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[Bug 1525615] [NEW] Ubuntu not booting on iMac 5K with ACPI enabled


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With a 27in 5k ( new as of two weeks ago) I'm unable to boot the kernel
without  parameter "acpi=off:", it also needs "nomodeset" into order to
get a working system.

The applies to both the live installer and a system installed on disk.
With out the parameters I just get a blank screen. It gives a blank
screen event if the "quiet" is removed from the kernel parameters.

The system has a 250G SSD.

I'm using the Kubutu live installer for Wily off a USB stick.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Tags: bot-comment kernel-bug
Ubuntu not booting on iMac 5K with ACPI enabled
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