I am trying to set up a 4 headed system and I am running into problems. The basic situation is I have 3 video cards, each with 2 outputs. I can dual head any of the cards, but I cannot get any of the cards to work with ech other. I have 1 AGP Geforce FX5700 and 2 PCI ATI 9200SE. I had the two ati cards in a four head system on my Redhat 9 machine. The same XF86Config file does not work. The is the basic XF86Config File I had on Redhat: Section "Device" Identifier "ATI Graphics Adapter connector 0" Driver "radeon" BoardName "ATI Radeon 9100" ChipID 0x5157 BusID "PCI:2:09:0" Screen 0 VideoRam 131072 EndSection Section "Device" Identifier "ATI Graphics Adapter connector 1" Driver "radeon" ChipID 0x5157 BusID "PCI:2:09:0" Screen 1 EndSection Section "Device" Identifier "ATI Graphics Adapter connector 2" Driver "radeon" BoardName "ATI Radeon 9100" ChipID 0x5157 BusID "PCI:2:07:0" Screen 1 VideoRam 131072 EndSection Section "Device" Identifier "ATI Graphics Adapter connector 3" Driver "radeon" BoardName "ATI Radeon 9100" ChipID 0x5157 BusID "PCI:2:07:0" Screen 0 EndSection Section "Screen" Identifier "Screen0" Device "ATI Graphics Adapter connector 0" Monitor "Monitor0" DefaultDepth 16 I am trying to set up a 4 headed system and I am running into problems. The basic situation is I have 3 video cards, each with 2 outputs. I can dual head any of the cards, but I cannot get any of the cards to work with ech other. I have 1 AGP Geforce FX5700 and 2 PCI ATI 9200SE. I had the two ati cards in a four head system on my Redhat 9 machine. The same XF86Config file does not work. The is the basic XF86Config File I had on Redhat: Section "Device" Identifier "ATI Graphics Adapter connector 0" Driver "radeon" BoardName "ATI Radeon 9100" ChipID 0x5157 BusID "PCI:2:09:0" Screen 0 VideoRam 131072 EndSection Section "Device" Identifier "ATI Graphics Adapter connector 1" Driver "radeon" ChipID 0x5157 BusID "PCI:2:09:0" Screen 1 EndSection Section "Device" Identifier "ATI Graphics Adapter connector 2" Driver "radeon" BoardName "ATI Radeon 9100" ChipID 0x5157 BusID "PCI:2:07:0" Screen 1 VideoRam 131072 EndSection Section "Device" Identifier "ATI Graphics Adapter connector 3" Driver "radeon" BoardName "ATI Radeon 9100" ChipID 0x5157 BusID "PCI:2:07:0" Screen 0 EndSection Section "Screen" Identifier "Screen0" Device "ATI Graphics Adapter connector 0" Monitor "Monitor0" DefaultDepth 16 SubSection "Display" Depth 16 Modes "1600x1200" "1280x1024" "1024x768" EndSubSection EndSection Section "Screen" Identifier "Screen1" Device "ATI Graphics Adapter connector 1" Monitor "Monitor1" DefaultDepth 16 SubSection "Display" Depth 16 Modes "1600x1200" "1280x1024" "1024x768" EndSubSection EndSection *********** ABRIDGED FOR CONCISENESS *********** Section "ServerLayout" Identifier "Server Layout" Screen "Screen0" 0 0 Screen "Screen1" LeftOf "Screen0" Screen "Screen2" RightOf "Screen0" Screen "Screen3" LeftOf "Screen1" InputDevice "Mouse1" "CorePointer" InputDevice "Keyboard1" "CoreKeyboard" EndSection I used the BusID of 0x5157 because XFree4.3 does not know the 9200SE card. I was not getting hardware acceleration, but this was working without any problems. With my new system, dual opteron 248 running on a MSI K8T Master FAR, I am having no luck. I started by using the same XF86Config, but this just locks up my box. I have checked the /var/log/XFree86.0.log, but it appears that X is just stopping right after the Int10 module is loaded. I am getting no errors or warnings. I got the 4 head to work twice, each time I brought the system up with two heads running of the same card, then I would go to run level 3, add the other card and bring X back up with startx or init 5. This would work until I rebooted the box. After a reboot, the same sequence resulted in a locked box. I have upgraded to XFree86 4.4 which recognizes the 9200SE's but I am still only able to get one card working at a time. I used the standard radeon driver with no ChipID. I have tried the following options to my XF86Config file: NoInt10 true ConnectedMonitor CRT,CRT NoAccel true Any help would be create. Nate SubSection "Display" Depth 16 Modes "1600x1200" "1280x1024" "1024x768" EndSubSection EndSection Section "Screen" Identifier "Screen1" Device "ATI Graphics Adapter connector 1" Monitor "Monitor1" DefaultDepth 16 SubSection "Display" Depth 16 Modes "1600x1200" "1280x1024" "1024x768" EndSubSection EndSection *********** ABRIDGED FOR CONCISENESS *********** Section "ServerLayout" Identifier "Server Layout" Screen "Screen0" 0 0 Screen "Screen1" LeftOf "Screen0" Screen "Screen2" RightOf "Screen0" Screen "Screen3" LeftOf "Screen1" InputDevice "Mouse1" "CorePointer" InputDevice "Keyboard1" "CoreKeyboard" EndSection I used the BusID of 0x5157 because XFree4.3 does not know the 9200SE card. I was not getting hardware acceleration, but this was working without any problems. With my new system, dual opteron 248 running on a MSI K8T Master FAR, I am having no luck. I started by using the same XF86Config, but this just locks up my box. I have checked the /var/log/XFree86.0.log, but it appears that X is just stopping right after the Int10 module is loaded. I am getting no errors or warnings. I got the 4 head to work twice, each time I brought the system up with two heads running of the same card, then I would go to run level 3, add the other card and bring X back up with startx or init 5. This would work until I rebooted the box. After a reboot, the same sequence resulted in a locked box. I have upgraded to XFree86 4.4 which recognizes the 9200SE's but I am still only able to get one card working at a time. I used the standard radeon driver with no ChipID. I have tried the following options to my XF86Config file: NoInt10 true ConnectedMonitor CRT,CRT NoAccel true Any help would be create. Nate