Config to be able to switch X output between 2 video cards via ARandR/xrandr

Aleksei alex3kov at zoho.com
Wed Oct 26 16:17:46 UTC 2016


Hi,
My hardware setup is 2 video cards (1 integrated Intel, 1 discrete 
Nvidia). Intel is connected to a monitor via HDMI, Nvidia is connected 
to the same monitor via DVI. There's also internal monitor hard-wired to 
Intel via eDP-1 output (you can see it in attached files).

I want to have 2 available outputs in ARandR so I can e.g. switch X 
output from (Intel->HDMI) to (Nvidia->DVI) and then manually choose 
input port (DVI/HDMI) on the hardware monitor.

I'm starting X with just startx - disabled display manager to eliminate 
it as a factor.

Here's my lspci output:
[username at arch ~]$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 5500 
(rev 09)
02:00.0 VGA compatible controller: NVIDIA Corporation GP106 [GeForce GTX 
1060] (rev a1)

After reading various Xorg manuals I came up with attached Xorg config. 
Some options are adopted from nvidia-xconfig output. I have 2 entries 
for monitors, because I want it to run at 144Hz when signal comes from 
Nvidia and at 60Hz when signal comes from Intel (Intel card can't output 
144Hz).

This config behaves as follows:

 1. On boot video output (with text tty login) goes to Intel->HDMI
 2. I log in, run startx, HDMI screen goes black (but there's a HDMI
    signal - monitor does not power down)
 3. After switching input port to DVI on the monitor I see my usual
    Openbox session

The problem is that ARandR shows only DVI-D-0 as selectable output. 
Attached are xrandr outputs for various queries. Apparently outputs to 
Intel are "active" (marked with "*"), but I get only blank screen on them.

What should be fixed with this config (or something else) to be able to 
switch X output between (Intel->HDMI) and (Nvidia->DVI)?

-- 
/--Regards, Aleksei/
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Section "Module"
    Load           "dbe"
    Load           "extmod"
    Load           "type1"
    Load           "freetype"
    Load           "glx"
EndSection

Section "ServerLayout"
	Identifier "layout"
	Screen 0 "Screen0_nvidia" 0 0
	Inactive "IntelHD5500"
	#Screen 1 "Screen1_intel" RightOf "Screen0_nvidia"
	Option "Xinerama" "0"
EndSection

Section "Monitor"
    # HorizSync source: edid, VertRefresh source: edid
    Identifier     "Monitor144Hz"
    VendorName     "Unknown"
    ModelName      "AOC G2460"
    HorizSync       30.0 - 160.0
    VertRefresh     50.0 - 146.0
    Option         "DPMS"
EndSection

Section "Monitor"
    Identifier     "MonitorAuto"
    Option         "DPMS"
EndSection

Section "Device"
	Identifier "GTX1060"
	Driver "nvidia"
	VendorName "NVIDIA Corporation"
	BoardName "GeForce GTX 1060 6GB"	
	BusID "PCI:2:0:0"
EndSection

Section "Device"
	Identifier "IntelHD5500"
	Driver "modesetting"
	BusID "PCI:0:2:0"
EndSection

Section "Screen"
    Identifier     "Screen0_nvidia"
    Device         "GTX1060"
    Monitor        "Monitor144Hz"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "nvidiaXineramaInfoOrder" "DFP-0"
    Option         "metamodes" "1920x1080_144 +0+0"
    Option         "SLI" "Off"
    Option         "MultiGPU" "Off"
    Option         "BaseMosaic" "off"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

Section "Screen"
    Identifier     "Screen1_intel"
    Device         "IntelHD5500"
    Monitor        "MonitorAuto"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection
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[username at arch ~]$ xrandr --listproviders
Providers: number : 1
Provider 0: id: 0x1b9 cap: 0x1, Source Output crtcs: 4 outputs: 8 associated providers: 0 name:NVIDIA-0
[username at arch ~]$ xrandr --screen 0
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
DVI-D-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 531mm x 299mm
   1920x1080     60.00 + 144.00*  119.98    99.93  
   1680x1050     59.88  
   1440x900      59.90  
   1280x1024     75.02    60.02  
   1280x720      59.86  
   1024x768     119.99   100.00    75.03    70.07    60.00  
   800x600      119.97   100.00    75.00    72.19    60.32    56.25  
   640x480      120.01    99.99    75.00    72.81    59.94  
HDMI-0 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 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)
DP-4 disconnected (normal left inverted right x axis y axis)
DP-5 disconnected (normal left inverted right x axis y axis)
[username at arch ~]$ xrandr --screen 1
Screen 1: minimum 320 x 200, current 3286 x 1080, maximum 8192 x 8192
eDP-1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 309mm x 173mm
   1366x768      60.07*+  48.04  
   1024x768      60.04    60.00  
   960x720       60.00  
   928x696       60.05  
   896x672       60.01  
   800x600       60.00    60.32    56.25  
   700x525       59.98  
   640x512       60.02  
   640x480       60.00    59.94  
   512x384       60.00  
   400x300       60.32    56.34  
   320x240       60.05  
HDMI-1 connected 1920x1080+1366+0 (normal left inverted right x axis y axis) 531mm x 299mm
   1920x1080     60.00*+  50.00    59.94  
   1920x1080i    60.00    50.00    59.94  
   1680x1050     59.88  
   1280x1024     75.02    60.02  
   1440x900      59.90  
   1280x720      60.00    50.00    59.94  
   1024x768     119.99    99.97    75.03    70.07    60.00  
   832x624       74.55  
   800x600      119.97    99.99    72.19    75.00    60.32    56.25  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480      119.99   100.00    75.00    72.81    66.67    60.00    59.94  
   720x400       70.08  
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)


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