I had a similar problem with Linux Mint (based on Ubuntu 8.10) on my Dell 1521. I deactivated the ATI/AMD video driver and now Suspend works. Hibernate still doesn't work (it tries and then comes back up immediately), but this might be due to the fact that I have a swap file instead of a swap device.
I had a similar problem with Linux Mint (based on Ubuntu 8.10) on my Dell 1521. I deactivated the ATI/AMD video driver and now Suspend works. Hibernate still doesn't work (it tries and then comes back up immediately), but this might be due to the fact that I have a swap file instead of a swap device.