https://faq.i3wm.org/questions/Frequently asked questions and answers about the i3 window managerenCopyright i3, 2012Mon, 03 Aug 2015 22:42:16 +0000https://faq.i3wm.org/question/5362/3-monitors-2-nvidia-cards-how-to-setup-without-xinerama/Hi all, I have 3 monitors and 2 nvidia cards attached to my computer at work. I can obtain 3 separate X screens and run 3 separate sessions of i3 using the DISPLAY=$DISPLAY i3 & trick, but I would like to have it so I am only running one session of i3 that sees all the monitors and still treats them independently. So far, I I have only been able to achieve this by turning on Xinerama and using the --force-xinerama option, but that isn't a solution because it kills 3d acceleration. I am also stuck using the prop. drivers because nouveau doesn't have support for OpenCL, which I also use. Following are my .xinitrc, xorg.conf, and xrandr output. Would someone be willing to take a look and help me figure out if you can do this? I thought you would be able to by RANDR 1.4. I have been using i3 on my laptop and think it is fantastic, I would really like to use it at work as well. Thanks! .xinitrc xscreensaver -nosplash & udiskie & CURRENT_DISPLAY=(`echo $DISPLAY | tr '.' ' '`) ( xcompmgr -CcFf &>/dev/null ) & ( xcompmgr -CcFf -d ${CURRENT_DISPLAY}.1 &>/dev/null ) & ( xcompmgr -CcFf -d ${CURRENT_DISPLAY}.2 &>/dev/null ) & #exec i3 -V >> i3.log 2>&1 DISPLAY=:0.0 i3 & DISPLAY=:0.1 i3 & DISPLAY=:0.2 i3 xorg.conf Section "ServerLayout" Identifier "Layout0" Screen 0 "Screen0" 1920 0 Screen 1 "Screen1" LeftOf "Screen0" Screen 2 "Screen2" RightOf "Screen0" InputDevice "Keyboard0" "CoreKeyboard" InputDevice "Mouse0" "CorePointer" Option "Xinerama" "0" EndSection Section "Files" EndSection Section "InputDevice" # generated from default Identifier "Mouse0" Driver "mouse" Option "Protocol" "auto" Option "Device" "/dev/psaux" Option "Emulate3Buttons" "no" Option "ZAxisMapping" "4 5" EndSection Section "InputDevice" # generated from default Identifier "Keyboard0" Driver "kbd" EndSection Section "Monitor" # HorizSync source: edid, VertRefresh source: edid Identifier "Monitor0" VendorName "Unknown" ModelName "HP ZR30w" HorizSync 49.3 - 98.7 VertRefresh 59.9 - 60.0 Option "DPMS" EndSection Section "Monitor" # HorizSync source: edid, VertRefresh source: edid Identifier "Monitor1" VendorName "Unknown" ModelName "HP LP2465" HorizSync 30.0 - 94.0 VertRefresh 48.0 - 85.0 Option "DPMS" EndSection Section "Monitor" # HorizSync source: edid, VertRefresh source: edid Identifier "Monitor2" VendorName "Unknown" ModelName "hp L2335" HorizSync 30.0 - 94.0 VertRefresh 48.0 - 85.0 Option "DPMS" EndSection Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "Quadro 2000" BusID "PCI:5:0:0" EndSection Section "Device" Identifier "Device1" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "Quadro FX 1700" BusID "PCI:4:0:0" Screen 0 EndSection Section "Device" Identifier "Device2" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "Quadro FX 1700" BusID "PCI:4:0:0" Screen 1 EndSection Section "Screen" Identifier "Screen0" Device "Device0" Monitor "Monitor0" DefaultDepth 24 Option "Stereo" "0" Option "nvidiaXineramaInfoOrder" "DFP-4" Option "metamodes" "nvidia-auto-select +0+0" Option "SLI" "Off" Option "MultiGPU" "Off" Option "BaseMosaic" "off" SubSection "Display" Depth 24 EndSubSection EndSection Section "Screen" Identifier "Screen1" Device "Device1" Monitor "Monitor1" DefaultDepth 24 Option "Stereo" "0" Option "metamodes" "DVI-I-2: nvidia-auto-select +0+0" Option "SLI" "Off" Option "MultiGPU" "Off" Option "BaseMosaic" "off" SubSection "Display" Depth 24 EndSubSection EndSection Section "Screen" Identifier "Screen2" Device "Device2" Monitor "Monitor2" DefaultDepth 24 Option "Stereo" "0" Option "metamodes" "DVI-I-3: nvidia-auto-select +0+0" Option "SLI" "Off" Option "MultiGPU" "Off" Option "BaseMosaic" "off" SubSection "Display" Depth 24 EndSubSection EndSection xrandr --screen 0 Screen 0: minimum 8 x 8, current 2560 