Dear all,
I've reported my problems with the Dell UP3216Q (bad flickering when waking up from sleep mode) here in this thread 3 years ago. I finally found out what caused the problem: obviously, within a multi-monitor environment, the flickering is induced when you use monitors with different resolutions, in my case the UP3216Q together with the U3011.
I recently got another UP3216Q as replacement for the NEC that had replaced the U3011, and since then no more flickering after wake up from sleep mode. Amazing. I thought I should share this here in the forum for the folks with similar problems.
HTH
Cyana
Is this under Windows 10? My personal experience with Windows 10 (combined with Nvidia drivers) hasn't be positive either.