[Bug 1622893] Re: NetworkManager takes very long to start, or times out, blocked on RNG

[Nikos]

Another possibility is to split the gnutls random generator
initialization to preinitialization (open fds, check for getrandom()),
and initialization (read from the previous detected sources). That would
allow gnutls to be used on early boot without causing any delay. The
drawback would be some performance penalty on multi-threaded
environments on the usage of the random generator.

I have patch at: https://gitlab.com/gnutls/gnutls/merge_requests/111/
if you are interested for a review or comments.

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https://bugs.launchpad.net/bugs/1622893

Title:
  NetworkManager takes very long to start, or times out, blocked on RNG

Status in Auto Package Testing:
  Fix Released
Status in gnutls28 package in Ubuntu:
  Triaged
Status in network-manager package in Ubuntu:
  New

Bug description:
  Since a few days ago, NetworkManager.service takes awfully long to
  start, or even times out on failure and then gets restarted. This
  happens in a 16.10 desktop amd64 installation in QEMU, or e. g. in the
  systemd "boot-smoke" autopkgtest where every boot takes > 1:30 minutes
  due to the NM timeout.

  In the journal there is no actual logging from
  /usr/sbin/NetworkManager yet, just the start timeout.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: network-manager 1.2.2-0ubuntu8
  ProcVersionSignature: Ubuntu 4.4.0-9136.55-generic 4.4.16
  Uname: Linux 4.4.0-9136-generic x86_64
  ApportVersion: 2.20.3-0ubuntu7
  Architecture: amd64
  CurrentDesktop: i3
  Date: Tue Sep 13 10:05:05 2016
  EcryptfsInUse: Yes
  IfupdownConfig:
   # interfaces(5) file used by ifup(8) and ifdown(8)
   auto lo
   iface lo inet loopback
   
   source-directory interfaces.d
  NetworkManager.conf:
   [main]
   plugins=ifupdown,keyfile,ofono
   
   [ifupdown]
   managed=false
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
   WimaxEnabled=true
  SourcePackage: network-manager
  UpgradeStatus: No upgrade log present (probably fresh install)
  nmcli-nm:
   RUNNING  VERSION  STATE      STARTUP  CONNECTIVITY  NETWORKING  WIFI-HW  WIFI     WWAN-HW  WWAN    
   running  1.2.2    connected  started  full          enabled     enabled  enabled  enabled  enabled

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