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[PeterKnaggs <peter.knaggs@xxxxxxxxx>]

Public bug reported:

The Ubuntu 14.10 desktop amd64 live CD gives no graphical desktop on a Apple MacBookPro 8,3 (A1397) 2011
(hardware described here: http://www.penlug.org/foswiki/bin/view/Main/HardwareInfoAppleMacBookProA1297 ).

I also tested an upgrade from Ubuntu 14.04.02LTS to Ubuntu 14.10 and similarly lost the graphical login 
as xorg no longer started (only the tty terminal login prompt appeared after reboot).

Please let me know if any further info is needed to reproduce the issue on your side, or if you'd need me to
collect any further diagnostic info from the system, I'm a software engineer so I should be able to follow any
instructions you provide, including compiling patches etc.

I'm somewhat surprised that xorg would stop working on the Apple MacBookPro 8,3 as it uses the 
free radeon driver in Ubuntu 14.10 which has worked fine through many many Ubuntu upgrades 
on this particular machine. 

To reproduce the issue: attempt to start an Apple MacBookPro 8,3 using the Ubuntu 14.10 desktop amd64 live CD.
Notice that no graphical desktop ever appears.  
Alternately, after a fresh install of Ubuntu 14.04.02LTS, upgrade to 14.10, and notice no graphical desktop, only
they tty terminal login is presented.

I've tried searching for an explanation through many launchpad bugs, but
haven't found any other reports.

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

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https://bugs.launchpad.net/bugs/1436491

Title:
  Ubuntu 14.10 desktop amd64 live CD gives no graphical desktop on
  MacBookPro 8,3

Status in xorg package in Ubuntu:
  New

Bug description:
  The Ubuntu 14.10 desktop amd64 live CD gives no graphical desktop on a Apple MacBookPro 8,3 (A1397) 2011
  (hardware described here: http://www.penlug.org/foswiki/bin/view/Main/HardwareInfoAppleMacBookProA1297 ).

  I also tested an upgrade from Ubuntu 14.04.02LTS to Ubuntu 14.10 and similarly lost the graphical login 
  as xorg no longer started (only the tty terminal login prompt appeared after reboot).

  Please let me know if any further info is needed to reproduce the issue on your side, or if you'd need me to
  collect any further diagnostic info from the system, I'm a software engineer so I should be able to follow any
  instructions you provide, including compiling patches etc.

  I'm somewhat surprised that xorg would stop working on the Apple MacBookPro 8,3 as it uses the 
  free radeon driver in Ubuntu 14.10 which has worked fine through many many Ubuntu upgrades 
  on this particular machine. 

  To reproduce the issue: attempt to start an Apple MacBookPro 8,3 using the Ubuntu 14.10 desktop amd64 live CD.
  Notice that no graphical desktop ever appears.  
  Alternately, after a fresh install of Ubuntu 14.04.02LTS, upgrade to 14.10, and notice no graphical desktop, only
  they tty terminal login is presented.

  I've tried searching for an explanation through many launchpad bugs,
  but haven't found any other reports.

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