8 Replies Latest reply on Jun 22, 2016 11:55 AM by Intel Corporation

    Triple display only works when external monitors are connected in a specific order

    link626

      I've posted something similar recently, but I just wanted to consolidate into one post.

       

      Basically, triple display only works when the first monitor is connected to the laptop's built-in hdmi port first, then the 2nd monitor is connected to the  usb-c-hdmi2.0 adapter.

      Any other order, any other configuration involving displayport, will not work.

      There's only one way you can get laptop screen + 4k@60hz + 4k@30hz triple display.

       

      Here are my video demos---------

      triple display on hdmi ports success - YouTube

      triple display fail on hdmi ports. - YouTube

      triple display attempt on hdmi and displayport fails #1 - YouTube

      triple display attempt on hdmi and displayport fails #2 - YouTube

       

      Dual display works in any configuration.

       

      I bought 3 different adapters to try.

      I used a usb-c hdmi adapter made by Kanex which supports 1080p@60hz and 4k@30hz, and set all screens to 1080p.

      If the Kanex usb-c adapter is plugged in first, followed by the built-in hdmi port, triple display will not run.

      If you reverse the order and plug in the built-in hdmi port first, followed by the Kanex usb-c adapter, then triple display will work.

       

      The third usb-c hdmi adapter is made by Cellet, and it supports 4k@30hz. With this adapter, no matter what order you plug in the external monitors, the screens will blink every few seconds. In this case, Intel graphics control panel detects all 3 displays, but can't stabilize the configuration and keep it from blinking.

       

      Category

      Questions

      Answers (N/A if not applicable)

      Description

      Provide a detailed description of the issue

      Asus G501vw notebook

      i7 6700hq, HD530, optimus gtx960m, thunderbolt 3.

       

      ju6500 samsung 4k TV connected to Dell usb-c hdmi 2.0 adapter

      AOC U2879G6 4k monitor connected to hdmi 1.4 port

      Latest beta intel graphics driver.

       

      Total 3 screens with extended desktop.

       

      Triple display only works when hdmi 1.4 connected first, followed by usb-c-hdmi 2.0.

       

      Any other plug in sequence, even with displayport, results in triple display failure.

      Does it fail every single time, or only sometimes?
      If you can offer a % rate please do.

      every time.

      Hardware (HW)

      Brand and Model of the system.

      asus g501vw

      Hybrid or switchable graphics system?
      ie Does it have AMD or NV graphics too?

      nv optimus

      Make and model of any Displays that are used to see the issue (see note2 below).
      LFP
      = Local Flat Panel (Laptop panel)
      EFP = External Flat Panel (Monitor you plug in)

      LFP=  SAMSUNG      156HL01-104

      EFP1= AOC U2879G6

      EFP2= samsung 4k tv unknown panel.

      How much memory [RAM] in the system (see note2 below).

      8gb

      Provide any other hardware needed to replicate the issue.
      ie: Cables&brand, cable type [vga, hdmi, DP, etc], dock, dongles/adapters, etc

      Dell usb-c to hdmi 2.0 adapter. Model #47kd7

      Manufacturer Part# : 0M5WX

      Dell Part# : 470-ABMZ

       

      18gbps hdmi cables

      Hardware Stepping (see note1 below).

      see attached

      Software (SW)

      Operating System version (see note2 below).

      win10 home x64

      VBIOS (video BIOS) version. This can be found in “information page” of CUI (right click on Desktop and select “Graphics Properties”.

      don't see this info anywhere for intel 530.

      nvidia Video BIOS Version:  82.07.94.00.0a

      Graphics Driver version; for both integrated Intel and 3rd party vendors (see note2 below).

      see attached

      SW or Apps version used to replicate the issue.

      just windows 10

      Configurations

      Single display, clone, or extended (see note2 below).

      extended across 3 screens or cloned. same result

      Display resolution & refresh rate setting of each display (see note2 below).

      laptop 1080p 60hz

      aoc u2879g6 3840x2160 30hz

      samsung tv 3840x2160 60hz

      AC or DC mode, i.e. is power cable plugged in or not?

      power cable plugged in all devices

      How to repro

      Please provide steps to replicate the issue.  Thesesteps are very crucial to finding the root cause and fix.
      A screenshot to illustrate the issue is a huge plus. A video of the failure is even better! Attach to the post or provide the YouTube link.

      1. see youtube videos linked.
      2. connect first monitor to hdmi 1.4 port, then connect second display to usb-c-hdmi 2.0 port. Triple display works.
      3. Now unplug all the external monitors and start over. Connect first monitor to usb-c-hdmi 2.0 port. Then connect second display to hdmi 1.4 port. Triple display fails.
      4. Substitute usb-c-hdmi with usb-c-displayport, and no matter what order you plug in the external monitors, triple display fails.