Waiting for the timer.
Yeah I've tried adjusting the settings. The screen dims but it just doesn't go to sleep after the ten minutes it's set to
I am starting to think the sleep code is really buggy. I was fooling around with my machine and noticed sometimes it still doesn't sleep. I closed the lid earlier today and it didn't sleep, so I closed all the applications, still wouldn't sleep. So finally I rebooted it, now sleep works as I would expect.
Maybe we'll find a solution in a patch release.
[doublepost=1478314733][/doublepost]In the meantime, if you want to look for an application that's causing the issue. The tool I use to see if something is preventing sleep (run from the Terminal)...
$ pmset -g assertions | grep Prevent
PreventUserIdleDisplaySleep 0
PreventSystemSleep 0
PreventUserIdleSystemSleep 0
The output above shows nothing is stopping sleep. The next example I start `caffeinate` in another window and we see that process preventing sleep.
$ pmset -g assertions | grep Prevent
PreventUserIdleDisplaySleep 0
PreventSystemSleep 0
PreventUserIdleSystemSleep 1
pid 1046(caffeinate): [0x00001004000183e5] 00:00:02 PreventUserIdleSystemSleep named: "caffeinate command-line tool"