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[ILUG] Extended Desktop in Ubuntu

[ILUG] Extended Desktop in Ubuntu

Gareth Eason bigbro at skynet.ie
Fri Sep 28 17:09:34 IST 2007


motoole at tegral.com wrote:
> Hey,
> 
> I'm messing about with Ubuntu at the minute and I'm trying to get the
> extended desktop working. I've tried a few different configurations that I
> found on-line but nothing seems to work. I've got a Dell with an ATI Radeon
> X1300 graphics card. I'm using a VGA splitter to get dual monitor and
> extended desktop working in Windows however all the configurations for
> xorg.conf I've tried in Linux (Ubuntu) will not work.
[snip]

	Hi,

	I also had some fun trying to make the newer ATI cards work seamlessly with
xorg under Ubuntu. Here's by current configuration, which works extremely
well. Minor issue is that I've lied to X11 and claimed it's just one large
screen, rather than 2 x screens side by side. This means that things tend to
centre on the border between screens rather than in the centre of one or other
screen. I find this a very minor nuisance. Slightly more annoying is the
inability to view OOo Presentation slides fullscreen on one of the monitors,
for the same reason. Again, this is a minor niggle.

	Using hardware acceleration and declaring the two screens to X11
independently, requesting Xinerama to span across them, resulted in some
highly frustrating redraw bugs for the mouse pointer, resulting in me having
to use guesswork to guess where the active point of the mouse pointer was on
one of the two screens. (always the secondary.)

	Note also, I'm using the proprietary fglrx driver. Easiest way to get this is
probably installing EasyUbuntu and working from there.

	Hope this helps:

------------------------------------------------------------------------

geason at gelfling:~$ cat /etc/X11/xorg.conf

Section "Files"
        # path to defoma fonts
        FontPath     "/usr/share/X11/fonts/misc"
        FontPath     "/usr/share/X11/fonts/cyrillic"
        FontPath     "/usr/share/X11/fonts/100dpi/:unscaled"
        FontPath     "/usr/share/X11/fonts/75dpi/:unscaled"
        FontPath     "/usr/share/X11/fonts/Type1"
        FontPath     "/usr/share/X11/fonts/100dpi"
        FontPath     "/usr/share/X11/fonts/75dpi"
        FontPath     "/usr/share/fonts/X11/misc"
        FontPath     "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
EndSection

Section "Module"
        Load  "i2c"
        Load  "bitmap"
        Load  "ddc"
        Load  "dri"
        Load  "extmod"
        Load  "freetype"
        Load  "glx"
        Load  "int10"
        Load  "type1"
        Load  "vbe"
EndSection

Section "InputDevice"
Identifier "Generic Keyboard"
Driver "keyboard"
Option "CoreKeyboard"
Option "XkbRules" "xorg"
Option "XkbModel" "pc105"
Option "XkbLayout" "ie"
EndSection

Section "InputDevice"
        Identifier  "Configured Mouse"
        Driver      "mouse"
        Option      "CorePointer"
        Option      "Device" "/dev/input/mice"
        Option      "Protocol" "ExplorerPS/2"
        Option      "ZAxisMapping" "4 5"
        Option      "Emulate3Buttons" "true"
EndSection

Section "Monitor"
        Identifier   "aticonfig-Monitor[0]"
        Option      "VendorName" "ATI Proprietary Driver"
        Option      "ModelName" "Generic Autodetecting Monitor"
        Option      "DPMS" "true"
EndSection

Section "Monitor"
        Identifier   "aticonfig-Monitor[1]"
        Option      "VendorName" "ATI Proprietary Driver"
        Option      "ModelName" "Generic Autodetecting Monitor"
        Option      "DPMS" "true"
EndSection

Section "Device"
        Identifier  "aticonfig-Device[0]"
        Driver      "fglrx"
        Option      "VideoOverlay" "on"
        Option      "OpenGLOverlay" "off"
        Option      "DesktopSetup" "horizontal"
        BusID       "PCI:1:0:0"
EndSection

Section "Device"
        Identifier  "aticonfig-Device[1]"
        Driver      "fglrx"
        BusID       "PCI:1:0:1"
        Screen      1
EndSection

Section "Screen"
        Identifier "aticonfig-Screen[0]"
        Device     "aticonfig-Device[0]"
        Monitor    "aticonfig-Monitor[0]"
        DefaultDepth     24
        SubSection "Display"
                Viewport   0 0
                Depth     24
        EndSubSection
EndSection

Section "Screen"
        Identifier "aticonfig-Screen[1]"
        Device     "aticonfig-Device[1]"
        Monitor    "aticonfig-Monitor[1]"
        DefaultDepth     24
        SubSection "Display"
                Viewport   0 0
                Depth     24
        EndSubSection
EndSection

Section "ServerLayout"
        Identifier     "Default Layout"
        Screen      0  "aticonfig-Screen[0]" 0 0
        Option "Xinerama" "On"
        InputDevice    "Generic Keyboard"
        InputDevice    "Configured Mouse"
EndSection

