ATI Fire GL V3100 and Dual display

[Alex Deucher]

On 7/21/05, Wes Bauske <wsb at paralleldata.com> wrote:
> 
> Hello,
> 
> I'm trying to get an ATI V3100 dual display card working using Xinerama. I'm
> running FC4 and configured the card using the preferences dialog.
> 
> Xorg version:  xorg-x11-6.8.2-31.x86_64.rpm
> 
> Here is the xorg.conf file:
> 
> # Xorg configuration created by system-config-display
> 
> Section "ServerLayout"
>          Identifier     "Multihead layout"
>          Screen      0  "Screen0" LeftOf "Screen1"
>          Screen      1  "Screen1" 0 0
>          InputDevice    "Mouse0" "CorePointer"
>          InputDevice    "Keyboard0" "CoreKeyboard"
>          Option      "Xinerama" "on"
>          Option      "Clone" "off"
> EndSection
> 
> Section "Files"
>          RgbPath      "/usr/X11R6/lib/X11/rgb"
>          FontPath     "unix/:7100"
> EndSection
> 
> Section "Module"
>          Load  "dbe"
>          Load  "extmod"
>          Load  "fbdevhw"
>          Load  "glx"
>          Load  "record"
>          Load  "freetype"
>          Load  "type1"
>          Load  "dri"
> EndSection
> 
> Section "InputDevice"
> 
>          Identifier  "Keyboard0"
>          Driver      "kbd"
>          Option      "XkbModel" "pc105"
>          Option      "XkbLayout" "us"
> EndSection
> 
> Section "InputDevice"
>          Identifier  "Mouse0"
>          Driver      "mouse"
>          Option      "Protocol" "IMPS/2"
>          Option      "Device" "/dev/input/mice"
>          Option      "ZAxisMapping" "4 5"
>          Option      "Emulate3Buttons" "yes"
> EndSection
> 
> Section "Monitor"
>          Identifier   "Monitor0"
>          VendorName   "Monitor Vendor"
>          ModelName    "LCD Panel 1280x1024"
>          HorizSync    31.5 - 67.0
>          VertRefresh  50.0 - 75.0
>          Option      "dpms"
> EndSection
> 
> Section "Monitor"
>          Identifier   "Monitor1"
>          VendorName   "Monitor Vendor"
>          ModelName    "LCD Panel 1280x1024"
>          HorizSync    31.5 - 67.0
>          VertRefresh  50.0 - 75.0
>          Option      "dpms"
> EndSection
> 
> Section "Device"
>          Identifier  "Videocard0"
>          Driver      "radeon"
>          VendorName  "Videocard vendor"
>          BoardName   "ATI FireGL V3100"
> EndSection
> 
> Section "Device"
>          Identifier  "Videocard1"
>          Driver      "radeon"
>          VendorName  "Videocard Vendor"
>          BoardName   "ATI FireGL V3100"
>          BusID       "PCI:1:0:0"
>          Screen      1
> EndSection
> 
> Section "Screen"
>          Identifier "Screen0"
>          Device     "Videocard0"
>          Monitor    "Monitor0"
>          DefaultDepth     24
>          SubSection "Display"
>                  Viewport   0 0
>                  Depth     16
>                  Modes    "800x600" "640x480"
>          EndSubSection
>          SubSection "Display"
>                  Viewport   0 0
>                  Depth     24
>                  Modes    "1280x1024" "1152x864" "1152x768" "1024x768" "800x600" "640x480"
>          EndSubSection
> EndSection
> 
> Section "Screen"
>          Identifier "Screen1"
>          Device     "Videocard1"
>          Monitor    "Monitor1"
>          DefaultDepth     24
>          SubSection "Display"
>                  Viewport   0 0
>                  Depth     24
>                  Modes    "1280x1024"
>          EndSubSection
> EndSection
> 
> Section "DRI"
>          Group        0
>          Mode         0666
> EndSection
> 
> This appears to initialize fine according to the Xorg.0.log. However, there is no display
> on the secondary connection. Moving the mouse cursor around shows X thinks the monitor is
> there. This same card works fine under FC3 on a different motherboard (Supermicro) so I'm
> inclined to think this is a BIOS issue. Boards that fail to initialize both heads while
> booting Linux also seem to never get X running on the 2nd display. The motherboards having
> problems are Intel D945psn and a D945gxxx with this card. I've read that X code uses an
> "int10" to soft reset video cards and wonder how this interacts with the BIOS and could
> cause this issue.
> 
> Also, under FC3 I see this same problem with an Opteron and AMD64 based motherboard using an
> Nvidia FX5200 based AGP card. Seems to happen on many combinations of dual display cards and
> motherboards. At least 6 different combinations I've tried. Other motherboards work fine.
> I have Intel D845G/D850G/D865G/D875G and all work fine. I need a D945 board to use dual
> core P4 processors so I really need to understand how to fix this.
> 
> One other thing. The connection that seems to always have trouble is the DVI. The standard
> VGA connector seems to never run into problems. I use a DVI->VGA adapter to connect the
> secondary screen. Also, this is a PCI-Express card if that matters.
> 
> Any thoughts on what to do are appreciated.

Can you post your log?  It could be that monitor detection is failing
to detect both monitors and hence one of the outputs is being
disabled.  You can force the outputs on by specifying:
Option "MonitorLayout" "CRT, CRT"
in the device section for videocard0.

Also the screen orientation in your serverlayout is wrong:

>          Screen      0  "Screen0" LeftOf "Screen1"
>          Screen      1  "Screen1" 0 0

You can't have a screen left of 0 0.

try rightof or reverse the heads:

          Screen      0  "Screen0" 0 0
          Screen      1  "Screen1" RightOf "Screen1"

Alex

> 
> Wes.bauske
> 
>