Freecom DVB-T channel scan crashes kaffeine

[Dieter]

> Before Kaffeine crashes, it reports:
>    ioctl DMX_SET_FILTER failed: Device busy
>    Reading SDT: pid=17
> 
> The diagnostic dvbusb driver reports:
>    dvbusb_usb_get_packets: Warning discarded 72 unknown bytes
>    pid 8941 (kaffeine), uid 1001: exited on signal 10 (core dumped)
> Or:
>    dvbusb_usb_get_packets: Warning discarded 180 unknown bytes
>    discontinuity for pid: 17 expected: 2 got: 8
>    pid 8966 (kaffeine), uid 1001: exited on signal 10 (core dumped)

An app should never dump core.  Can you use a debugger (e.g. gdb) and
get a stack back trace and see what Kaffeine did to get a bus error?