On my MSI 990FXA-GD80 board with Phenom II X4 955, 6950 graphics card, 8GB RAM and Antec CP850 PSU, occasionally I resume from standby and the display doesn't wake up. I see the light flickering on the NIC socket on the board and my USB devices connected to a hub (mouse, keyboard, joystick) all come on (previously when I had this problem, the mouse would come on but no the keyboard but I think I fixed that by adjusting the power options for the USB hubs/ports in Device Manager).
The only thing I can do in this situation is to press the reset button, which is obviously not a desirable thing to have to do, so does anyone have any ideas? The 6950 is connected to my monitor via DisplayPort if that matters.