Re: dual head on ATI Radeon Mobility M6 LY
On Tue, 24 Sep 2002 22:37:28 +0200
Sebastian Kanthak <sebastian.kanthak@muehlheim.de> wrote:
> Hi,
>
> I've bought an IBM Thinkpad R32 with an ATI Radeon Mobility M6 LY (rev 0)
> card, which supports dual head (at least under the pre-installed Win XP) just
> fine.
>
> I've successfully installed Debian/Woody with the experimental XFree86 4.2.1
> packages. Now, I want to configure dual head operation with an external
> monitor under Linux. I've already read the Xinerama HOWTO and found a message
> on this list, that it should work with my card. If I understand things
> correctly, one has to put two devices with a different BusID into
> /etc/X11/XFree86-4. However, I only find one graphic-adapter on my pci-bus.
> Here is output of lspci:
>
> 00:00.0 Host bridge: Intel Corp. 82845 845 (Brookdale) Chipset Host Bridge
> (rev 04)
> 00:01.0 PCI bridge: Intel Corp. 82845 845 (Brookdale) Chipset AGP Bridge (rev
> 04)
> 00:1d.0 USB Controller: Intel Corp.: Unknown device 2482 (rev 02)
> 00:1d.1 USB Controller: Intel Corp.: Unknown device 2484 (rev 02)
> 00:1d.2 USB Controller: Intel Corp.: Unknown device 2487 (rev 02)
> 00:1e.0 PCI bridge: Intel Corp. 82820 820 (Camino 2) Chipset PCI (-M) (rev 42)
> 00:1f.0 ISA bridge: Intel Corp.: Unknown device 248c (rev 02)
> 00:1f.1 IDE interface: Intel Corp.: Unknown device 248a (rev 02)
> 00:1f.3 SMBus: Intel Corp.: Unknown device 2483 (rev 02)
> 00:1f.5 Multimedia audio controller: Intel Corp. AC'97 Audio Controller (rev
> 02)
> 00:1f.6 Modem: Intel Corp.: Unknown device 2486 (rev 02)
> 01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility M6 LY
> 02:07.0 Network controller: Harris Semiconductor: Unknown device 3873 (rev 01)
> 02:08.0 Ethernet controller: Intel Corp. 82801CAM (ICH3) Chipset Ethernet
> Controller (rev 42)
> 02:09.0 CardBus bridge: Texas Instruments PCI1410 PC card Cardbus Controller
> (rev 02)
>
> The only VGA adapter seems to be 01:00.0. Is it correct, that for Xinerama,
> there would have to be a second VGA device in this listing? Or is there
> another way to set it up correctly? Are there perhaps any kernel/bios
> parameters that would result in another vga device popping up in the lspci
> listing?
Mostly you just need to explain things to X
Try adding these sections to your /etc/XF86Config-4:
Section "ServerFlags"
Option "Xinerama"
EndSection
Section "ServerLayout"
Identifier "Layout 1"
Screen 0 "SCREEN 1"
Screen 1 "SCREEN 2" LeftOf "SCREEN 1"
InputDevice "Configured Mouse" "CorePointer"
InputDevice "Generic Keyboard" "CoreKeyboard"
EndSection
(Your info here will be different than mine)
Section "Device"
Identifier "MGA 1"
VendorName "Matrox"
BoardName "MGA G550 AGP"
Driver "mga"
Option "AGPMode" "1"
BusID "PCI:01:00:0"
Screen 0
EndSection
Section "Device"
Identifier "MGA 2"
VendorName "Matrox"
BoardName "MGA G550 AGP"
Driver "mga"
Option "AGPMode" "1"
BusID "PCI:01:00:0"
Screen 1
EndSection
Section "Monitor"
Identiifier "Display 1"
VendorName "Compaq"
ModelName "S900"
HorizSync 30-100
VertRefresh 50-160
Option "DPMS"
EndSection
Section "Monitor"
Identifier "Display 2"
VendorName "Compaq"
ModelName "1725"
HorizSync 31.5-64.3
VertRefresh 50-100
Option "DPMS"
EndSection
Section "Screen"
Identifier "SCREEN 1"
Device "MGA 1"
Monitor "Display 1"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1600x1200" "1280x1024" "1024x768"
EndSubSection
EndSection
(Add SubSections as above for other Depth and Modes as you require)
Section "Screen"
Identifier "SCREEN 2"
Device "MGA 2"
Monitor "Display 2"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1024x768"
EndSubSection
EndSection
You should be able to figure it out from here. Notice that both "Device" Sections have the same BusID, and remember to tell the server where the screens are in relation to each other. Everything is case sensitive.
Bon Chance!
Craig
>
> ciao Sebastian
>
> --
> Sebastian Kanthak | sebastian.kanthak@muehlheim.de
>
>
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