Question [Q] Samsung Galaxy Note (n8010) - Ubuntu is running but only black screen on device

I followed the instructions in this thread and successfully installed Ubuntu onto my n8010 (I used the n8013.zip and removed the assert as recommended). I cannot post this question in that thread as I am a new user so don't have enough privileges. I then followed the instructions on the wiki to fix the reboot problem.

Using "adb shell" from my OS X terminal I can access and use Ubuntu through the shell.

On the device itself however, nothing is shown after the initial Samsung Note logo. The screen is on because I can see that it is slightly backlit, but other than that it is just black.

I can see many other posts on these forums about similar issues, however none of them seemed to confirm that Ubuntu was working (via adb) and none of them seemed to be resolved either.

Does anyone have any suggestions for what might be wrong, or why the Ubuntu desktop is not showing up?