When I tried the latest 4.4 it didn't work. When I included 'nomodeset' it got to "loading initial ramdisk" and stopped.
When you boot with acpi=false the GUI is slow because it's using the Vesa driver -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1525615 Title: Ubuntu not booting on iMac 5K with ACPI enabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1525615/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs