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I have an HP Pavillion dm4 with intel core i5.

I'm trying to get my second screen going but whenever I plug it in, nothing happens. The display settings don't recognize the second output either.

I looked at this answer but it's for Atom chipsets...

Please help.

$ lsmod | grep video
uvcvideo               72627  0 
videodev               98259  1 uvcvideo
v4l2_compat_ioctl32    17128  1 videodev
video                  19651  1 i915
$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 02)
01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Robson CE [AMD Radeon HD 6300 Series]
$ lspci | grep HDMI
01:00.1 Audio device: Advanced Micro Devices [AMD] nee ATI Cedar HDMI Audio [Radeon HD 5400/6300 Series]
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2 Answers 2

As I looked up your computer, it's about a laptop.

In my case I use following command: xrandr --output LVDS1 --right-of HDMI1 --auto

My xrandr output:

$ xrandr Screen 0: minimum 8 x 8, current 1366 x 768, maximum 32767 x 32767 LVDS1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 309mm x 174mm 1366x768 60.0*+ 40.0 1360x768 59.8 60.0 1024x768 60.0 800x600 60.3 56.2 640x480 59.9 DP1 disconnected (normal left inverted right x axis y axis) HDMI1 disconnected (normal left inverted right x axis y axis) VGA1 disconnected (normal left inverted right x axis y axis) VIRTUAL1 disconnected (normal left inverted right x axis y axis)

Hopefully it helps.

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you have to activate or on it. so that it can have the signal. I mean open your terminal and type as

xrandr --output VGA1 --right-of HDMI1 --auto

If its worked for you, add it to autostart. so that everytime system on . your Dual screen will be on.


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This didn't work here's the output warning: output VGA1 not found; ignoring – doodle-snoopy Aug 6 '13 at 13:31
try with VGA0 , – Raja Aug 6 '13 at 13:33
same result. added some more information in the edits above. – doodle-snoopy Aug 6 '13 at 13:40
ok look at this thread – Raja Aug 6 '13 at 13:47

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