I am running into problems getting dual head working with Slackware 12.2 using a Radeon HD 2400 XT card in a Dell Optiplex 755. I have two identical monitors (Dell 2009w) and the video card has the dongle with 2 VGA connectors. I have added the second monitor and screen to my xorg.conf but still no luck. I am using the open source radeon driver (fglrx driver does not seem to like my system). Has anyone had any luck getting dual head set up with a similar configuration?

Any help would be appreciated.

Here is my current xorg.conf:

Section "Module"
Load "dbe" # Double buffer extension
SubSection "extmod"
Option "omit xfree86-dga" # don't initialise the DGA extension
EndSubSection
Load "type1"
Load "freetype"
#Load "speedo"
Load "glx"
EndSection

Section "Files"
RgbPath "/usr/share/X11/rgb"
FontPath "/usr/share/fonts/local/"
FontPath "/usr/share/fonts/misc/"
FontPath "/usr/share/fonts/OTF/"
FontPath "/usr/share/fonts/TTF/"
FontPath "/usr/share/fonts/Type1/"
FontPath "/usr/share/fonts/CID/"
FontPath "/usr/share/fonts/Speedo/"
FontPath "/usr/share/fonts/75dpi/:unscaled"
FontPath "/usr/share/fonts/100dpi/:unscaled"
FontPath "/usr/share/fonts/75dpi/"
FontPath "/usr/share/fonts/100dpi/"
FontPath "/usr/share/fonts/cyrillic/"
EndSection

Section "ServerFlags"
EndSection

Section "InputDevice"
Identifier "Keyboard1"
Driver "kbd"
EndSection

Section "InputDevice"
Identifier "Mouse1"
Driver "mouse"
Option "Protocol" "IMPS/2"
Option "Device" "/dev/mouse"
Option "ZAxisMapping" "4 5"
EndSection

Section "Monitor"
Identifier "mon0"
# HorizSync 30-83
# VertRefresh 56-76
EndSection

Section "Monitor"
Identifier "mon1"
# HorizSync 30-83
# VertRefresh 56-76
# Option "RightOf" "mon0"
EndSection

Section "Device"
Identifier "Radeon"
Driver "radeon"
Option "monitor-DVI-0" "mon0"
Option "monitor-DVI-1" "mon1"
BusID "PCI:1:0:0"
EndSection

Section "Screen"
Identifier "Screen 0"
Device "Radeon"
Monitor "mon0"
DefaultDepth 24
Subsection "Display"
Depth 24
# Modes "1680x1050"
EndSubsection
EndSection

Section "Screen"
Identifier "Screen 1"
Device "Radeon"
Monitor "mon1"
DefaultDepth 24
Subsection "Display"
Depth 24
# Modes "1680x1050"
EndSubsection
EndSection

Section "ServerLayout"
Identifier "dual head configuration"
Screen "Screen 0"
Screen "Screen 1" RightOf "Screen 0"
InputDevice "Mouse1" "CorePointer"
InputDevice "Keyboard1" "CoreKeyboard"
EndSection

the radeon driver uses xrandr for dual head(and the like) configurations. This website may be of help http://intellinuxgraphics.org/dualhead.html

Also man xrandr. I used it for a bit and switched back to the fglrx driver. I should have kept my conf file which was setup for multi-monitors.

I seem to remember there being a configuration program that ati had to help set this up for you. aticonfig probably? have you tried that?

Your set up seems quite similar to mine:

I have not found it necessary to add both monitors to xorg.conf. The only modification I have made was the addition of the "Virtual" line in the Screen section.

Here's my xorg.conf:

I then run 'xrandr' to get the names of the monitors (In my case DVI-0 and DVI-1) then run:


Hope this helps!

Thanks for all the suggestions. I was able to get the dual head set up working with the ATI proprietary drivers. The latest version (9.1) compiled OK and the module loaded, but would crash when I started X. Went back to the previous version (8.12) and everything worked as advertised. I really appreciate all the suggestions, you guys are great!

--
PDD

9.1 wont build in 12.2 because of a missing msi_pci entry in the kernel config can't remember the name off hand. You can recompile the kernel, enable that option and the new driver will build. I run X1600 and really don't notice a difference from 8.12 to 9.1, but some other models may notice a difference. Also remember if you decide to tackle the opensource driver again you need to re-install the mesa package. Ati's driver overwrites some files and doesn't replace them(which it says they do).