Comment 26 for bug 1533221

Using the latest 4.4.0 kernel, I can now boot. But only with nvidia graphics card enabled. Intel graphics is still broken.

Backlight function keys are still not working. I have tried various combinations of:
acpi_osi=Linux acpi_backlight=native
acpi_osi=Linux acpi_backlight=vendor
etc

with no luck.

ian@wallyworld:~$ apt-cache policy linux-image-4.4.0
linux-image-4.4.0-0-generic:
  Installed: 4.4.0-0.12
  Candidate: 4.4.0-0.12
  Version table:
 *** 4.4.0-0.12 0
        500 http://ppa.launchpad.net/canonical-kernel-team/unstable/ubuntu/ xenial/main amd64 Packages
        100 /var/lib/dpkg/status
linux-image-4.4.0-040400-generic:
  Installed: 4.4.0-040400.201601101930
  Candidate: 4.4.0-040400.201601101930
  Version table:
 *** 4.4.0-040400.201601101930 0
        100 /var/lib/dpkg/status
linux-image-4.4.0-0-lowlatency:
  Installed: (none)
  Candidate: 4.4.0-0.12
  Version table:
     4.4.0-0.12 0
        500 http://ppa.launchpad.net/canonical-kernel-team/unstable/ubuntu/ xenial/main amd64 Packages