This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:

apport-collect 1824815

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

** Tags added: disco

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  With kernel 5.0.0-11-generic and nouveau, Ubuntu MATE has wrong colors
  and can't control brightness

Status in Ubuntu MATE:
Status in linux package in Ubuntu:

Bug description:
  With the latest kernel (5.0.0-11-generic) my MacBook with nouveau
  shows wrong colors and can't control brightness while running Ubuntu
  MATE. For example, Ubuntu MATE green appears as teal and orange like
  in the Firefox logo and window decorations is blue. This includes the
  plymouth boot logo, but not the desktop wallpaper.

  Screen brightness can't be controlled at all, neither with the
  keyboard keys (which have always worked automatically) nor in the
  Control Center > Power Management because no brightness slider appears
  at all.

  This also occurs in a live session from the latest daily build

  It does NOT occur in a live session of the latest (20190413.2) Ubuntu
  Desktop (GNOME).

  By editing /etc/default/grub to boot the previous kernel
  (5.0.0-8-generic), it works normally again.

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