Physical (USB) keyboard keeps waking Android ICS tablet from sleep With (or without) my USB keyboard attached... my tablet will sleep after 1 minute of no activity, or if I manually make it sleep by tapping the power button. However, with my keyboard attached it will wake the tablet again after 30+ seconds. And it will continue to do this sleep..wake..sleep..wake.. until I disconnect the keyboard.

Is there any way to prevent the keyboard from waking the device?

Just to add... if the tablet was already sleeping when I connect the USB keyboard, then the tablet will still wake up after a short period of time. (It is not just when the tablet sleeps having been using the keyboard.) The lights on the keyboard flash just before the tablet wakes up, as if the tablet has sent the signal to 'wake up'?

The only related setting I can find is "Stay awake - Screen will never sleep while charging" (not selected) under Developer options.

EDIT: The tablet is a DGM T-703 7inch - a very generic/vanilla tablet AFAIK. The keyboard is an Afunta(TM) Artificial Leather Keyboard Case, but I have tried another standard USB keyboard and the same thing happens.
I now have the same issue using a 7" Sumvison Astro+ after updating the firmware to the manufactures latest ICS listed version. From what i can tell this issue has been introduced as it wasn't present when i first received the tablet with the original firmware.

The details the device lists are 

Android version 4.0.3 
build version 9F2-D1-H2-H01-2102.20120515
baseband version 1.1
Kernel version 3.0.8+

The release notes list nothing but stability improvements so no clues as to what has been tinkered with. Generally the update was successful a Wi-fi issue i had with streaming music has been cleared and the devices has had it's default CPU speed bumped up which makes it feel snappier, if this keyboard issue wasn't there it would be perfect.