2 Replies Latest reply on Aug 17, 2017 11:05 AM by amdmatt

    R9 380X: 4K monitor blinking between image and black when connecting through Displayport 1.2

    dtech

      I've recently bought a 4K monitor.

      It connects fine to my PC if I set it to Displayport 1.1 or if I connect with an HDMI cable, however then 4K is limited to 30Hz (no HDMI 2.0 support on the card) and I can't use FreeSync.

       

      Unfortunately, when I set the monitor to DP 1.2 and connect it, it blinks between a black screen and the PC image about once every 1-2 seconds. Here's a video.

       

      I've found this thread and others with similar problems and bought a short (2m) DP certified cable (Startech DISPL2M) as that was the only real suggestion but that didn't help.

      It exhibits the same behavior with a single monitor.

       

      When connected to a 2015 Macbook pro through a mini-DP -> DP adapter and the same cable it doesn't exhibit this behavior.

       

      How can I solve this?

       

      Specs

      Card: AMD R9 380X, Gigabyte GV-R938XG1 GAMING-4GD

      Type: Desktop

      OS: Windows 10 64-bit

      Driver: 17.7.2 (tried fixing it by upgrading the driver, happened too with the previous version which I believe was 17.1.1)

      Display Devices

      • Iiyama G-Master GB2888UHSU (the monitor in question), when connected with DP 1.2
      • Dell U2412M connected through DVI

      Motherboard: Intel P67 Express P67A-GD65 (B3)

      CPU: Intel Core i5-2500K
      PSU: Chouriki 2 750W

      RAM: 16GB DD3-1600