Note that "random: crng init done" appearing very late is not a problem
by itself. User-noticeable delays only arise if some components (like
Bluetooth?) require the crng init to be completed in order for
themselves to initialize. This indicates poor design in those components
(they should never block indefinitely waiting for /dev/random) and is
not a problem with the random number generator itself.

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https://bugs.launchpad.net/bugs/1685794

Title:
  Boot delayed for about 90 seconds until 'random: crng init done'

Status in linux package in Ubuntu:
  Confirmed
Status in broadcom-sta package in Debian:
  New

Bug description:

  Shortened dmesg output, notice the unnaturally long delay before crng
  init finishes:

  [    8.533630] Bluetooth: hci0: Intel Bluetooth firmware patch completed and 
activated
  [    8.542239] input: HDA Intel PCH Mic as 
/devices/pci0000:00/0000:00:1b.0/sound/card1/input18
  [    8.542313] input: HDA Intel PCH Line as 
/devices/pci0000:00/0000:00:1b.0/sound/card1/input19
  [    8.542382] input: HDA Intel PCH Dock Line Out as 
/devices/pci0000:00/0000:00:1b.0/sound/card1/input20
  [    8.542449] input: HDA Intel PCH Headphone as 
/devices/pci0000:00/0000:00:1b.0/sound/card1/input21
  [    8.544240] cdc_ether 2-6:2.0 usb0: register 'cdc_ether' at 
usb-0000:00:14.0-6, CDC Ethernet Device, 02:1e:10:1f:00:00
  [    8.544271] usbcore: registered new interface driver cdc_ether
  [    8.637660] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
  [    8.654022] input: HP WMI hotkeys as /devices/virtual/input/input22
  [    8.688226] cdc_ether 2-6:2.0 enp0s20u6c2: renamed from usb0
  [    8.713288] iwlwifi 0000:02:00.0 wlo1: renamed from wlan0
  [    9.804308] input: ST LIS3LV02DL Accelerometer as 
/devices/platform/lis3lv02d/input/input23
  [   98.327857] random: crng init done
  [   98.330072] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
  [   98.330073] Bluetooth: BNEP filters: protocol multicast
  [   98.330077] Bluetooth: BNEP socket layer initialized
  [   98.443281] kauditd_printk_skb: 90 callbacks suppressed
  [   98.492927] IPv6: ADDRCONF(NETDEV_UP): enp0s25: link is not ready
  [   98.681030] IPv6: ADDRCONF(NETDEV_UP): enp0s25: link is not ready
  [   98.685672] IPv6: ADDRCONF(NETDEV_UP): enp0s20u6c2: link is not ready
  [   98.685789] cdc_ether 2-6:2.0 enp0s20u6c2: kevent 12 may have been dropped
  [   98.688384] IPv6: ADDRCONF(NETDEV_UP): wlo1: link is not ready
  [   98.690915] iwlwifi 0000:02:00.0: L1 Enabled - LTR Enabled

  ProblemType: Bug
  DistroRelease: Ubuntu 17.04
  Package: linux-image-4.10.0-19-generic 4.10.0-19.21 [modified: 
boot/vmlinuz-4.10.0-19-generic]
  ProcVersionSignature: Ubuntu 4.10.0-19.21-generic 4.10.8
  Uname: Linux 4.10.0-19-generic x86_64
  ApportVersion: 2.20.4-0ubuntu4
  Architecture: amd64
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', 
'/dev/snd/hwC1D0', '/dev/snd/pcmC1D0c', '/dev/snd/pcmC1D0p', 
'/dev/snd/controlC1', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D8p', 
'/dev/snd/pcmC0D7p', '/dev/snd/pcmC0D3p', '/dev/snd/controlC0', '/dev/snd/seq', 
'/dev/snd/timer'] failed with exit code 1:
  CurrentDesktop: Unity:Unity7
  Date: Mon Apr 24 14:58:33 2017
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2017-04-18 (5 days ago)
  InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
  MachineType: Hewlett-Packard HP EliteBook 840 G1
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-19-generic.efi.signed 
root=UUID=9fb9fc1d-15a4-4e98-a2ae-bf572e0900d5 ro quiet splash vt.handoff=7
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No 
PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-4.10.0-19-generic N/A
   linux-backports-modules-4.10.0-19-generic  N/A
   linux-firmware                             1.164
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/23/2016
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: L71 Ver. 01.37
  dmi.board.name: 198F
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 15.59
  dmi.chassis.asset.tag: USH452L0B1
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: 
dmi:bvnHewlett-Packard:bvrL71Ver.01.37:bd05/23/2016:svnHewlett-Packard:pnHPEliteBook840G1:pvrA3009DD10203:rvnHewlett-Packard:rn198F:rvrKBCVersion15.59:cvnHewlett-Packard:ct10:cvr:
  dmi.product.name: HP EliteBook 840 G1
  dmi.product.version: A3009DD10203
  dmi.sys.vendor: Hewlett-Packard

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