[gentoo-user] Hibernation an mousewheel

Hi,

for my PC-mouse I am using imwheel to map the wheel and some buttons.

When the PC woke up from hibernation however these mapping are
"partially" lost:
When hover the mouse over a window and than using the wheel let me
jump through all virtual desktops instead scrolling the windows
contents.
But hover the mouse over the desktops background and use the wheel
will do nothing (which is ok).

Killing the imwheel task and restart it after wake from hibernation 
does not work.

How can I fix that?

Thank you very much for any help in advance!
Best regards,
mcc