(solved)symbianvibration example does not work in my N8

[owenzhao]

In qt sdk, there is an example call symbianvibration.
http://qt-project.org/doc/qt-4.8/widgets-symbianvibration-symbianvibration-pro.html
I run it in my N8, and it does not vibrate my phone.
My N8 is nokia belle system. Is that cause this?

Can someone try this example and tell me if you success?

Thank you.

[owenzhao]

It turns out that you need to disconnect the usb cable between the pc and you phone, then it works.