Good day! Faced such a problem, I can not connect the 3rd monitor on Ubuntu 16.04 with native Nvidia 3xx drivers.
Two monitors (on one video card) are recognized and working, and the third (second video card) is not recognized.
The cards are connected by an SLI bridge.
Setup :
- Acer G246HYL (1920x1080) | x3
- Nvidia GTX780 | x2
- Ubuntu 16.04
- Nvidia drivers 361.42
I understand that the problem is most likely with xconf, but my knowledge is critically lacking (therefore I will ask you to chew on it like a fool). If this doesn’t bother you, please write the required config for xconf.
xorg.conf : Generen nvidia-xconfig
# nvidia-xconfig: X configuration file generated by nvidia-xconfig # nvidia-xconfig: version 361.42 (buildmeister@swio-display-x64-rhel04-13) Tue Mar 22 18:37:28 PDT 2016 Section "ServerLayout" Identifier "Layout0" Screen 0 "Screen0" InputDevice "Keyboard0" "CoreKeyboard" InputDevice "Mouse0" "CorePointer" 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" Identifier "Monitor0" VendorName "Unknown" ModelName "Unknown" HorizSync 28.0 - 33.0 VertRefresh 43.0 - 72.0 Option "DPMS" EndSection Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" EndSection Section "Screen" Identifier "Screen0" Device "Device0" Monitor "Monitor0" DefaultDepth 24 SubSection "Display" Depth 24 EndSubSection EndSection nvidia-xconfig --query-gpu-info
Number of GPUs: 2 GPU #0: Name : GeForce GTX 780 UUID : GPU-11111111-2222-3333-4444-555555555555 PCI BusID : PCI:1:0:0 Number of Display Devices: 2 Display Device 0 (TV-0): EDID Name : Acer G246HYL Minimum HorizSync : 31.000 kHz Maximum HorizSync : 75.000 kHz Minimum VertRefresh : 56 Hz Maximum VertRefresh : 75 Hz Maximum PixelClock : 180.000 MHz Maximum Width : 1920 pixels Maximum Height : 1080 pixels Preferred Width : 1920 pixels Preferred Height : 1080 pixels Preferred VertRefresh : 60 Hz Physical Width : 530 mm Physical Height : 300 mm Display Device 1 (TV-3): EDID Name : Acer G246HYL Minimum HorizSync : 31.000 kHz Maximum HorizSync : 75.000 kHz Minimum VertRefresh : 56 Hz Maximum VertRefresh : 75 Hz Maximum PixelClock : 180.000 MHz Maximum Width : 1920 pixels Maximum Height : 1080 pixels Preferred Width : 1920 pixels Preferred Height : 1080 pixels Preferred VertRefresh : 60 Hz Physical Width : 530 mm Physical Height : 300 mm GPU #1: Name : GeForce GTX 780 UUID : GPU-66666666-7777-8888-9999-000000000000 PCI BusID : PCI:2:0:0 Number of Display Devices: 1 Display Device 0 (TV-0): EDID Name : Acer G246HYL Minimum HorizSync : 31.000 kHz Maximum HorizSync : 75.000 kHz Minimum VertRefresh : 56 Hz Maximum VertRefresh : 75 Hz Maximum PixelClock : 180.000 MHz Maximum Width : 1920 pixels Maximum Height : 1080 pixels Preferred Width : 1920 pixels Preferred Height : 1080 pixels Preferred VertRefresh : 60 Hz Physical Width : 530 mm Physical Height : 300 mm lspci -k :
00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller (rev 06) Subsystem: Gigabyte Technology Co., Ltd Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller Kernel driver in use: i915 -- 01:00.0 VGA compatible controller: NVIDIA Corporation GK110 [GeForce GTX 780] (rev a1) Subsystem: Gigabyte Technology Co., Ltd GK110 [GeForce GTX 780] Kernel driver in use: nvidia -- 02:00.0 VGA compatible controller: NVIDIA Corporation GK110 [GeForce GTX 780] (rev a1) Subsystem: Gigabyte Technology Co., Ltd GK110 [GeForce GTX 780] Kernel driver in use: nvidia 