As far as I know, these problems are with Dreambox and Qviart Lunix. These vendors give very little support for their hardware in terms of open-source Enigma2 distributions (firmware).
Not in the case of Vu+, which does not update the HW drivers for open-source set-top boxes (for Linux) too often, but still updates them.
After all, according to what you write, then there will be no current HW drivers also for the Enigma2 distribution - VTi. And that's hard to believe.
But I dont know. Maybe I'm wrong. I'm not at all involved in Enigma2 compilations or creating Enigma2 distributions.