Another thing of note: I saw my full desktop momentarily immediately after login. It flashed up for a full second or so. I found this line interesting in the system log during that time:
Feb 19 12:02:24 clarity DisplayLinkUserAgent[263]: BUG in libdispatch client: kevent[EVFILT_MACHPORT] add: "No such file or directory" - 0x2
Also these:
Feb 19 12:02:34 clarity com.apple.xpc.launchd[1] (com.displaylink.useragent): This service is defined to be constantly running and is inherently inefficient.
Feb 19 12:02:34 clarity com.apple.xpc.launchd[1] (com.displaylink.useragent): Please switch away from OnDemand to KeepAlive.
Here's a link to see the full boot/login process if it helps:
https://www.dropbox.com/s/2vc9z507fc...otlog.rtf?dl=0