Public bug reported:

This kernel does not boot on my machine: it stops at loading the
ramdisk. The only information displayed is:

> Loading Linux 4.4.0-108-generic ...
> Loading initial ramdisk ...

I'd like to provide more information about what is happening (or not
happening), but I don't know how to debug kernel boot. Any suggestions
are welcome. :)

The previous kernel 4.4.0-104 works fine.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-108-generic 4.4.0-108.131
ProcVersionSignature: Ubuntu 4.4.0-104.127-generic 4.4.98
Uname: Linux 4.4.0-104-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  edysli     1873 F.... pulseaudio
 /dev/snd/controlC2:  edysli     1873 F.... pulseaudio
 /dev/snd/controlC0:  edysli     1873 F.... pulseaudio
CurrentDesktop: MATE
Date: Wed Jan 10 21:23:53 2018
HibernationDevice: RESUME=UUID=bf48c561-02f1-4545-8006-2ff0c00bd708
InstallationDate: Installed on 2016-08-09 (518 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
IwConfig:
 lo        no wireless extensions.

 enp3s0    no wireless extensions.
MachineType: System manufacturer System Product Name
ProcFB: 0 EFI VGA
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-104-generic 
root=/dev/mapper/hostname-root ro verbose
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-104-generic N/A
 linux-backports-modules-4.4.0-104-generic  N/A
 linux-firmware                             1.157.14
RfKill:

SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/27/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1905
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: P8H77-V
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr1905:bd10/27/2014:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP8H77-V:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

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


** Tags: amd64 apport-bug xenial

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https://bugs.launchpad.net/bugs/1742535

Title:
  4.4.0-108: stuck loading initial ramdisk

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This kernel does not boot on my machine: it stops at loading the
  ramdisk. The only information displayed is:

  > Loading Linux 4.4.0-108-generic ...
  > Loading initial ramdisk ...

  I'd like to provide more information about what is happening (or not
  happening), but I don't know how to debug kernel boot. Any suggestions
  are welcome. :)

  The previous kernel 4.4.0-104 works fine.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-108-generic 4.4.0-108.131
  ProcVersionSignature: Ubuntu 4.4.0-104.127-generic 4.4.98
  Uname: Linux 4.4.0-104-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.20.1-0ubuntu2.15
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  edysli     1873 F.... pulseaudio
   /dev/snd/controlC2:  edysli     1873 F.... pulseaudio
   /dev/snd/controlC0:  edysli     1873 F.... pulseaudio
  CurrentDesktop: MATE
  Date: Wed Jan 10 21:23:53 2018
  HibernationDevice: RESUME=UUID=bf48c561-02f1-4545-8006-2ff0c00bd708
  InstallationDate: Installed on 2016-08-09 (518 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 
(20160719)
  IwConfig:
   lo        no wireless extensions.

   enp3s0    no wireless extensions.
  MachineType: System manufacturer System Product Name
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-104-generic 
root=/dev/mapper/hostname-root ro verbose
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-104-generic N/A
   linux-backports-modules-4.4.0-104-generic  N/A
   linux-firmware                             1.157.14
  RfKill:

  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/27/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1905
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: P8H77-V
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev X.0x
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr1905:bd10/27/2014:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP8H77-V:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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