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This mouse distinguishes horizontal wheel from vertical by a special "pseudo event" GenericDesktop.00b8, with values of 0 for vertical and 8 for horizontal wheel. Because this event is supplied by the parser too late, we need to delay a wheel event, wait for this one and send either REL_WHEEL or REL_HWHEEL to input depending on the event value. Signed-off-by: Pavel Troller <patrol@sinus.cz> Signed-off-by: Jiri Kosina <jkosina@suse.cz>