Gene,
It's highly likely our chips are different, but they all seem related to RC410 -> http://www.x.org/wiki/Radeon%20ASICs
Nevertheless, try this: in a terminal run gconf-editor
Now there browse to: apps/gnome-power-manager/general/
On the righthand side you should see network_sleep (hopefully) and you can activate it.
Hope it works
Gene,
It's highly likely our chips are different, but they all seem related to RC410 -> http:// www.x.org/ wiki/Radeon% 20ASICs
Nevertheless, try this: in a terminal run gconf-editor
Now there browse to: apps/gnome- power-manager/ general/
On the righthand side you should see network_sleep (hopefully) and you can activate it.
Hope it works