When I press Ctrl + Alt + L and my screen locks, after some time goes by my external monitor (Lenovo) seems to fall into a deep sleep, from which it doesn't wake, when I press Enter and type my password into my lock screen.

How can I figure out what's going on, and inspire my external monitor to awaken when summoned?


I have the same problem with my Lenovo (docking station). Workaround is to go to displays and change settings (e.g. activate Mirroring) and then the external monitors wake up, but then I have to rearrange all my windows.

Would like to know the root case of this.

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