My mouse sends button#8 (left) and button#9 (right) events to clients. But the second click on the same (left or right) button is getting lost. The user needs to press some other button or move the mouse before another button#8 or button#9 event goes through.
I traced the events with DTrace and found that /dev/ums0 does produce the event packets correctly. But xorg loses them.
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