System doesn't resume from hibernate instead boot normally

[samtech]

Hi,
Initially hibernate/resume was working fine. But now system hibernate but doesn't resume, instead it boot-up normally. I had checked SWAP is mounted on /dev/sda2

I have tried hibernate from [menu] -> Leave -> Save to disk
There is no problem in hibernate process, but resume fails.

I have also installed uswsusp package and tried to hibernate through command "s2disk", again it hibernate properly but fail to resume.

Is there any thing to check?

[stepking2]

I've heard that Ubuntu have had some problems with hibernate, but how big is your swap partition?

[samtech]

Swap is of 5 GB. As system has 4 GB RAM

[samtech]

No one here to help he

Anyways, after googling a lot and with some trial and error i found one solution
I have to edit grub configuration and there resume device

1. Open /boot/grub/grub.cfg in nano

2. find following line
/boot/vmlinuz-3.2.6 root=UUID=<your disk uuid> ro text splash vga=791

There will be some hex characters in place of <your disk uuid>

3. Insert resume=/dev/disk/by-uuid/<your swap disk UUID> before the 'ro text splash vga=' . It should look lite this

/boot/vmlinuz-3.2.6 root=UUID=<your disk uuid> resume=/dev/disk/by-uuid/<your swap disk UUID goes here> ro text splash vga=791

Do not forget to replace <your swap disk UUID goes here> with actual UUID of your swap disk.
Save and exit. Now hibernate your system and boot again, it should start resuming from hibernate.