Here is a better more recent screenshot (reduced exposure), after downloading skylake firmware...
** Attachment added: "boot log 12-08" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1524122/+attachment/4532003/+files/boot%20xps15%204.4rc4%202015-12-09.jpg -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1524122 Title: XPS 15 (9550) Won't boot with 4.4 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1524122/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs