I've got a Dell XPS system running Win 7 with R7 360 GPU connected to two NEC PA272W monitors.
On boot, everything comes up and both monitors run at full resolution (2560 x 1440). However, fter waking from sleep, one of the NEC monitors shows up with a lower resolution (1920 x 1200).
After wake - I cannot reset the resolution manually via Windows or AMD Catalyst.
Latest GPU driver, monitor driver, and o/s updates applied...