RE: UP2414Q has issues waking up from sleep
Much better! I tried changing just the Link State Power Management under Balanced to Off in power options which had no effect. Changing to High Performance however seemed to work. I've tested it ~10 times so far and it has been waking up every time.
Win7 x64, R9 270, Catalyst 13.12, and 14.2beta, Dell UP2414Q, DP 1.2 60hz
These power management settings don't fix anything here. Monitor still fails to wake up about half the time, requiring a power-off, power-on to bring the display back. I haven't been able to find a pattern for when it wakes and when it doesn't. Dell UP2414Q and displayport are not ready for prime-time.