I am having the same problem too & cant find much help on this.
Asus site says the following
This phenomenon may be caused by VISTA OS. VISTA does not allow system to enter Standby mode, if "Allow this device to bring the computer out of standby" for an USB or PS/2 wake-supported device (such as mouse or keyboard) has been checked under "Device Manager", while the USB or PS/2 port has not switched its power mode to +5VSB that allows delivery of standby power to USB or PS/2 ports under soft OFF state. Because VISTA enables this standby option per default, and motherboards often set USB power modes to +5V at the same time, these two settings may result in conflict, hence resulting this phenomenon.
To resolve this, simply uncheck "Allow this device to bring the computer out of standby" for your USB mouse and PS/2 keyboard under "Device Manager", if you do not desire to wake the system via your USB mouse and/or PS/2 keyboard.
If you would like to wake your system from USB or PS/2 devices, please turn off your PC, set the appropriate USB port or PS/2 port jumper from +5V to +5VSB. Please follow the instructions in your user manual. Then your system will be able to enter and wake from standby mode as you desire.
Asus P5b dlx wifi mobo
Vista ultimate x64
7600GT PCIe card
tried default BIOS setting which used to work fine with XPsp2
When I press Sleep button on the keyboard what is happening is that its actually hibernating
It shuts down completely for 2 second then power up again but the power is only for the cabinet fans the hdd light up but the PS2 keyboard does not get power back so now I cant wake it up & I dont get the screen display & I have to do mains off from the UPS.
Then I start again & computer now says "windows resuming" instead of "windows starting" It then brings all my program open in the last state & takes 3-4 mins to do so.
Can someone give me Bios setting for this mobo along with Vista device manager settings.
It says "set the appropriate USB port or PS/2 port jumper from +5V to +5VSB."
Do I have to physically change something on the motherboard or its a setting in BIOS which I cant find. I am using the latest BIOS 1238 from Asus.