Standby - Wake up

  • Thread starter Thread starter Franz Leu
  • Start date Start date
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Franz Leu

Hi,

I have two questions related Standby and waking up:

1. Is there a way I can disable 'wake-up on USB action' on a post-FBA system
directly in registry?
The system does not have the device manager installed and unfortunately
wakes up from standby if someone touches the Touchscreen (using
USB-controller) or taps on the UBS-Keyboard.

We control the device, including standby modes, over a special application
using serial communication. Unfortunately, serial communication seems not be
seen as 'activity on the system' by the OS and after standby-timeout it
changes to standby. Of course, it does wake up again with the next serial
command since we have set COM-port IRQ's as wake-up events. However, this
always results in dark screen / out of sync LCD in periods of the set
standby-timeout for some seconds. So, my second question is:

2. Is there a way I can tell the system to accept traffic on the serial
ports as system activity and inhibit changing to standbywhile communication
is active?

Thanks for your help
Franz
 
No ideas .... doesn't matter anymore :-)

Found the solution:
Look for the device you wish to disable under the following keys:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\HID
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\USB
If you have found your device drill down the sub device It's (usually 2
levels) until you find 'Device Parameter' for the device.
Add a new REG_DWORD 'WaitWakeEnabled' with the value of 0 just below
'DeviceParameter'.
Reboot and that's it.

Setting back to 1 enables USB wake for the device and vice versa.
By default the key is not there and Windows uses the value of 1.

Franz
 
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