ATI Radeon 3650 Dual Head "Independent Desktops"

DrAxeman · 07-08-2009, 01:50 AM

I'm having an issie with the configuration of the ATI Radeon 3650 graphics card in my Lenovo T500. I'm using Fedora 10, and I've been using he fglrx module with little issue under normal use.

My issue comes when I try to use a 2nd monitor or projector. My desktop stretches to the 2nd device. I can't manage the screen resolution of each monitor independently.

When I attempt to use Gnome to manage change my display settings, it doesn't recognize the "second video card".

Where should I be looking?

Thanks,

business_kid · 07-08-2009, 03:41 AM

Quote:

Originally Posted by DrAxeman

I'm having an issie with the configuration of the ATI Radeon 3650 graphics card in my Lenovo T500. I'm using Fedora 10, and I've been using he fglrx module with little issue under normal use.

My issue comes when I try to use a 2nd monitor or projector. My desktop stretches to the 2nd device. I can't manage the screen resolution of each monitor independently.

When I attempt to use Gnome to manage change my display settings, it doesn't recognize the "second video card".

Where should I be looking?

Thanks,

In xorg.conf.

I think the trick is to have one video card (which you probably have) and 2 device sections for the various monitors (which you also have) There are working xorg.conf files out there for 'double head' applications. Don't pressure me on the fine details. But I would add another device section for your second monitor and boot up with that and see how it falls over.

DrAxeman · 07-08-2009, 02:36 PM

I've found a lot of examples, but none work they way I need them to. I can't manage each screen independently.

I can get the external monitor to work, but not with an independent resolution from the laptop monitor. This means my monitor looks funky.

I did get my fn-F7 to work by inserting

Option "BIOSHotkeys" "on"

Into the "Device" section of xorg.conf. This let's me toggle the external monitor mode.

I still however, can't manage the monitors independently. Here is my xorg.conf:

Code:

# Xorg configuration created by livna-config-display

Section "ServerLayout"
        Identifier     "dual head configuration"
        Screen      0  "Screen0" 0 0
        Screen      1  "Screen1" RightOf "Screen0"
        Option      "DualHead" "true"
EndSection

Section "Files"
        ModulePath   "/usr/lib64/xorg/modules/extensions/fglrx"
        ModulePath   "/usr/lib64/xorg/modules"
EndSection

Section "ServerFlags"
        Option      "AIGLX" "on"
EndSection

Section "Monitor"
        Identifier   "Lenovo Monitor"
        VendorName   "Monitor Vendor"
        ModelName    "LCD Panel 1280x1024"
        HorizSync    31.5 - 64.0
        VertRefresh  56.0 - 65.0
        Option      "dpms"
EndSection

Section "Monitor"
        Identifier   "External Monitor"
        VendorName   "Monitor Vendor"
        ModelName    "LCD Panel 1280x1024"
        HorizSync    31.5 - 64.0
        VertRefresh  56.0 - 65.0
        Option      "dpms"
EndSection

Section "Device"
        Identifier  "Videocard0"
        Driver      "fglrx"
        Option      "OpenGLOverlay" "off"
        Option      "VideoOverlay" "on"
        Option      "BIOSHotkeys" "on"
EndSection

Section "Device"
        Identifier  "Videocard1"
        Driver      "fglrx"
        Option      "OpenGLOverlay" "off"
        Option      "VideoOverlay" "on"
        Screen      1
EndSection

Section "Screen"
        Identifier "Screen0"
        Device     "Videocard0"
        DefaultDepth     24
        SubSection "Display"
                Viewport   0 0
                Depth     24
        EndSubSection
EndSection

Section "Screen"
        Identifier "Screen1"
        Device     "Videocard1"
        DefaultDepth     24
        SubSection "Display"
                Depth     24
        EndSubSection
EndSection

Section "Extensions"
        Option      "Composite" "Enable"
EndSection

DrAxeman · 07-08-2009, 03:19 PM

I made some changes and the resolution looks better, but these screens are not truely independent. My panels stretch across both screens, and the bottom one I can't see on the external monitor.

My wallpaper is also centered between the 2 screens. I'd like to see my wallpaper centered on each monitor.

Best way to describe this, is I'd like it to look like I have 2 copies of xorg running.

Still working on this.....

business_kid · 07-09-2009, 02:42 AM

A good start.
May I suggest taking out the second video card settings. Then add Modes lines after the depth lines in the screen sections. Make the modea different.

I also wonder about the "Option DualHead" setting. That's probably tellig X what to put on those monitors.