Ubuntu 17.04 Long boot time due to intel-vbtn

Question

Just installed Ubuntu 17.04 today on my Spectre x360 laptop, but its taking about 2 minutes to boot (Windows took ~10 seconds).

As suggested here: How to fix very slow Ubuntu booting? I ran the dmesg command, here is an excerpt of the output where I believe the problem is:

[    5.771049] audit: type=1400 audit(1492997122.163:7): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/connman/scripts/dhclient-script" pid=747 comm="apparmor_parser"
[    5.772152] audit: type=1400 audit(1492997122.163:8): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/sbin/cups-browsed" pid=751 comm="apparmor_parser"
[    5.773675] audit: type=1400 audit(1492997122.163:9): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/cups/backend/cups-pdf" pid=752 comm="apparmor_parser"
[    5.773677] audit: type=1400 audit(1492997122.163:10): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/sbin/cupsd" pid=752 comm="apparmor_parser"
[   16.086226] intel-vbtn INT33D6:00: unknown event index 0xcd
[   28.153199] intel-vbtn INT33D6:00: unknown event index 0xcd
[   95.264415] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   95.264417] Bluetooth: BNEP filters: protocol multicast
[   95.264420] Bluetooth: BNEP socket layer initialized
[   95.331589] haswell-pcm-audio haswell-pcm-audio: FW loaded, mailbox readback FW info: type 01, - version: 00.00, build 77, source commit id: 876ac6906f31a43b6772b23c7c983ce9dcb18a19
[   95.429468] IPv6: ADDRCONF(NETDEV_UP): wlo1: link is not ready
[   95.431987] iwlwifi 0000:02:00.0: L1 Enabled - LTR Enabled
[   95.432503] iwlwifi 0000:02:00.0: L1 Enabled - LTR Enabled
[   95.497193] iwlwifi 0000:02:00.0: L1 Enabled - LTR Enabled
[   95.497668] iwlwifi 0000:02:00.0: L1 Enabled - LTR Enabled
[   95.522825] IPv6: ADDRCONF(NETDEV_UP): wlo1: link is not ready
[   95.531535] iwlwifi 0000:02:00.0: L1 Enabled - LTR Enabled
[   95.531986] iwlwifi 0000:02:00.0: L1 Enabled - LTR Enabled
[   95.604347] iwlwifi 0000:02:00.0: L1 Enabled - LTR Enabled

I really wasn't able to find much on what intel-vbtn INT33D6:00: unknown event index 0xcd is or how to fix it so any suggestions would be helpful.

Answer 1

Update

As mentioned in the comments, if you have an encrypted home, Ubiquity still creates a cryptoswap partition instead of linking to the swapfile.

This can be fixed by following this guide:

Ubuntu Desktop 17.04 64bit slow boot

Original Workaround

First off I want to clarify that I have the same issue and so I want to give some further details on the hardware (for all those who might be able to debug the error):

• HP Spectre x360 15-bl002ng
• Intel i7-7500U
• Nvidia 940MX
• NVME PCIe SSD (Samsung I believe)

Second:

I found a workaround by setting the systemd timeout to 10s instead of 90s. To do so, edit /etc/systemd/system.conf. In my case I had to uncomment the following two lines set the timer:

DefaultTimeoutStartSec=10s
DefaultTimeoutStopSec=10s

After a reboot, the system is up after about 10 seconds. May be warned however, that such a low timeout may cause other, more severe problems. So do that at your own risk!

Third:

For all those who can actually figure out what might be wrong I would like to add what I found out:

After I upgraded to kernel 4.11 RC8 (to fix intel-vbtn INT33D6:00: unknown event index 0xcd, comment #24) I got way more debug info and so noticed that the boot sequence is actually stuck at A start job is running for [some dev + UUID presumably].

I stumbled across a German Debian forum where the error seems to be caused by a mismatch of the actually UUID of the swap partition reported by sudo blkid and the used UUID by fstab.

However, since 17.04 Ubuntu uses a swapfile instead of a partition, I am clueless on how to fix this issue.