Well in this particular situation I wanted to share something which would be useful to get the requirement. BIOS supposed to report e wake capabilities of the on board devices you are having like USB host controller. as far as I know there are some system which are having capability to report wake by using S3 system power state. It supposed to be work for the one on-board USB host controller which has been supported. The problem is supposed to occur when other systems is trying to use wake by using S3 system power state for USB host controller. it considers below mentioned factors.
- It supposed to loss power while S3 system power state is occurring on USB.
- All false device getting remove and false arrival notifications at the time of resuming from standby.
- All the usb devices are getting reset at time of suspend and resume.
- Resuming supposed to failed at the time of S3 system power state.
To avoid the negative impact Windows XP and Windows Server 2003 are having modified power capabilities and it supposed to be returned by the BIOS itself. Hence the system which you are using having support for wake by making use S1 system power state. In case there are no USB device that which has been armed for wake by using system power state. Then your system would simply enter into S3 system power state at the time of standby itself. If your system is having support wake by utilizing USB from S3 system power state. Then it could be modified by using following registry.
USBBIOSx registry can be used for all USB host controllers which you are having on your system. BIOS would provide wake capabilities for all the USB host controllers which are connected with the computer of yours.