Gray background after wakeup after lion upgrade?
I have a MacPro i upgraded to Lion, it is a 2008 model with 2 Dell 27" monitors, and a ATI 5770 video card. After i upgraded to Lion everything seemed to work ok. the next morning i went back to the machine to wake use it again and when the monitors woke up, the background on the main monitor is grey, not the galaxy background that is the default. THe second monitor does not have this problem. Th only way i have been able to reset it to the image is to reboot, which i rarley do with this machine, It will stay on for months at a time, and i reboot only as needed. I have tried using the desktop & Screensave from system preferences and it does not do anything. I have even set it to change every 5 mins and it had no effect.
ANyone have a clue?
John