Fedora 17 and Xephyr
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  1. #1
    Join Date
    Aug 2012
    Location
    switzerland
    Posts
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    Fedora 17 and Xephyr

    Hi everyone, I hope, I'm in the right forum.
    I must say, that I'm a noob when it comes to fedora linux and Xephyr.
    I have a problem with a dual screen setup under X. The first monitor is a touch screen, where everything is setup accordingly. The second one is a small lcd display, which is used for advertising. Since that computer uses a 2nd Generation Intel Integrated Graphics Controller (kernel module i915) two problems occur:

    - After reading [1], I can't define two separate xscreens in xorg, because the driver does not support it.
    - Since there is one xscreen for both physical monitors, the touchscreen dimensions are enlarged to the second monitor, which leads to a wrong cursor position when touching the screen

    I also have tested, or in better words, tried to test the xaphodmode, but intel also removed the xaphodmode support from it's drivers. This is why I need to accomplish my solution with Xephyr.

    For clarifying my wanted setup, I will describe the requirements.

    When I boot the system, I want to start an Xserver with two Xephyr instances in it, one for each monitor. The monitor connected to VGA1 is a small 9" monitor which displays a video or a slideshow with advertisements. It does not need any controlling devices, such as a keyboard or a mouse. The main monitor connected to LVDS should then start the default loginmanager for XFCE, so the user is able to log in.

    Now here is what I tried to do:
    - Start Fedora 17 to the multi-user runlevel.
    - configuring xorg for one big virtual screen spanning over the two monitors.
    - configuring the .xinitrc file for the use with startx.

    my xorg configuration:
    Code:
    [root@host ~]# for x in /usr/share/X11/xorg.conf.d/0*.conf ; do echo $x; cat $x; done
    /usr/share/X11/xorg.conf.d/01-serverlayout.conf
    Section "Serverflags"
        Option	"Xinerama" "on"
        Option	"ZapWarning" "on"
        Option	"AllowMouseOpenFail" "on"
        Option	"AIGLX" "on"
    EndSection
    
    Section "ServerLayout"
        Identifier  "Layout0"
        Screen      0 "Screen0"
        Screen      1 "Screen1" RightOf "Screen0"
        Option	"Xinerama" "on"
        Option	"Clone" "off"
        Option	"AutoEnableDevices" "false
        Option	"AutoAddDevices" "false"
        Option	"AllowEmptyInput" "true""
    EndSection
    
    /usr/share/X11/xorg.conf.d/02-device.conf
    Section "Device"
    	Identifier	"Card0"
    	Driver		"intel"
    	BusID		"PCI:0:2:0"
    	Option		"monitor-DP2" "Monitor0"
    	Option		"monitor-VGA1" "Monitor1"
    EndSection
    
    /usr/share/X11/xorg.conf.d/03-screens.conf
    Section "Screen"
        Identifier     "Screen0"
        Device	   "Card0"
        Monitor	   "Monitor0"
        DefaultDepth    24
        SubSection     "Display"
    	Modes	   "1366x768"
            Depth       24
    	Virtual	   2390 768
        EndSubSection
    EndSection
    
    /usr/share/X11/xorg.conf.d/04-monitor.conf
    Section "Monitor"
    	Identifier	"Monitor0"
    	Option		"Position"	"0 0"
    	Option		"DPMS"
    EndSection
    
    Section "Monitor"
    	Identifier	"Monitor1"
    	Option		"RightOf"	"Monitor0"
    	Option		"DPMS
    	Option		"Position"	"1366 0"
    EndSection
    
    /usr/share/X11/xorg.conf.d/05-extensions.conf
    Section "Extensions"
    	Option	"Composite"	"on"
    EndSection
    the startx script of my user (not root):
    Code:
    [user@host ~]$ cat .xinitrc 
    /bin/Xephyr :1 -screen 1366x768+0+0 -query localhost -keybd evdev,,device=/dev/input/event2 -mouse evdev,,device=/dev/input/event3,4 &
    export DISPLAY=:1
    DISPLAY=:1 xterm &
    
    /bin/Xephyr :2 -screen 1024x768+1366+0 -use-evdev &
    export DISPLAY=:2
    DISPLAY=:2 xterm &
    Since I do not have much expirience with fedora 17 and Xephyr, could someone provide me some information, tipps and tricks or assistance in configuring my desired setup? I would really apreciate any help i can get. I think I'm missing something or did not correctly understand the concept of Xephyr.

    If I did not provide all information needed to solve my problem, just ask and I will provide it.

    [1]http://lists.x.org/archives/xorg-dev...er/002498.html

  2. #2
    Join Date
    Aug 2012
    Location
    switzerland
    Posts
    2

    Re: Fedora 17 and Xephyr

    bump.
    does no one have any expirience on this topic? I would also take other solutions. At the moment, I'm trying to get the things done with an separate Xserver startet for each monitor, but I have some problems, because X allways automatically adds both monitors. this does also happen, when I define the following two directives in the ServerLayout:
    Code:
    Option   "AutoAddDevices" "false"
    Option   "AutoEnableDevices" "false"
    any suggestion or tipp on how to have two separate screens for each monitor would be appreciated.

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