everything was working fine until a couple of days ago. I haven't made any chances to the hardware, the only major software installed was the latest graphics card driver (AMD Radeon 6770). I'm using Windows 7 Ultimate x64. I already tried to revert back to older drivers, but the error persists.
The problem only occurs after waking up from stand by. I can use the computer without any troubles, but as soon as I try to activate the second screen, the following occurs:
- the first screen goes into stand by
- mouse and keyboard stop working, replugging doesn't have any effect
- reset button on pc chassis has no effect
- HDs seem to keep working (activity indicated by LEDs) and the fans keep working, too
The only thing I can do in this state is power of the computer via on/off switch. There are no entries relating to this in the event viewer.
Since nothing has changed except the drivers and the problem is directly linked to them, the case seems to be clear. But since installing older drivers didn't remedy the situation, I'm at a loss here.