DM7020S:
GUI (enigma1):

Enigma stops responding while tuning to channel with no signal. After tuning to such channel channel list browsing slows down and stops at least to respond to any remote control command. Seems like some kind of buffer overflow. The only way to get the Box operational again is to kill old Enigma process with kill -9 command and restart the Enigma. I have heard that this is a common issue in all Dreamboxes. Does somebody know how to solve this?