ATI proprietary - video initialize problem

Hi people.

My laptop has a problem initializing video with ATI proprietary driver. I am using Fedora 18 XFCE.

Problem happens sometimes, not always. When my laptop goes to suspend and if I try to wake up the system it sometimes resumes, and sometimes not. The same thing happens when booting the system. Sometimes it boots without the picture / display.

I am sure its related to video driver, but I dont know how to solve the problem. I have to use proprietary driver, because of power management and better energy saving.

Any tips?

---------- Post added at 01:42 PM ---------- Previous post was at 11:10 AM ----------

I forgot to say that my laptop is HP Pavilion g6 with:

Radeon HD 7420G
Radeon HD 7600M Series