I did some more testing with proxmox 4 install as guest vm (proxmox 3.4 host). When I passthrough the dvb card, the install fails as mentioned previously (same error like on the host itself!).
I was able to blacklist the ddbridge module by passing the following parameter to grub:
Code:
modprobe.blacklist=ddbridge
So that the grub entry looks like this:
Now the installation seems to start. Imho the kernel/installer should not load ddbrige if its a outdated or broken version!