http://bugs.winehq.org/show_bug.cgi?id=30057
--- Comment #36 from Vitaliy Margolen vitaliy-bugzilla@kievinfo.com 2012-03-14 21:48:24 CDT --- (In reply to comment #34) Calculation relative from absolute won't work. When pointer get's stuck in the corner absolute coordinates stop updating. While mouse keeps moving. This is why we need the physical mouse movement events.
What "raw motion inputs" are you talking about? Xi2 was supposed to provide those already.
Upstream & Resolved - not Wine bug, problem still exist. Upstream & closed - bug fixed upstream.