Ubuntu: Dual monitor connected to hdmi port not detecting on Dell Vostro 3750



Question:

I am using Dell Vostro 3750 laptop with 2 monitors. OS Kubuntu 13.04

1 monitor I connected with VGA and it is working fine. But another monitor connected to HDMI port is not detected. I connected HDMI monitor to my friends laptop having Windows 7 and it works fine. but only with Ubuntu it is not working.

lspci -v output

01:00.0 VGA compatible controller: NVIDIA Corporation GF108M [GeForce GT 525M] (rev a1) (prog-if 00 [VGA controller])          Subsystem: Dell Device 04c6          Flags: bus master, fast devsel, latency 0, IRQ 16          Memory at f0000000 (32-bit, non-prefetchable) [size=16M]          Memory at c0000000 (64-bit, prefetchable) [size=256M]          Memory at d0000000 (64-bit, prefetchable) [size=32M]          I/O ports at 4000 [size=128]          Expansion ROM at f1000000 [disabled] [size=512K]          Capabilities: [60] Power Management version 3          Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+          Capabilities: [78] Express Endpoint, MSI 00          Capabilities: [b4] Vendor Specific Information: Len=14 <?>          Capabilities: [100] Virtual Channel          Capabilities: [128] Power Budgeting <?>          Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1 Len=024 <?>          Kernel driver in use: nvidia          Kernel modules: nvidia_current_updates, nvidia, nouveau, nvidiafb    00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller])          Subsystem: Dell Device 04c6          Flags: bus master, fast devsel, latency 0, IRQ 51          Memory at f1400000 (64-bit, non-prefetchable) [size=4M]          Memory at e0000000 (64-bit, prefetchable) [size=256M]          I/O ports at 5000 [size=64]          Expansion ROM at <unassigned> [disabled]          Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-          Capabilities: [d0] Power Management version 2          Capabilities: [a4] PCI Advanced Features          Kernel driver in use: i915          Kernel modules: i915  

xrandr output

xrandr  Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 32767 x 32767  LVDS1 connected (normal left inverted right x axis y axis)     640x480        59.9    VGA1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 531mm x 298mm     1920x1080      60.0*+     1680x1050      60.0       1600x900       60.0       1280x1024      75.0     60.0       1280x800       59.8       1152x864       75.0       1280x720       60.0       1024x768       75.1     60.0       832x624        74.6       800x600        75.0     60.3       640x480        75.0     60.0       720x400        70.1    

Any help would be appreciated.


Solution:1

Select Applications->System Tools->System Settings->Displays

It should show you two Monitors and one laptop.

Click on Laptop and Select Off. Select Other two Monitors and select On. Click Apply.

http://s24.postimg.org/p1w3tyo5h/Screenshot_from_2013_04_28_09_36_06.png


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