[Bug 1734278] Re: Grub2 cannot boot up when 8254 time function disable

[Mario Limonciello]

** Also affects: grub2 (Ubuntu Bionic)
   Importance: Undecided
       Status: Triaged

** Also affects: grub2 (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: grub2 (Ubuntu Xenial)
       Status: New => Triaged

** Changed in: grub2 (Ubuntu Xenial)
     Assignee: (unassigned) => Mathieu Trudel-Lapierre (cyphermox)

** Changed in: grub2 (Ubuntu Bionic)
     Assignee: (unassigned) => Mathieu Trudel-Lapierre (cyphermox)

** Changed in: grub2 (Ubuntu Xenial)
   Importance: Undecided => Critical

** Changed in: grub2 (Ubuntu Bionic)
   Importance: Undecided => Critical

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https://bugs.launchpad.net/bugs/1734278

Title:
  Grub2 cannot boot up when 8254 time function disable

Status in HWE Next:
  Triaged
Status in OEM Priority Project:
  Triaged
Status in grub2 package in Ubuntu:
  Triaged
Status in grub2 source package in Xenial:
  Triaged
Status in grub2 source package in Bionic:
  Triaged
Status in grub2 package in Debian:
  Unknown
Status in grub2 package in Fedora:
  Confirmed

Bug description:
  Fail to boot into Ubuntu GRUB on the platforms which legacy(8254) timer function is disabled.
  "8254 clock gating" is provided to disable 8254 timer to get rid of legacy and save power. The platforms with the firmware which disable the 8254 timer will fail to boot up and block on grub2 which uses the 8254 timer to calibrate the TSC.

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