Bug#552324: is this still a problem?
I have the same problem with my video card (also based on RC410). It doesn't wake up from suspend/hibernate. However, some people have been able to make it work:
Is this still a problem with the newer radeon driver from squeeze? If
so, could you try getting the even newer one from sid (you'll need a
newer kernel as well, either 2.6.32-10 from sid or 2.6.33 from
experimental). For this you will need to enable Kernel modesetting. add
radeon to /etc/modules and put options radeon modeset=1 in /etc/modprobe.d/radeon-kms.conf (you'll probably need to create the file).
Let me know, so we can send this upstream
Similar bugs: 573118