I tested with linux-*-3.18.0-031800rc3-generic_3.18.0-031800rc3.201411022335_amd64,unfortunately the bug still exist.
But I discovered how to enter suspend state SUCCESSFULLY on my computer with usb3.0 hdd.
1) plug USB3.0 HDD to USB3.0 port at motherboard(Asrock H77M) backpanel
2) mount USB3.0 HDD
3) use it
4) still usb-hdd mounted,do suspend from 'xfce4-session-logout' or 'action button' of desktop panel
by this method,my computer can enter suspend and resume with no problem.
when unmount USB3.0 HDD before suspend,the bug happen.
I tested with linux-* -3.18.0- 031800rc3- generic_ 3.18.0- 031800rc3. 201411022335_ amd64,unfortuna tely the bug still exist.
But I discovered how to enter suspend state SUCCESSFULLY on my computer with usb3.0 hdd.
1) plug USB3.0 HDD to USB3.0 port at motherboard(Asrock H77M) backpanel session- logout' or 'action button' of desktop panel
2) mount USB3.0 HDD
3) use it
4) still usb-hdd mounted,do suspend from 'xfce4-
by this method,my computer can enter suspend and resume with no problem.
when unmount USB3.0 HDD before suspend,the bug happen.
Hope this can help someone else.