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[Lars Noodén <lars.nooden@xxxxxxxxx>]

Is there some parameter I can pass to the kernel via grub to do
something useful?

When I edit the boot parameters to take out "splash" and "quiet" I get
more information and it stops right after these lines:

 [    7.57234] [drm] radeon kernel modesetting enabled.
 [    7.575302] fb: switching to radeondrmfb from EFI VGA

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https://bugs.launchpad.net/bugs/1415848

Title:
  Lubuntu vivid desktop amd64 does not boot

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Lubuntu vivid amd64 2015-01-28 does not boot on a MacBookPro.  Here
  are the hardware specs

  http://people.ubuntu.com/~larsnooden/Hw/macbookpro.lshw.html

  Here is the image which does not boot:
  http://iso.qa.ubuntu.com/qatracker/milestones/326/builds/88376/downloads

  The image starts in "insecure mode" and then GRUB comes up and offers
  several choices.  When choosing "Try Lubuntu without installing" it
  runs for a few seconds and then  freezes, apparently indefinitely.
  There is no way to get to another console with ctrl-alt-f1 or anything
  else.  The only text on the console is:

  [    7.093063] i i8042: No controller found
  starting version 218

  More or less the same error occurs when choosing "Install Lubuntu"
  from GRUB

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