[Bug 1769309] Re: Ubuntu 18.04 boot extremely slow

[John Bester]

Although I did not get the same entry in dmesg as Tonio, it did point me
towards dmesg. So I have attached my dmesg ouput. I have listed the
parts where significant time is somehow lost (please note that I am not
an expert and therefore I am not able to tell where exactly the gdm
login screen appeared).

#1
[    2.780216] clocksource: Switched to clocksource tsc
[   34.422902] random: crng init done

#2
[   40.242284] EXT4-fs (dm-2): mounted filesystem with ordered data mode. Opts: (null)
[  128.816712] audit: type=1400 audit(1525590690.456:2): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/snap/core/4486/usr/lib
/snapd/snap-confine" pid=1126 comm="apparmor_parser"

#3
[  135.805543] IPv6: ADDRCONF(NETDEV_CHANGE): enp2s0: link becomes ready
[  166.755990] ata4: exception Emask 0x10 SAct 0x0 SErr 0x4090000 action 0xe frozen

#4
[  171.739128] rfkill: input handler disabled
[  193.135040] FS-Cache: Loaded

#5 & 6
[  193.148640] No dialect specified on mount. Default has changed to a more secure dialect, SMB2.1 or later (e.g. SMB3), from CIFS (SMB1). To use the less secure SMB1 dialect to access old servers which do not support SMB3 (or SMB2.1) specify vers=1.0 on mount.
[  261.690048] No dialect specified on mount. Default has changed to a more secure dialect, SMB2.1 or later (e.g. SMB3), from CIFS (SMB1). To use the less secure SMB1 dialect to access old servers which do not support SMB3 (or SMB2.1) specify vers=1.0 on mount.
[  467.025578] kauditd_printk_skb: 48 callbacks suppressed


** Attachment added: "dmesg output"
   https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/1769309/+attachment/5134700/+files/dmesg.log

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https://bugs.launchpad.net/bugs/1769309

Title:
  Ubuntu 18.04 boot extremely slow

Status in plymouth package in Ubuntu:
  Confirmed

Bug description:
  I have upgraded Ubuntu 16.04 (amd64) using Gnome as desktop to Ubuntu
  18.04. Ubuntu 16.04 took just over 20 seconds from the time a
  selection on the Grub boot menu was made until the login screen was
  displayed. On Ubuntu 18.04 it takes about 20 seconds (from Grub menu)
  to display the boot splash screen and in total it takes about 2min
  30sec until the login menu (gdm) is displayed.

  Expected behaviour: 
  I would expect a new LTS release to have a similar boot time than the previous release. At this time I am experiencing boot times slower that those I had a few years ago from a traditional hard drive (which used to be just under 2min)

  Additional information:
  I have recently built two Ubuntu servers (17.10 in expectation of upgrading to 18.04 upon release). I found that the boot process went fairly smooth right until the end where it seems to wait for about a minute for what seems to be a network connection. After that wait period the text login prompt is displayed. So I am guessing that there might be a service start timeout which blocks the process.

  $ lsb_release -a
  No LSB modules are available.
  Distributor ID:	Ubuntu
  Description:	Ubuntu 18.04 LTS
  Release:	18.04
  Codename:	bionic

  $ uname -a
  Linux popeye 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:16:15 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

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