[root@fedora ~]$ Xorg -configure

[root@fedora ~]$ cp /root/xorg.conf.new /etc/X11/xorg.conf

[root@fedora ~]$ cp /etc/X11/xorg.conf /etc/X11/xorg.conf.backup

# --screen-layout will place second screen on left of your first screen. Other possible values are right,above,below.
# --xinerama=on option enables you to have two different desktops and one of them being passive.
# You can drag and drop windows from one desktop to the other. Task bars appear only on one of the desktops.
[root@fedora ~]$ aticonfig --initial=dual-head --screen-layout=left --xinerama=on
# --resolution=_screen_number_,widthxheight
[root@fedora ~]$ aticonfig --resolution=0,1440x900 --resolution=1,1280x1024
# Set horizontal sync and vertical refresh rates for both monitors.
[root@fedora ~]$ aticonfig --hsync=0,30-60 --hsync=1,30-60 --vrefresh=0,30-60 --vrefresh=1,30-60

12 thoughts on “How To: Configure Dual Display with ATI Radeon (fglrx)”

1. i hope u don’t use that SBI debit card any more, which is on display with the last pic.

   1. I do 🙂

2. If xorg miscomputes the dpi in your system, please do not add yet another ugly workaround on the internet, but complain to ATI so they fix their driver.

   OTOH if it computes the correct value, but you don’t like the default font sizes, ping the GNOME maintainers so they make it easier to change the default font sizes (without changing the meaning of font units behind the application back to workaround the lack of a convenient font preferences UI)

   DPI is not a font size unit. It’s a technical parameters users should not have to touch ever

   1. Cool. I complain to ATI. I complain to GNOME. But what do I do till they fix it? Sit like a dumb ass with friggin huge fonts?

      If you don’t like to fix your font, don’t follow this howto.

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4. If you choose to use the free software driver (radeon or radeonhd), the steps consist of:

   1) run gnome-display-properties
   2) drag and drop the screens to be organized in the way you want

   I really cannot understand why NVIDIA and ATI can’t just implement RandR 1.2 already. Sigh.

   1. Adam,

      I think ATI is trying hard. They are rolling out new versions quickly now.

5. Hi Dear Kulbir,

   I was planning to try this multiple desktop thing for a few weeks. I was affraid to fail and spend too much time on it. But I found this article and It just took 10 minutes for me to work with two monitors. I will share the link of this article on my own blog if you dont mind.

6. To be specific, I have a laptop with 1366×768 res. and a Philips 170s LCD with 1280×1024 res.

7. Hi Kulbir,

   I have ATI card and I am trying 2×23″ samsung monitor. I am using fedora 12. However, my monitors are exactly of same config. I do not get the same resolution – using dual VGA port. While I am using the second VGA port it is always giving me bad resolution. Even when I am using only one monitor with the 2nd VGA port.
   I predict it is something to do with the ATI card itself. Could you help me on that?

   Thanks in advance!

8. here is my ‘xrandr’ output

   My primary screen is great – second monitor is working fine too – The only problem is – is MUCH stretched. I am using dual VGA adaptor – port one is working great but when connecting another monitor with the second port – I am getting the problem.

   DVI-0 connected 2048×1152+0+0 (normal left inverted right x axis y axis) 510mm x 287mm
   2048×1152 59.9*+
   1680×1050 60.0
   1280×1024 60.0
   1440×900 59.9
   1280×960 60.0
   1280×800 59.8
   1024×768 60.0
   800×600 60.3 56.2
   640×480 60.0
   DVI-1 connected 2048×1152+2048+0 (normal left inverted right x axis y axis) 510mm x 287mm
   2048×1152 59.9*+
   1680×1050 60.0
   1280×1024 60.0
   1440×900 59.9
   1280×960 60.0
   1280×800 59.8
   1024×768 60.0
   800×600 60.3 56.2
   640×480 60.0

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