I found this on the old forum. It was to get PM working on a Nexus 4, but works on any Ubuntu Touch device.

1. Install ubuntu touch vivid
2. Because you are going to install a lot of packages you need more space in your /usr directory. I couldn't enlarge the Partition so I loop mounted it to /home as described here: http://askubuntu.com/questions/514913/ho...n-on-touch (remember to set the executable bit for the script)
3. Download the tarball for the Nexus 5 http://kubuntu.plasma-mobile.org/pool/
4. Extract the remaster script
5. Delete the Line echo 'Acquire::http { Proxy "http://localhost:3142"; };' > /etc/apt/apt.conf.d/cacher (I don't get it why they want to use cacher for a single device)
6. Run the script via ssh or adb (sometimes the script stops so its better to run the commands manually one by one)
7. Reboot
8. First boot might take a while

Score, sounds like this would work to get it running under MultiRom. If it works I'll post back.

On bq E5, I'm able to get to the state it boots, vrrrrm, vrrrrrm sound plays but that's all . Any idea how to debug? I've never touched something with Wayland before...