Here is my workaround to scroll text content on VFD display of Duo2.
As Infobar content you will see ChannelName followed by Eventname (on the same line).
1. backup somewhere your actual skin_display.xml
2. copy my 'RunningText.py' /usr/lib/enigma2/python/Components/Renderer
3. copy 'g16ServiceNameEvent.py' to /usr/lib/enigma2/python/Components/Converter
4. copy one of my 'skin_display.xml' to /usr/share/enigma2/display
5. restart Enigma and enjoy
The difference between 'normal' and 'extralarge' is only one: im 'extralarge' (my prefered) Infobar has the maximal possible fontsize.
(Tested on Duo2 + ViX)