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[Bug 1879987] Re: machine get stuck at boot if specified 'console=ttyS* ' doesn't exist.

 

** This bug is no longer a duplicate of bug 1573095
   Cloud images fail to boot when a serial port is not available

** No longer affects: linux (Ubuntu)

** Changed in: initramfs-tools (Ubuntu)
       Status: Confirmed => In Progress

** Also affects: initramfs-tools (Ubuntu Eoan)
   Importance: Undecided
       Status: New

** Also affects: initramfs-tools (Ubuntu Focal)
   Importance: Undecided
       Status: New

** Also affects: initramfs-tools (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** Also affects: initramfs-tools (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Also affects: initramfs-tools (Ubuntu Trusty)
   Importance: Undecided
       Status: New

** Also affects: initramfs-tools (Ubuntu Groovy)
   Importance: High
     Assignee: Guilherme G. Piccoli (gpiccoli)
       Status: In Progress

** Changed in: initramfs-tools (Ubuntu Eoan)
       Status: New => Won't Fix

** Changed in: initramfs-tools (Ubuntu Trusty)
       Status: New => Won't Fix

** Changed in: initramfs-tools (Ubuntu Xenial)
       Status: New => In Progress

** Changed in: initramfs-tools (Ubuntu Bionic)
       Status: New => In Progress

** Changed in: initramfs-tools (Ubuntu Focal)
       Status: New => In Progress

** Changed in: initramfs-tools (Ubuntu Trusty)
   Importance: Undecided => High

** Changed in: initramfs-tools (Ubuntu Xenial)
   Importance: Undecided => High

** Changed in: initramfs-tools (Ubuntu Trusty)
   Importance: High => Low

** Changed in: initramfs-tools (Ubuntu Bionic)
   Importance: Undecided => High

** Changed in: initramfs-tools (Ubuntu Focal)
   Importance: Undecided => High

** Changed in: initramfs-tools (Ubuntu Eoan)
   Importance: Undecided => Low

** Changed in: initramfs-tools (Ubuntu Focal)
     Assignee: (unassigned) => Guilherme G. Piccoli (gpiccoli)

** Changed in: initramfs-tools (Ubuntu Eoan)
     Assignee: (unassigned) => Guilherme G. Piccoli (gpiccoli)

** Changed in: initramfs-tools (Ubuntu Bionic)
     Assignee: (unassigned) => Guilherme G. Piccoli (gpiccoli)

** Changed in: initramfs-tools (Ubuntu Xenial)
     Assignee: (unassigned) => Guilherme G. Piccoli (gpiccoli)

** Changed in: initramfs-tools (Ubuntu Trusty)
     Assignee: (unassigned) => Guilherme G. Piccoli (gpiccoli)

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https://bugs.launchpad.net/bugs/1879987

Title:
  machine get stuck at boot if specified 'console=ttyS* ' doesn't exist.

Status in initramfs-tools package in Ubuntu:
  In Progress
Status in initramfs-tools source package in Trusty:
  Won't Fix
Status in initramfs-tools source package in Xenial:
  In Progress
Status in initramfs-tools source package in Bionic:
  In Progress
Status in initramfs-tools source package in Eoan:
  Won't Fix
Status in initramfs-tools source package in Focal:
  In Progress
Status in initramfs-tools source package in Groovy:
  In Progress

Bug description:
  kernel get stucks at boot if console=ttyS* is specified in the kernel
  cmdline and that serial HW isn't available on the system.

  Reproduced with:
  4.4 (from Xenial), 4.15 (from Bionic), 5.4 (native, Focal) and 5.7-next (mainline)

  Removing the non-existent 'console=ttyS*' parameter fixes the
  situation.

  I tested it using KVM/qemu, but it has been brought to my attention
  that it was reproducible in VMware as well.

  I think it is safe to say that it is unlikely to be specifics to a
  certain virtualization technology type.

  Didn't test on baremetal yet.

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