Finally, today my suspend to disk is working again after almost one year !!!! (I’m upgrade to 7.10 before it released)
Here’s what you need to do that (again). First you need newest ATI driver, you can get it from here (howto included). Install and configure it. Then you need to tweak some configuration.
And disable atieventsd
/usr/sbin/update-rc.d -f atieventsd remove
Reboot and now you can suspend again.
FYI I’m using s2disk to suspend.