BusID and dual monitors

[Foob]

Hi,

I'm having some trouble setting up a dual monitor system, and would appreciate some help. I'm using a VIA Epia system with onboard via graphics chipset, alongside an old cirrus logic board. I have successfully got both graphics cards working individually, but am having no success with both together. Whichever card I specify as Screen 0 will work, but Screen 1 won't. Among the successful X startup windows I get either:

(WW) via: No matching Device section for instance(BusID PCI:1:0:0)  found
(EE) Screen 1 deleted because of no matching config section

or

(WW) CIRRUS: No matching Device section for  instance(BusID PCI:0:20:0) found
(EE) Screen 0 deleted because of no matching config section.
(EE) VIA(0): [dri] DRIScreenInit failed. Disabling DRI.

In both cases I also get:

error opening security policy file /etc/X11/xserver/SecurityPolicy

I guess I have the wrong busid numbers, but since I got them by using the autodetection script (dpkg-reconfigure xserver-xorg), and they work individually, I don't know what to set them to!

I've attached my xorg.conf, and would appreciate any suggestions.

Thanks.

xorg.conf follows

Section "Files"
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"
# path to defoma fonts
FontPath "/var/lib/defoma/x-ttcidfont-conf.d/dirs/TrueType"
EndSection

Section "Module"
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 "kbd"
Option "CoreKeyboard"
Option "XkbRules" "xorg"
Option "XkbModel" "pc105"
Option "XkbLayout" "gb"
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 "Device"
Identifier "Cirrus Logic GD 5446"
Driver "cirrus"
BusID "PCI:0:20:0"
Option "UseFBDev" "true"
Screen 0
EndSection

Section "Device"
  identifier "VIA Technologies, Inc. VT8623 [Apollo CLE266] integrated CastleRock graphics"
  boardname "S3 UniChrome"
  busid "PCI:1:0:0"
  driver "via"
  Screen 1
  Option "UseFBDev" "true"
  vendorname "S3"
EndSection

Section "Monitor"
        Identifier      "Generic Monitor"
        Option          "DPMS"
        HorizSync       28-38
        VertRefresh     43-72
EndSection


Section "Monitor"
Identifier "Generic Monitor2"
Option "DPMS"
HorizSync 28-38
VertRefresh 43-72
EndSection

Section "Screen"
Identifier "Default Screen"
Device "Cirrus Logic GD 5446"
Monitor "Generic Monitor"
DefaultDepth 24
SubSection "Display"
Depth 1
Modes "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 4
Modes "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 8
Modes "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 15
Modes "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 16
Modes "800x600" "640x480"
EndSubSection
SubSection "Display"
Depth 24
Modes "800x600" "640x480"
EndSubSection
EndSection

Section "Screen"
  Identifier "Second Screen"
  Device "VIA Technologies, Inc. VT8623 [Apollo CLE266] integrated CastleRock graphics"
  Monitor "Generic Monitor2"
  DefaultDepth 24
  SubSection "Display"
    depth 24
    modes "800x600@60" "800x600@56" "640x480@60"
  EndSubSection
EndSection

Section "ServerFlags"
Option "Xinerama" "ON"
EndSection

Section "ServerLayout"
Identifier "Default Layout"
Screen 0 "Default Screen" 0 0
Screen 1 "Second Screen" RightOf "Default Screen"
InputDevice "Generic Keyboard"
InputDevice "Configured Mouse"
EndSection

Section "DRI"
Mode 0666
EndSection

[Teppic]

Re: BusID and dual monitors

The screen0 and screen1 options are normally used when trying to identify a specific head on a dual head card, try taking them out from the device sections.
My triple monitor setup worked without a screen option in the single headed cards device section.

[Foob]

Re: BusID and dual monitors

Thanks, that was the problem. Unfortunately, there seems to be an interaction between the two different drivers, since one of the screens is garbled (the via logo appears in garbled form on the cirrus screen!) Back to the drawing board.