[vdr] TT 6400 S2 and DVB subtitles/OSD redraw problem

Hello,

this is probably a driver issue but does anyone here have experienced the OSD issue with the TechnoTrend 6400 S2 full-featured card when used as output?

The problem is that for example an open VDR menu will disappear everytime a new DVB subtitling "sequence" is drawn. Also new subtitles are "overwritten" on top of the old ones, without clearing.

Drivers:

linux-media-dkms 0~20120810.git285.323772.3~precise

VDR:

vdr 1.7.33-3yavdr0~precise vdr-plugin-dvbhddevice 1.7.33-3yavdr0~precise

On top of Ubuntu 12.04 from yaVDR repos.