x 1600, maximum 16384 x 16384 DVI-I-0 disconnected (normal left inverted right x axis y axis) DVI-I-1 disconnected (normal left inverted right x axis y axis) DP-0 disconnected (normal left inverted right x axis y axis) DP-1 disconnected (normal left inverted right x axis y axis) DP-2 connected 2560x1600+0+0 (normal left inverted right x axis y axis) 641mm x 400mm 2560x1600 59.97*+ 1280x800 59.91 DP-3 disconnected primary (normal left inverted right x axis y axis) xrandr --screen 1 Screen 1: minimum 8 x 8, current 1920 x 1200, maximum 16384 x 16384 DVI-I-0 disconnected primary (normal left inverted right x axis y axis) DVI-I-1 disconnected (normal left inverted right x axis y axis) DP-1 connected 1920x1200+0+0 (normal left inverted right x axis y axis) 519mm x 324mm 1920x1200 59.95*+ 1680x1050 59.95 1600x1200 60.00 1600x1000 60.00 1280x1024 85.02 75.02 60.02 1280x960 60.00 1152x720 60.00 1024x768 75.03 60.00 800x600 75.00 60.32 640x480 75.00 59.94 DP-2 disconnected (normal left inverted right x axis y axis) DP-3 disconnected (normal left inverted right x axis y axis) xrandr --screen 2 Screen 2: minimum 8 x 8, current 1920 x 1200, maximum 16384 x 16384 DP-0 connected primary 1920x1200+0+0 (normal left inverted right x axis y axis) 519mm x 324mm 1920x1200 59.95*+ 1680x1050 59.95 1600x1200 60.00 1600x1000 60.00 1280x1024 85.02 75.02 60.02 1280x960 60.00 1152x720 60.00 1024x768 75.03 60.00 800x600 75.00 60.32 640x480 75.00 59.94 So far, as I said, the only solutions have been to turn on Xinerama and use the force option - otherwise, I can't seem to get it to work. Thanks for any suggestions / help!Tue, 20 Jan 2015 22:12:34 +0000https://faq.i3wm.org/question/5362/3-monitors-2-nvidia-cards-how-to-setup-without-xinerama/https://faq.i3wm.org/question/5362/3-monitors-2-nvidia-cards-how-to-setup-without-xinerama/?comment=5364#comment-5364Sorry - I keep forgetting not everyone uses the same version of stuff as me. Running Gentoo (rolling), Nvidia Drivers 346.22, i3 4.8. And, that is a good idea - I have had the xorg configs so long, it never occured I might not need them or could pare them back. I'll try that and write back..Wed, 21 Jan 2015 16:19:22 +0000https://faq.i3wm.org/question/5362/3-monitors-2-nvidia-cards-how-to-setup-without-xinerama/?comment=5364#comment-5364https://faq.i3wm.org/question/5362/3-monitors-2-nvidia-cards-how-to-setup-without-xinerama/?comment=5363#comment-5363I think a bit more information is needed: Which distribution and version thereof are you using? Nvidia driver version? i3 version? Also, have you tried to start X without an `xorg.conf` (that includes any files below `/etc/xorg.conf.d`)?Wed, 21 Jan 2015 06:42:09 +0000https://faq.i3wm.org/question/5362/3-monitors-2-nvidia-cards-how-to-setup-without-xinerama/?comment=5363#comment-5363https://faq.i3wm.org/question/5362/3-monitors-2-nvidia-cards-how-to-setup-without-xinerama/?answer=5457#post-id-5457I have similar situation.... 4 monitors with 2 nvidia cards. Appears that by default an X screen can only use displays on the same card. Xinerama would work - but be in conflict with xrandr you can also enable base mosaic mode in the nvidia driver. Run nvidia-settings - and select advanced button - this makes "Enable Base Mosaic" available in the X server Display Config enable that and set all displays to be on X screen 0 Appears to be working well - no crashing - can move windows between all monitors /workspaces OS: Centos7 - Nvidia driver ver: 346.35 - i3 ver: 4.6 Fri, 13 Feb 2015 22:21:58 +0000https://faq.i3wm.org/question/5362/3-monitors-2-nvidia-cards-how-to-setup-without-xinerama/?answer=5457#post-id-5457https://faq.i3wm.org/question/5362/3-monitors-2-nvidia-cards-how-to-setup-without-xinerama/?comment=6387#comment-6387I don't have the points to upvote, but "Enable Basic Mosaic" did the trick for me.Mon, 03 Aug 2015 22:42:16 +0000https://faq.i3wm.org/question/5362/3-monitors-2-nvidia-cards-how-to-setup-without-xinerama/?comment=6387#comment-6387