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Dear developers,

The predicament is: 
If the monitor is OFF since the booting of the system and letting the X-server
load (around 20-30 second since boot) then turning the monitor ON, the display
shows 'DisplayPort NO Signal', have to change to console 1 (CTRL+ALT+F1) to
gain command line, and monitor comes ON. Login, either reboot the system and
LEAVE the monitor ON the whole time, or startx to get to Display Manager.
I have tested my system with Tumbleweed (on a test SSD) and got the same
problem. But installed MX Linux 21 and the problem wasn't there any more. I
could leave the monitor OFF, start my computer, after 20-30 seconds turn ON the
monitor and I would see the desktop ready and loaded. Same thing would result
in no signal with openSUSE Leap or TW. So I think it is something that happens
with openSUSE. I even tested with HDMI cable.
On the openSUSE forum I have some journalctl and Xorg.0.log that I hope could
help pinpoint the matter.


Reproducible: Always

Steps to Reproduce:
1. Leave monitor OFF
2. Start the PC with monitor OFF
3. Wait about 20-30 seconds (so X-server is loaded) and turn the monitor ON
3. No signal is received by the monitor (HDMI nor DisplayPort) on console 7
4. Change to console 1, 2, 3 or.... Monitor will no show the login command on
the respective console
Actual Results:  
No signal is received by the monitor (HDMI nor DisplayPort) on console 7 unless
change to console 1, 2, 3 or.... Monitor will no show the login command on the
respective console

Expected Results:  
The monitor should receive signal from the X-server and show the fully loaded
desktop

ASUSTeK PRIME Z490-A - UEFI: American Megatrends v: 2301 - Intel Core i7-10700K
- Device-1: Advanced Micro Devices [AMD/ATI] Navi 21 [Radeon RX 6800/6800 XT /
6900 XT] driver: amdgpu v: kernel Display: x11 server: X.org 1.20.3 driver:
amdgpu,ati unloaded: fbdev,modesetting,radeon,vesa

The thread that this issue has been discussed on:
https://forums.opensuse.org/showthread.php/563022-X-won-t-show-anything-if-the-monitor-hasn-t-been-on-since-system-boot-Monitor-blank-on-console-7th