Changing grub default booting kenel on Ubuntu 9.10

Hm, I am having some trouble with the Vaio (still makes fan noise) but now it does not boot properly by default.

I think this is due to a software update... So my solution right away is to boot the previous version which is still on the disk....

• vi /etc/default/grub
   
• change GRUB_DEFAULT=0 value to 2 (kernel variation are installed by 2 - normal & safe)
  
  
• run "update-grub" 
  
• you can reboot then

To check the kernel used -> uname -r.