czeslaw....in my case I know it's one of my Matrix card that is faulty. It is working perfectly fine until I leave the computer and windows fall into sleep. Then no matter what I do, it will never wake up. It is then turning purple (hehe...purple haz...

Yes, you are right. This is just a software solution avoiding "purple haze". But then again, while listen to Jimi, It works until we find out another solution

I had this problem but I did find a solution after a while. One of my Matrix card was shutting down and went into sleepmode when Windows was in restmode. What I did was to go to Controlpanel/System/Energy and create a new schema. Choose high energy a...