Ubuntu: Sony laptops reboot on suspend

Does your Sony laptop reboot when you try to wake it from suspend sleep mode?
Are you running Ubuntu 12.04? Then this probably solves your issue... the catch is that it will cost you one more reboot.

Here goes
1. Edit the /etc/default/grub file.
sudo gedit /etc/default/grub
   
2. Find the line which says
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

and change it to

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_sleep=nonvs"

and save and close.

3. Update grub
sudo update-grub

This will take effect on next reboot. Enjoy.