Public bug reported:

I am running Ubuntu-Server 14.04.5 LTS in a HyperV-VM with the Xenial
HWE-Stack enabled. Until the kernel 4.4.0-112 everything ran smoothly,
but with the kernel update to 4.4.0-116 the system cannot be launched
and stops during the boot with the following error message:

Gave up waiting for root device. Common problems:
 - Boot args (cat /proc/cmdline)
  - Check rootdelay= (did the system wait for the right device?)
  - Check root= (did the system wait for the right device?)
 - Missing modules (cat /proc/modules; ls /dev)
ALERT! /dev/disk/by-uuid/99acf869-911c-47ae-917f-7e82d3c99b8e does not exists. 
Dropping to a shell!

Also same behaviour with the latest kernel 4.4.0-119.

I already tried to boot with the rootdelay=10 argument but this has no effect. 
If you need further informations please tell me. Thanks for your support.

Best regards
Falk

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

** Attachment added: "apport-log.apport"
   
https://bugs.launchpad.net/bugs/1761694/+attachment/5103677/+files/apport-log.apport

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https://bugs.launchpad.net/bugs/1761694

Title:
  Ubuntu-Server does not launch after kernel update to 4.4.0-116

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I am running Ubuntu-Server 14.04.5 LTS in a HyperV-VM with the Xenial
  HWE-Stack enabled. Until the kernel 4.4.0-112 everything ran smoothly,
  but with the kernel update to 4.4.0-116 the system cannot be launched
  and stops during the boot with the following error message:

  Gave up waiting for root device. Common problems:
   - Boot args (cat /proc/cmdline)
    - Check rootdelay= (did the system wait for the right device?)
    - Check root= (did the system wait for the right device?)
   - Missing modules (cat /proc/modules; ls /dev)
  ALERT! /dev/disk/by-uuid/99acf869-911c-47ae-917f-7e82d3c99b8e does not 
exists. Dropping to a shell!

  Also same behaviour with the latest kernel 4.4.0-119.

  I already tried to boot with the rootdelay=10 argument but this has no 
effect. 
  If you need further informations please tell me. Thanks for your support.

  Best regards
  Falk

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