I finally managed to solve my problem - it turns out to have been far simpler than expected: http://askubuntu.com/questions/692577/ubuntu-15-10-boot-hangs-when-starting-lightdm/692627#692627
I finally managed to solve my problem - it turns out to have been far simpler than expected: http:// askubuntu. com/questions/ 692577/ ubuntu- 15-10-boot- hangs-when- starting- lightdm/ 692627# 692627