Surface Pro-2, i5, 256SSD, Ubuntu-16.04 and win8.1 dual boot. Default is 16.04.
Using the 18.04 install disk and GParted I shrunk the existing 16.04 partition and removed the swap file. Rebooted to 16.04 and all was good then went back to the 18.04 install and it too worked well afterwards, but now booting to 16.04 is now painfully slow.
I removed the swap entry in the /etc/fstab but boot is still painfully slow at over a minute-thirty-seconds. It used to be about twelve-seconds.
I then tried "systemd-analyze critical-chain" from a Comment here Slow boot after partition resize (editing fstab not working)
Everything on the resulting display starting with "graphical.target @1min 37.118s" and reduces down the list to "sysinit.target @1min 31.189s," so only covering around six-seconds. That is fast enough.
Then comes "brltty.target @4.839s" next on that list, so what is happening in between "sysinit.target" and "brltty.target?"
What do I try next?