plasma process hangs when connecting usb hard disk

Hi all.

I’m running KDE 4.1.3 over Opensuse 11.1 64bit and since last week, when I plug in my previously working usb hard disk, plasma process goes into sleep mode, thus by hanging the complete Desktop.

I can click everywhere without reaction, no response to Alt-Tab neither, no response to mouse events. But, when I disconnect the usb drive, every event that didn’t worked, is then executed.

Any idea?