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Excluding unwired display(s) output from Xorg init? [solved]
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CaptainBlood
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PostPosted: Thu Aug 04, 2022 2:33 pm    Post subject: Excluding unwired display(s) output from Xorg init? [solved] Reply with quote

xrandr returns:
Code:
DP-1 disconnected (normal left inverted right x axis y axis)
which is unwired here indeed, e.g. has no output plug. Intel intgrated GPU here.
Any way having Xorg to discard this device? ( i.e. in such a way it doesn't show up in Xorg.log anymore).

Thks 4 ur attention, interest & support.
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Last edited by CaptainBlood on Sun Aug 28, 2022 10:23 am; edited 4 times in total
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Blind_Sniper
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PostPosted: Sun Aug 28, 2022 8:23 am    Post subject: Reply with quote

I had the similar issue: Xorg.log show 3 monitors connected, though I have only one monitor. I just put this into xorg.conf:
Code:
Section "Monitor"
    Identifier "DP-1"
    Option "Ignore" "true"
EndSection

Section "Monitor"
    Identifier "HDMI-2"
    Option "Ignore" "true"
EndSection


There may be erroneous ports enumeration in xrandr output, so try different "Identifier" options
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CaptainBlood
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PostPosted: Sun Aug 28, 2022 10:11 am    Post subject: Reply with quote

Interesting...
Once patched for DP-1 here, this device is excluded when xorg-server initializes, i.e.
Code:
[    54.010] (II) modeset(0): Output DP-1 using monitor section DP-1
[    54.010] (**) modeset(0): Option "Ignore" "true"
which avoids latter previously reported EDID resolution for the same device, i.e.
Code:
[    48.502] (II) modeset(0): EDID for output DP-1
[    48.502] (II) modeset(0): Output HDMI-1 connected
...
[    48.502] (II) modeset(0): Output DP-1 disconnected
In this respect, xrandr doesn't refer to DP-1 anymore; which is nice :).

Is there any benefit beyond leaner logs and command output, I can't tell.
xorg-server doesn't seem to load any faster enough to impact user experience.
Could be that memory usage being marginally reduced though.
Same for log files.

Thks 4 ur attention, interest & support.
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USE="-* ..." in /etc/portage/make.conf here.
LT: "I've been doing a passable imitation of the Fontana di Trevi, except my medium is mucus. Sooo much mucus. "
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Blind_Sniper
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PostPosted: Sun Aug 28, 2022 11:05 am    Post subject: Reply with quote

CaptainBlood wrote:

Is there any benefit beyond leaner logs and command output, I can't tell.
xorg-server doesn't seem to load any faster enough to impact user experience.


I used this option exactly for reducing boot time, it helped a lot in terms of booting faster.
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CaptainBlood
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PostPosted: Sun Aug 28, 2022 4:04 pm    Post subject: Reply with quote

Out of curiosity, do you initrc, systemd, initramfs?

Thks 4 ur attention, interest & support.
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Blind_Sniper
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PostPosted: Sun Aug 28, 2022 7:49 pm    Post subject: Reply with quote

openrc, and no initramfs here
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