DisplayLink Forum - View Single Post - Monitor connected to Dell 3100 not getting detected when waking a laptop from sleep

wstidolph · 11-15-2019, 08:16 PM

FWIW, I'm having a similar issue.

I have a Dell XPS 8930 machine with the GTX745 card, and a Dell 3100; my main (4K0 display is directly tied to the GTX745, and two side monitors (1920x1200 each) are connected to the Dell 3100 unit (one HDMI, one DVI). Since the Win 10 Pro 1903 build (roughly) and now on Insider Preview build 19023, when wake-from-deep-sleep the DisplayLink-connected side monitors often don't wake up ... the audio output from the 3100 works fine and the USB devices I have connected to the 3100 seem to be passed through.

I noticed that the Windows Desktop Window Manager was eating a lot of CPU and apparently not using the GPU, so I took to killing that Manager process via Task Manager - that quickly resets the behavior to normal (the monitors get turned on, and the Window Manager CPU use goes back to negligible).

Unplugging/replugging didn't work for me; I put the machine to 'sleep', woke it up, main monitor on, side monitors powered on but no video; unplugged one side monitor and plugged it back in, no change.

I have updated the DisplayLink drivers (now on 9.1.1644.0 according to the Display Manager Properties for my two Display Manager/Display adapters/"Dell USB3.0 Dock" entries), but the DisplayLink System Tray says I'm running 8.3.2938.0 so I'm confused) and the system passesCompatabilityCheck8.2M1.

It's very frustrating. I hope DL responds to you!

11-15-2019, 08:16 PM	#9
wstidolph Junior Member Join Date: Nov 2019 Location: Santa Cruz, CA, USA Posts: 2	FWIW, I'm having a similar issue. I have a Dell XPS 8930 machine with the GTX745 card, and a Dell 3100; my main (4K0 display is directly tied to the GTX745, and two side monitors (1920x1200 each) are connected to the Dell 3100 unit (one HDMI, one DVI). Since the Win 10 Pro 1903 build (roughly) and now on Insider Preview build 19023, when wake-from-deep-sleep the DisplayLink-connected side monitors often don't wake up ... the audio output from the 3100 works fine and the USB devices I have connected to the 3100 seem to be passed through. I noticed that the Windows Desktop Window Manager was eating a lot of CPU and apparently not using the GPU, so I took to killing that Manager process via Task Manager - that quickly resets the behavior to normal (the monitors get turned on, and the Window Manager CPU use goes back to negligible). Unplugging/replugging didn't work for me; I put the machine to 'sleep', woke it up, main monitor on, side monitors powered on but no video; unplugged one side monitor and plugged it back in, no change. I have updated the DisplayLink drivers (now on 9.1.1644.0 according to the Display Manager Properties for my two Display Manager/Display adapters/"Dell USB3.0 Dock" entries), but the DisplayLink System Tray says I'm running 8.3.2938.0 so I'm confused) and the system passesCompatabilityCheck8.2M1. It's very frustrating. I hope DL responds to you! Last edited by wstidolph; 11-15-2019 at 08:34 PM.