Good morning, This is kind of an odd setup I am doing. I am usually using 2 monitors, and want separate X screens for each, so :0.0 and :0.1, but if the 2nd monitor is not connected I do not want :0.1 to be created. Up until now I have been using the nvidia driver, which by default has an option "AllowEmptyInitialConfiguration" set to false, which prevents the :0.1 from being created when the 2nd monitor is not connected at startup. I would like to have this same behavior with the intel or modesetting driver and ZaphodHeads. I am currently using the intel driver on CentOS 7 since modesetting was tearing, but if need be I can probably switch to modesetting and turn on some other options to stop the tearing.
With the intel driver, if the 2nd monitor is disconnected, :0.1 is still created and is just a 1024x768 framebuffer. The main problem this is creating is the java application I am using still thinks there are 2 "monitors" available. It uses GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices() to determine the "number of monitors connected". The developer keeps insisting that I fix my OS setup to report the proper number of monitors connected. The 2nd monitor is used only for displaying a video, which is why I want it on another X screen; this way the mouse cannot move over there, and screenshots can be easily taken of each monitor separate. Any ideas? Note, I am not using a DE, but just running startx with xinitrc that starts a window manager (metacity). Below is my current xorg.conf. I tried experimenting with a couple other configurations, like removing all but the Device sections, and turning on Option "ReprobeOutputs", with no luck. It either never creates :0.1, or always does. Thanks, Dan Section "Device" Identifier "Videocard1" Driver "intel" BusID "PCI:0:2:0" Screen 0 Option "ZaphodHeads" "HDMI1" EndSection Section "Device" Identifier "Videocard2" Driver "intel" BusID "PCI:0:2:0" Screen 1 Option "ZaphodHeads" "HDMI2" EndSection Section "Monitor" Identifier "HDMI1" Option "PreferredMode" "1920x1080" EndSection Section "Monitor" Identifier "HDMI2" Option "PreferredMode" "1920x1080" EndSection Section "Screen" Identifier "screen1" Device "Videocard1" Monitor "HDMI1" EndSection Section "Screen" Identifier "screen2" Device "Videocard2" Monitor "HDMI2" EndSection Section "ServerLayout" Identifier "Default Layout" Screen 0 "screen1" Screen 1 "screen2" EndSection _______________________________________________ xorg@lists.x.org: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: https://lists.x.org/mailman/listinfo/xorg Your subscription address: %(user_address)s