I don't think this is related to some radeon stuff since I've got the same issue with an integrated intel card (when KMS is enabled, I can't resume from suspend....and when KMS is enabled, I can't go back from xset dpms force off (command to switch off the screen)).
I don't think this is related to some radeon stuff since I've got the same issue with an integrated intel card (when KMS is enabled, I can't resume from suspend....and when KMS is enabled, I can't go back from xset dpms force off (command to switch off the screen)).