http://bugs.winehq.org/show_bug.cgi?id=13351
--- Comment #20 from findus8128@gmail.com 2013-08-23 11:50:15 CDT --- This issue is most probably not Wine’s fault. According to the following thread on the GOG.com forum, there are problems with some mouse drivers under Windows, too:
http://www.gog.com/forum/empire_earth_series/mouse_problems_with_empire_eart...
It seems that Empire Earth does not handle mouse acceleration correctly. This is what you have to do to get your mouse working under Linux:
# Take note of the ID of your mouse:
xinput xinput set-prop <ID of your mouse> 'Device Accel Profile' 6
# If your mouse still moves too slowly:
xinput set-prop <ID of your mouse> 'Device Accel Velocity Scaling' 100
For further information, see:
http://www.x.org/wiki/Development/Documentation/PointerAcceleration/
Happy Gaming!