** Also affects: linux (Ubuntu)
   Importance: Undecided
       Status: New

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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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