Hi
Long story short UP2414Q does not work properly in Windows 10, I had to revert back to Win 8.1
I use UP2414Q at 4K and 60Hz with HD4600 graphics (4760K processor) and a good quality DP cable. Monitor revision A01
My UP2414Q works quite well with Win 8.1. It does not wake up from sleep (no signal) so I don't use "sleep" but just switch off the monitor. Often it changes the resolution on wake up but it is bearable, I can easily increase it back to 4K. Worked slightly worse on Win 7.
Since upgrade to Win 10 with most recent graphic drivers (12/8/15) the monitor crashes the graphics drivers on wake up from sleep and when it is switched on from off. It causes reduced resolution which cannot be increased back to 4K since the drivers crashed. It also always brings up login screen as if I locked the computer. The only solution to change resolution is to restart. Problem occurs no matter whether monitor was switched off with the power button or went to power saving mode by inactivity.
I cannot install Win 8.1 drivers in Win 10.
Another bother is that right half of the screen flickers around 1-10% of the time in low brightness mode (worst at 0% brightness - setting I use at night).
No cold boot signal issues which were a problem with A00 revision.
My understanding is that Windows 10 does not handle well the weird way signal is sent to UP2414Q @ 4k and 60Hz. Is this a common problem? Do you guys work with Microsoft to fix this or do I have to change the monitor to use Windows 10?