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RX480 Dual Monitor setup but one monitor no signal on boot

Question asked by cogsman on Aug 17, 2016
Latest reply on Jan 18, 2018 by chut7

Here's my config:

 

ASUS RX480 8G

ASUS Z170i Pro-gaming mITX

i7-6700

32GB G.Skill 2400mhz DDR4

256GB SSD

2TB Seagate HDD

EVGA650 PSU

2 I-Inc (Hanns.G) 27" monitors running at 1920X1200

Windows 10

 

I have monitor 1 (left) connected to the DisplayPort and monitor 2 (right) connected to the HDMI connector.

When I boot, monitor 1 shows no signal while monitor 2 displays normally.

At the desktop, monitor 2 is still correctly the extended display, however monitor 1 is still no signal. I can move my mouse to the left screen (monitor 1).

If I unplug the DisplayPort and plug it back in, that usually fixes the problem, but sometimes it freezes and i have to reset; upon reboot it works fine.

This only happens at boot. After it's fixed, both monitors are fine for my whole session.

 

Any ideas what's going on?

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