Section "DRI"
        Mode         0666
EndSection

Section "Extensions"
        Option      "Composite" "Disable"
EndSection



-----------------------------------------------------------------------------

Also, for your information, my xdpyinfo:

geason at gelfling:~$ xdpyinfo
name of display:    :0.0
version number:    11.0
vendor string:    The X.Org Foundation
vendor release number:    70200000
X.Org version: 7.2.0
maximum request size:  16777212 bytes
motion buffer size:  256
bitmap unit, bit order, padding:    32, LSBFirst, 32
image byte order:    LSBFirst
number of supported pixmap formats:    7
supported pixmap formats:
    depth 1, bits_per_pixel 1, scanline_pad 32
    depth 4, bits_per_pixel 8, scanline_pad 32
    depth 8, bits_per_pixel 8, scanline_pad 32
    depth 15, bits_per_pixel 16, scanline_pad 32
    depth 16, bits_per_pixel 16, scanline_pad 32
    depth 24, bits_per_pixel 32, scanline_pad 32
    depth 32, bits_per_pixel 32, scanline_pad 32
keycode range:    minimum 8, maximum 255
focus:  window 0x24065cb, revert to Parent
number of extensions:    29
    ATIFGLEXTENSION
    ATITVOUT
    BIG-REQUESTS
    DAMAGE
    DPMS
    Extended-Visual-Information
    GLX
    MIT-SCREEN-SAVER
    MIT-SHM
    MIT-SUNDRY-NONSTANDARD
    RENDER
    SECURITY
    SGI-GLX
    SHAPE
    SYNC
    TOG-CUP
    X-Resource
    XAccessControlExtension
    XC-APPGROUP
    XC-MISC
    XFIXES
    XFree86-Bigfont
    XFree86-DGA
    XFree86-Misc
    XFree86-VidModeExtension
    XInputExtension
    XKEYBOARD
    XTEST
    XVideo
default screen number:    0
number of screens:    1

screen #0:
  dimensions:    2560x1024 pixels (765x302 millimeters)
  resolution:    85x86 dots per inch
  depths (7):    24, 1, 4, 8, 15, 16, 32
  root window id:    0x3e
  depth of root window:    24 planes
  number of colormaps:    minimum 1, maximum 1
  default colormap:    0x20
  default number of colormap cells:    256
  preallocated pixels:    black 0, white 16777215
  options:    backing-store NO, save-unders NO
  largest cursor:    64x64
  current input event mask:    0xfa4033
    KeyPressMask             KeyReleaseMask           EnterWindowMask
    LeaveWindowMask          KeymapStateMask          StructureNotifyMask
    SubstructureNotifyMask   SubstructureRedirectMask FocusChangeMask
    PropertyChangeMask       ColormapChangeMask
  number of visuals:    8
  default visual id:  0x23
  visual:
    visual id:    0x23
    class:    TrueColor
    depth:    24 planes
    available colormap entries:    256 per subfield
    red, green, blue masks:    0xff0000, 0xff00, 0xff
    significant bits in color specification:    8 bits
  visual:
    visual id:    0x24
    class:    TrueColor
    depth:    24 planes
    available colormap entries:    256 per subfield
    red, green, blue masks:    0xff0000, 0xff00, 0xff
    significant bits in color specification:    8 bits
  visual:
    visual id:    0x25
    class:    TrueColor
    depth:    24 planes
    available colormap entries:    256 per subfield
    red, green, blue masks:    0xff0000, 0xff00, 0xff
    significant bits in color specification:    8 bits
  visual:
    visual id:    0x26
    class:    TrueColor
    depth:    24 planes
    available colormap entries:    256 per subfield
    red, green, blue masks:    0xff0000, 0xff00, 0xff
    significant bits in color specification:    8 bits
  visual:
    visual id:    0x27
    class:    DirectColor
    depth:    24 planes
    available colormap entries:    256 per subfield
    red, green, blue masks:    0xff0000, 0xff00, 0xff
    significant bits in color specification:    8 bits
  visual:
    visual id:    0x28
    class:    DirectColor
    depth:    24 planes
    available colormap entries:    256 per subfield
    red, green, blue masks:    0xff0000, 0xff00, 0xff
    significant bits in color specification:    8 bits
  visual:
    visual id:    0x29
    class:    DirectColor
    depth:    24 planes
    available colormap entries:    256 per subfield
    red, green, blue masks:    0xff0000, 0xff00, 0xff
    significant bits in color specification:    8 bits
  visual:
    visual id:    0x2a
    class:    DirectColor
    depth:    24 planes
    available colormap entries:    256 per subfield
    red, green, blue masks:    0xff0000, 0xff00, 0xff
    significant bits in color specification:    8 bits
geason at gelfling:~$

	Best regards,
	-->Gar




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