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setting up dual monitors

asked 2012-04-14 10:09:07 -0500

mchl gravatar image

updated 2014-09-30 11:06:52 -0500

mether gravatar image

hi there, I just installed fedora 16 on my HP envy laptop(ati graphics card) with an external monitor connected to the HDMI out. At startup the filling Fedora logo shows up on the external monitor, however from login screen on everything is shown on the small laptop screen only. I did already google a lot but can't find a way to get output on the external monitor inside X. could you give me any hints how to get a picture on the external screen?

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answered 2012-04-18 12:00:59 -0500

Naga Kiran gravatar image

"lxrandr" utility allows you to choose the display [external monitor/laptop],resolution and refresh rate.

You can install the utility using yum and the command is "yum install lxrandr"

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answered 2012-12-07 12:16:47 -0500

ThomasMcA gravatar image

The monitor must be turned on and plugged into the computer before launching lxrandr.

Another option is to use xrandr. Plug in the monitor, and run xrandr from a console. It will list which monitor devices it sees, and their supported resolutions. On my system, my laptop is LVDS and my Dell monitor is CRT2. The following command enables dual-head, with the monitor to the right of the laptop. My mouse then jumps off the laptop screen on the right side, and comes into the monitor from its left side.

xrandr --output LVDS --mode 1680x1050 --output CRT2 --mode 1680x1050 --right-of LVDS

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answered 2015-04-03 15:58:33 -0500

andrej gravatar image

updated 2015-04-07 11:12:02 -0500

1) detect hw params xrandr | grep connected

LVDS-0 connected 1440x900+0+0 (normal left inverted right x axis y axis) 304mm x 190mm
VGA-0 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 376mm x 301mm
DVI-0 disconnected (normal left inverted right x axis y axis)

2) setup screens

xrandr --output LVDS-0 --mode 1440x900 --output VGA-0 --mode 1280x1024 --left-of LVDS-0

3) move first panel (list of running programs, virtual desktops, clock, ...) to LVDS-0 screen Right click on the Panel and select Panel preferences... In Display tab there is Output combo box with Auto, VGA-0 and LVDS-0 options. Choose LVDS-0 if you want to have it on the laptop screen. In Auto mode the panel is placed on the left screen.

The setting is saved into ~/.config/xfce4/xfconf/xfce-perchannel-xml/xfce4-panel.xml

<channel name="xfce4-panel" version="1.0">
  <property name="panels" type="array">
    <property name="panel-1" type="empty">
      <property name="output-name" type="string" value="LVDS-0"/>

The problem is that I am not able to move left VGA screen to be aligned to something else than the top of LVDS screen.

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answered 2012-12-07 11:48:00 -0500

chandank gravatar image

lxrandr did not help. I am using F17 on Lenovo W520 and I just cant get external display work

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Is there any solution ? I am also facing the same issue .

vimal3271 gravatar imagevimal3271 ( 2013-07-02 01:47:02 -0500 )edit

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Asked: 2012-04-14 10:09:07 -0500

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Last updated: Apr 07 '15