Sorry, my mistake. Recent kernel changes may be the trigger of this
problem but would not be the root cause. If there is any process
blocking waiting for entropy then that's the real issue. Because they
are blocking waiting indefinitely for something that might theoretically
take forever. And that's bad software design.

I guess therefore we don't need to find out which kernel version made it
worse recently. We need to find out which process is actually blocking
waiting for entropy. If anyone can figure that out from the logs, or by
looking at open files of each process and seeing who has /dev/random
open then it would help a lot.

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https://bugs.launchpad.net/bugs/1779476

Title:
  Ubuntu 18.04:  gdm3 does not switch to graphics after update

Status in gdm3 package in Ubuntu:
  Incomplete
Status in linux package in Ubuntu:
  Incomplete

Bug description:
  After update of gdm and kernel gdm3 no longer enables graphics.

  What happens:
  =============
  With and without:
     WaylandEnable=false
  in /etc/gdm3/custom.conf
  gdm3 does not switch to graphics.
  In both cases I case the X process running (Xwayland or Xorg) but no vt has 
it.
  lightdm does work, but barely. It takes up to a minute to get to the login 
screen.

  What I expected to happen:
  ==========================
  gdm3 switching to graphics in ~20 after boot like pre-update.

  Release:
  ========
  $ lsb_release -rd
  Description:  Ubuntu 18.04 LTS
  Release:      18.04
  $ apt-cache policy kernel-common gdm3 lightdm xorg xwayland
  kernel-common:
    Installed: (none)
    Candidate: 13.018+nmu1
    Version table:
       13.018+nmu1 500
          500 http://us.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
          500 http://us.archive.ubuntu.com/ubuntu bionic/universe i386 Packages
  gdm3:
    Installed: 3.28.2-0ubuntu1.3
    Candidate: 3.28.2-0ubuntu1.3
    Version table:
   *** 3.28.2-0ubuntu1.3 500
          500 http://us.archive.ubuntu.com/ubuntu bionic-proposed/main amd64 
Packages
          100 /var/lib/dpkg/status
       3.28.2-0ubuntu1.2 500
          500 http://us.archive.ubuntu.com/ubuntu bionic-updates/main amd64 
Packages
       3.28.0-0ubuntu1 500
          500 http://us.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
  lightdm:
    Installed: 1.26.0-0ubuntu1
    Candidate: 1.26.0-0ubuntu1
    Version table:
   *** 1.26.0-0ubuntu1 500
          500 http://us.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
          100 /var/lib/dpkg/status
  xorg:
    Installed: 1:7.7+19ubuntu7
    Candidate: 1:7.7+19ubuntu7
    Version table:
   *** 1:7.7+19ubuntu7 500
          500 http://us.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
          100 /var/lib/dpkg/status
  xwayland:
    Installed: 2:1.19.6-1ubuntu4
    Candidate: 2:1.19.6-1ubuntu4
    Version table:
   *** 2:1.19.6-1ubuntu4 500
          500 http://us.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
          100 /var/lib/dpkg/status


  
  Attaching journalctl -b.
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  DistroRelease: Ubuntu 18.04
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2016-08-27 (673 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 
(20160719)
  NonfreeKernelModules: wl
  Package: gdm3 3.28.2-0ubuntu1.3
  PackageArchitecture: amd64
  ProcVersionSignature: Ubuntu 4.15.0-24.26-generic 4.15.18
  Tags:  bionic package-from-proposed
  Uname: Linux 4.15.0-24-generic x86_64
  UpgradeStatus: Upgraded to bionic on 2018-05-05 (58 days ago)
  UserGroups: adm cdrom dip docker lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  mtime.conffile..etc.gdm3.custom.conf: 2018-06-30T11:12:29.280424
  --- 
  ProblemType: Bug
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  DistroRelease: Ubuntu 18.04
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2016-08-27 (674 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 
(20160719)
  NonfreeKernelModules: wl
  Package: linux
  PackageArchitecture: amd64
  ProcVersionSignature: Ubuntu 4.15.0-24.26-generic 4.15.18
  Tags:  bionic package-from-proposed
  Uname: Linux 4.15.0-24-generic x86_64
  UpgradeStatus: Upgraded to bionic on 2018-05-05 (58 days ago)
  UserGroups: adm cdrom dip docker lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  modified.conffile..etc.gdm3.custom.conf: [modified]
  mtime.conffile..etc.gdm3.custom.conf: 2018-06-30T11:12:29.280424

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