Acer Nitro V AN-515-55 - External monitor does not wake wake up on exit from sleep/blanked-screen

MarcusJohansson

So as the title suggests I have an issue where my monitor doesn't wake up on exit from eg. sleep mode.

Notebook: Acer Nitro V AN-515-55 - NH.Q7QED.007
    BIOS: V1.08
    Windows 10 64bit 20H2
    Nvidia 457.30
    Intel Graphics 27.20.100.8935
    
External monitor: Svive PYX34C601 34" panel running over HDMI @ ~100hz

So I'll give a small scenario to replicate the issue:

1. The external monitor is on and shows output.
2. I put the notebook to sleep
3. Notebook and external Monitor starts sleeping
4. I wake up the notebook by pressing the power button
5. The notebook wakes up, the external monitor wakes up.
6. I see windows output on the Notebook monitor, but the external monitor shows no output, it displays "NO SIGNAL", and goes into sleep mode again. 
   
7. I restart the external monitor
8. The external monitor shows output

I tried using:

• 2 different Nvidia drivers off the Acer page
• 2 intel drivers off the Acer page
• Latest Intel driver
• Latest Nvidia driver

Turned off link-state energy management in power scheme settings.
Tried 2 different HDMI cables, tried without a USB-C hub, encountered the same issue.

The monitor works on my 2 Dell machines and my Asus machine, all notebooks:

• Dell 1: Windows - Native HDMI
• Dell 2: Ubuntu 20.04 - Over USB-C hub adapter
• Asus: Ubuntu 20.04 - Native HDMI

I have narrowed this down to an Acer specific issue as I cannot find anything else that fixes this problem.
Please help

MarcusJohansson

Anyone?