[Bug 1592466] [NEW] Ubuntu 16.04 LTS stalls during boot

[Ramnarayan Vedam]

Public bug reported:

Hardware: Mac Pro 5,1 (mid-2013)
Platform: Ubuntu 16.04 LTS Server
Details of Issue: 

Though Ubuntu 16.04 LTS Server successfully installs, upon boot it
stalls on trying to utilize the radeon driver. Specifically the boot
process stalls with the following message displayed:

fb: switching to radeondrmfb from EFI VGA

This is ignored when one boots ubuntu into recovery mode then selects
resume from the menu as it skips some normal checks before continuing
the boot process. Additionally, if one modified the grub boot options
and sets to boot the kernel with "nomodeset" and then blacklist the
driver, the entire issue is avoided and the machine boots as normal.

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1592466

Title:
  Ubuntu 16.04 LTS stalls during boot

Status in grub2 package in Ubuntu:
  New

Bug description:
  Hardware: Mac Pro 5,1 (mid-2013)
  Platform: Ubuntu 16.04 LTS Server
  Details of Issue: 

  Though Ubuntu 16.04 LTS Server successfully installs, upon boot it
  stalls on trying to utilize the radeon driver. Specifically the boot
  process stalls with the following message displayed:

  fb: switching to radeondrmfb from EFI VGA

  This is ignored when one boots ubuntu into recovery mode then selects
  resume from the menu as it skips some normal checks before continuing
  the boot process. Additionally, if one modified the grub boot options
  and sets to boot the kernel with "nomodeset" and then blacklist the
  driver, the entire issue is avoided and the machine boots as normal.

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