Comment # 41 on bug 1193397 from Felix Miata

(In reply to Kourosh P. from comment #40)
> I have reported this matter at the following link:
> https://gitlab.freedesktop.org/drm/amd/-/issues/1952

I just made the following addition there:

# inxi -S
System:
  Host: ab250 Kernel: 5.18.19-200.fc36.x86_64 arch: x86_64 bits: 64
    Desktop: Trinity v: R14.0.12 Distro: Fedora release 36 (Thirty Six)
#

If I keep my second display's cable disconnected, I get this:
# grep onnec /var/log/Xorg.0.log
[     5.313] (II) modeset(0): Output DP-1 connected
[     5.313] (II) modeset(0): Output HDMI-1 disconnected
[     5.313] (II) modeset(0): Output HDMI-2 disconnected
[     5.313] (II) modeset(0): Output HDMI-3 disconnected
[     5.313] (II) modeset(0): Output DP-2 disconnected
#
Or this:
# grep onnec /var/log/Xorg.0.log
[     5.544] (II) modeset(0): Output DP-1 disconnected
[     5.544] (II) modeset(0): Output HDMI-1 disconnected
[     5.544] (II) modeset(0): Output HDMI-2 connected
[     5.544] (II) modeset(0): Output HDMI-3 disconnected
[     5.544] (II) modeset(0): Output DP-2 disconnected
#

It may surprise many that if I keep my second display's signal cable connected
from the PC, but with it powered off, I get this on booting instead:
# grep onnec /var/log/Xorg.0.log
[     5.412] (II) modeset(0): Output DP-1 connected
[     5.412] (II) modeset(0): Output HDMI-1 disconnected
[     5.412] (II) modeset(0): Output HDMI-2 connected
[     5.412] (II) modeset(0): Output HDMI-3 disconnected
[     5.412] (II) modeset(0): Output DP-2 disconnected
#
Or this:
# grep onnec /var/log/Xorg.0.log
[     5.451] (II) modeset(0): Output DP-1 connected
[     5.451] (II) modeset(0): Output HDMI-1 disconnected
[     5.451] (II) modeset(0): Output HDMI-2 connected
[     5.451] (II) modeset(0): Output HDMI-3 disconnected
[     5.451] (II) modeset(0): Output DP-2 disconnected
#

So, at "connection" time, the secondary display isn't providing any information
about it's capability, only the cable connection is "reporting" something is
connected. Some may want to rethink their definition of "connected", and not
boot
with an external display attached but un-powered.[/quote]

It would be nice to know what MX Linux is doing that it doesn't present the
problem.