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Date:      Sat, 20 Jan 2018 12:56:36 +0100
From:      Polytropon <freebsd@edvax.de>
To:        Per olof Ljungmark <peo@nethead.se>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: xfce4 reverts to mirrored dislays
Message-ID:  <20180120125636.6ad88128.freebsd@edvax.de>
In-Reply-To: <c89fe0ea-d072-2a4b-ad02-74041e3bd181@nethead.se>
References:  <c89fe0ea-d072-2a4b-ad02-74041e3bd181@nethead.se>
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On Sat, 20 Jan 2018 12:19:14 +0100, Per olof Ljungmark wrote:
> FreeBSD 11.1-STABLE #0 r326044
> nvidia-driver-384.98
> xfce4-settings-4.12.1
> 
> File
> .config/xfce4/xfconf/xfce-perchannel-xml/displays.xml
> 
> Problem
> 
> I use a dual monitor setup with "<property name="X" type="int"
> value="1920"/>", ie. with the second monitor 1920px to the right
> 
> On every monitor power down, xfce4 decides that they are mirrored
> instead and changes the file displays.xml to value="0" for the right
> monitor and the file is overwritten.
> 
> Tried
> 
> - Setting ownership to the above file to root
> - Set the propery <channel name="displays" version="1.0"> to "locked"
> - Applied this patch to xfce4-settings-4.12.1:
> https://bugzilla.xfce.org/show_bug.cgi?id=14096
> https://git.xfce.org/xfce/xfce4-settings/commit?id=e128126f5e32c1018854403bb846cb9d6a091bb0
> - "metamodes" "DP-2: nvidia-auto-select +0+0, DP-3: nvidia-auto-select
> +1920+0" in xorg.conf (ignored by xfce apparently)
> - nvidia-settings
> - nvidia-xconfig
> 
> .xinitrc has just "/usr/local/bin/startxfce4"
> 
> None of the above changes the behaviour and I am out of ideas how to fix.
> 
> Are there other files I am unaware of that could override displays.xml?
> 
> Thankful for any hints on the subject...

You should be able to set "hard-coded defaults" in xorg.conf
or, as it is done today, in a file in the /usr/local/etc/xorg.conf.d
subdirectory. I'm not using a dual-screen setup at the moment,
but I did with two 21" CRTs (4:3) on a nVidia GeForce GPU. Here
is an example from the /etc/X11/xorg.conf file that could offer
some inspiration:



Section "ServerLayout"
	Identifier	"Layout0"
	InputDevice	"Mouse0"		"CorePointer"
	InputDevice	"Keyboard0"		"CoreKeyboard"
	Option		"DontZap"		"false"
	Screen	0	"Screen0"		0 0
	Screen	1	"Screen1"	LeftOf 	"Screen0"
	Option		"Xinerama"		"on"
EndSection

Section "ServerFlags"
	Option		"DontVTSwitch"		"false"
	Option		"DontZoom"		"false"
	Option		"Xinerama"		"true"
	Option		"AIGLX"			"true"
EndSection

Section "Monitor"
	Identifier	"Monitor0"
	VendorName	"Eizo"
	ModelName	"FlexScan F980"
	HorizSync	30.0 - 137.0
	VertRefresh	50.0 - 160.0
	Option		"DPMS"			"false"
	DisplaySize	410 305
EndSection

Section "Monitor"
	Identifier	"Monitor1"
	VendorName	"Eizo"
	ModelName	"FlexScan F77S"
	HorizSync	30.0 - 137.0
	VertRefresh	50.0 - 160.0
	Option		"DPMS"			"false"
	DisplaySize	410 305
EndSection

Section "Device"
	Identifier	"Card0"
	Driver		"nvidia"
	VendorName	"nVidia Corporation"
	BoardName	"G73 [GeForce 7600 GS]"
	BusID		"PCI:2:0:0"
	Screen		0
	Option		"NvAGP"			"3"
	Option		"UseEdid"		"FALSE"
	Option		"UseEdidDpi"		"FALSE"
	Option		"DPI"			"96 x 96"
EndSection

Section "Screen"
	Identifier	"Screen0"
	Device		"Card0"
	Monitor		"Monitor0"
	DefaultDepth	24
	SubSection "Display"
		Viewport	0 0
		Depth		24
		Visual		"TrueColor"
		Modes		"1400x1050" "1152x864" "1024x768" "800x600" "640x480" "320x240"
	EndSubSection
	Option		"TwinView"
	Option		"TwinViewOrientation"	"LeftOf"
	Option		"ConnectedMonitor"	"CRT, CRT"
EndSection



You will need to experiment with those settings. As I said,
this stuff was written a long time ago, for very special
hardware... ;-)



-- 
Polytropon
Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...

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