5f9465 none swap sw 0 0

[mc4man]

If you look you'll see the UUID's for swap are different
When you changed your swap it's UUID changed, so the one in fstab is now incorrect. Edit the entry in fstab to reflect the current one, as in

UUID=c2b167db-7250-4d6a-900f-3e1d3cf599fb

just edit the UUID=, the rest of the line is good

[plucky]

If you want to hibernate,and your uuid has changed,you also have to change etc/initramfs-tools/conf.d/resume to reflect the change in the UUID.

Please post output of

cat /etc/initramfs-tools/conf.d/resume

Good Luck

[QLee]

and don't forget to run an update-initramfs after putting the correct UUID in the config.

[rez182]

plucky Re: Swap Memory Stays Inactive
If you want to hibernate,and your uuid has changed,you also have to change etc/initramfs-tools/conf.d/resume to reflect the change in the UUID.

Please post output of Code:
cat etc/initramfs-tools/conf.d/resume

Output is:
cat: etc/initramfs-tools/conf.d/resume: No such file or directory. :S

mc4man Re: Swap Memory Stays Inactive
If you look you'll see the UUID's for swap are different
When you changed your swap it's UUID changed, so the one in fstab is now incorrect. Edit the entry in fstab to reflect the current one, as in

Code:
UUID=c2b167db-7250-4d6a-900f-3e1d3cf599fb
just edit the UUID=, the rest of the line is good

Changed and saved it.

QLee Re: Swap Memory Stays Inactive
and don't forget to run an update-initramfs after putting the correct UUID in the config.

How do i run an update-initramfs?

[plucky]

Output is:
cat: etc/initramfs-tools/conf.d/resume: No such file or directory. :S

Sorry I forgot to put a / in front of etc.I have corrected my other post as it is now

cat /etc/initramfs-tools/conf.d/resume

How do i run an update-initramfs?

From a terminal

sudo update-initramfs

Good Luck

[burton61]

i ran into the same problem when i wanted to update my swap memory. followed the walktrhu and it worked !!!
thanks

[rez182]

@plucky

sorry for the late reply, for some reason i could not access this thread from my mail, nor could i see this thread in my subscription list :S.

anyways the result for
cat /etc/initramfs-tools/conf.d/resume
is:
RESUME=UUID=cdca37ca-6eb0-414e-883a-a5c94d5f9465
i changed the UUID from fstab but the above UUID shows the previous UUID still.

and when i updated the initramfs using the code sudo update-initramfs it ask for more like

You must specify at least one of -c, -u, or -d.

Usage: /usr/sbin/update-initramfs [OPTION]...

Options:
-k [version] Specify kernel version or 'all'
-c Create a new initramfs
-u Update an existing initramfs
-d Remove an existing initramfs
-t Take over a custom initramfs with this one
-b Set alternate boot directory
-v Be verbose
-h This message

please help

EDIT: i selected "-u" eg: sudo update-initramfs -u
it then did something but nothing really happened.