Is there any way to check if the trouble with keyboard and/or mouse becoming unresponsive, where keyboard and mouse are from 2.4G wireless optical mouse & standard keyboard set, is caused by some interference with wireless signal, problem with USB receiver, or problem with operating system (with software)?
Hardware in question: Media-Tech "Melville" (MT1413US) 2.4G wireless optical mouse & standard keyboard set,
Software in question: GNU/Linux with X-Window System.
Status for 29-07-2009:
Mouse from the set works correctly and without trouble; keyboard stopped working at all (even very close to the 2.4GHz RF receivier). Swapping AA battery for new one (even though it should still have juice) didn't help. It might be software issue:
lsusb -v lists "Keyboard" HID device.
Fortunately I still have old wired PS/2 keyboard this one was to be replacement for...