Dell Vostro 1400 not resuming from pm-hibernate.

Question

For some reason my laptop won't resume after hibernating with pm-hibernate.
I have added the resume hook to /etc/mkinitcpio.conf and the swap drive to /boot/grub/menu.lst.
Is s2disk reports no error when creating image file and the hook is run on next boot but it doesn't work.
dmesg output:
PM: Checking image partition /dev/sda6
PM: Resume from disk failed.
PM: Starting manual resume from disk
PM: Resume from partition 8:6
PM: Checking hibernation image.
PM: Error -22 checking image file
PM: Resume from disk failed.
Any ideas?

Answer 1

gustaf@myhost:~$ free
total used free shared buffers cached
Mem: 2062312 550380 1511932 0 39912 218132
-/+ buffers/cache: 292336 1769976
Swap: 2048252 0 2048252
gustaf@myhost:~$ df -h
Filesystem Size Used Avail Use% Mounted on
udev 10M 244K 9.8M 3% /dev
/dev/disk/by-uuid/295976ce-2dec-40c7-a8ae-499184c1b9ef
4.6G 1.3G 3.1G 30% /
none 1007M 24K 1007M 1% /dev/shm
/dev/sda1 487M 21M 441M 5% /boot
/dev/sda7 22G 17G 3.9G 81% /home
/dev/sda8 4.6G 3.6G 851M 81% /usr
/dev/sda2 25G 13G 13G 49% /mnt/winsys
/dev/sda5 54G 42G 12G 78% /mnt/windata