On my MacBook Air, I upgraded from Ubuntu 16.04 to Ubuntu 18.04. Everything is fine, but booting with Ubuntu takes approx. 6 minutes!
Running $ systemd-analyze time outputs:
Startup finished in 4.480s (kernel) + 6min 545ms (userspace) = 6min 5.026s
graphical.target reached after 6min 535ms in userspace
The final part of $ systemd-analyze time:
...
[ 7.005447] Bluetooth: BNEP socket layer initialized
[ 7.354030] IPv6: ADDRCONF(NETDEV_UP): enx00e04c6800c5: link is not ready
[ 7.359359] IPv6: ADDRCONF(NETDEV_UP): enx00e04c6800c5: link is not ready
[ 7.363620] IPv6: ADDRCONF(NETDEV_UP): wlp3s0: link is not ready
[ 8.977999] r8152 2-1.4:1.0 enx00e04c6800c5: carrier on
[ 8.978018] IPv6: ADDRCONF(NETDEV_CHANGE): enx00e04c6800c5: link becomes ready
[ 359.996525] random: crng init done
[ 693.520385] thunderbolt 0000:07:00.0: resetting error on 0:b.
[ 693.520465] thunderbolt 0000:07:00.0: 0:b: hotplug: scanning
[ 693.520471] thunderbolt 0000:07:00.0: 0:b: hotplug: no switch found
[ 693.820626] thunderbolt 0000:07:00.0: resetting error on 0:b.
[ 693.820711] thunderbolt 0000:07:00.0: 0:b: got unplug event for disconnected port, ignoring
[ 1338.638266] thunderbolt 0000:07:00.0: resetting error on 0:b.
[ 1338.638283] thunderbolt 0000:07:00.0: 0:b: hotplug: scanning
[ 1338.638288] thunderbolt 0000:07:00.0: 0:b: hotplug: no switch found
[ 1338.938543] thunderbolt 0000:07:00.0: resetting error on 0:b.
[ 1338.938568] thunderbolt 0000:07:00.0: 0:b: got unplug event for disconnected port, ignoring
[ 1357.411889] Bluetooth: RFCOMM TTY layer initialized
[ 1357.411894] Bluetooth: RFCOMM socket layer initialized
[ 1357.411900] Bluetooth: RFCOMM ver 1.11
[ 1358.945100] rfkill: input handler disabled
The etc/fstab file:
...
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sda4 during installation
UUID=2ef34bb8-5360-460a-8a8a-646d3a102a3a / ext4 errors=remount-ro 0 1
# /boot/efi was on /dev/sda1 during installation
UUID=67E3-17ED /boot/efi vfat umask=0077 0 1
# swap was on /dev/sda5 during installation
UUID=7c820859-65c5-44ac-9704-b3e0bb8c8020 none swap sw 0 0
How can I further troubleshoot and possibly solve this problem? Thank you in advance.
Mario