Once upon a time, I was dabbling with using NickelDBus to create a blank widget which sole purpose was to "eat" touch inputs in Nickel. Problem was, you plugging the device into USB would exit that widget, so I deemed it rather fragile, and didn't investigate further.
Another idea was to use that widget to generate "sane" touch events. Ideally those would be sent to a "uinput" device. But older Kobo's don't have uinput included in their kernel's, so I didn't get any further than that either.
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