What were you trying to do that didn't work?

Login to GNOME desktop from gdm, while external screen (LG 22" via HDMI) is the only configured display (built-in screen is off).

What is the impact of this issue to you?

I cannot work with the desktop while the external screen is off. It takes a long time (cca 5 to 20 minutes) before the screen turns on. Workaround: close and open the laptop lid, then picture on external screen appears immediately.

Please provide the package NVR for which the bug is seen:

mutter-49.4-1.el10.x86_64

gnome-shell-49.1-9.el10.x86_64

How reproducible is this bug?:

Always.

Steps to reproduce

1. Open the laptop lid and connect an external screen (via HDMI)
2. In Settings -> Displays, configure the external screen (via HDMI) as the primary display and turn the built-in display off.
3. Log out from GNOME.
4. Log-in to GNOME again. 

Expected results

GNOME session should start for the logged-in user, using the external screen as the only display.

Actual results

GNOME session starts, but the external screen stays black for takes cca 5 - 15 minutes.

Notes:

1. My laptop is Lenovo ThinkPad P16v, CPU: AMD Ryzen 7 PRO 7840HS, GPU: AMD Radeon 780M Graphics
2. When I try to log in with laptop lid closed, system susspends (goes to sleep) instead of showing desktop.
3. If built-in screen is configured to be used (turned on) together with external screen, both displays are available immediately after login.