Comment 4 for bug 158107

Thanks for the reply richard.
The kernel you are currently using does not support dual core / multi processors. For dual core you need an SMP kernel, which in Ubutu has a name ending in -generic (instead of -386 you have now). The list you attached shows you do have a generic kernel for Gutsy installed on your PC (ii linux-image-2.6.22-14-generic), so you should be able to use that:
- reboot your PC
- in the grub boot menu* select the kernel with 2.6.22-14-generic, then press enter
- after logging in, check if both cores are active
(*you may need to press <Esc> to get the grub menu)

The question is: how did you get the -386 kernel installed? Did you do that yourself or was that done automatically during the update?