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Old 04-28-2005, 10:36 PM   #1
LQ Newbie
Registered: Jul 2003
Posts: 22

Rep: Reputation: 15
The igp 320M the dual monitor configuration and the error...

Hello everybody

I have a major problem with the configuration of Xorg about the radeon driver and the dual monitor desktop concept.

I use a Fujitsu-Siemens laptop which has an ATI IGP 320M graphics adapter.

The driver consists not to operate the displays simultaneously (the LCD panel and the external CRT monitor)

The error is always:
(WW) RADEON(0): Failed to detect secondary monitor, MergedFB/Clone mode disabled
My xorg.conf is the following

Section "Monitor"
        Identifier   "Monitor0"
        Option  "DPMS"
        HorizSync       30-60

Section "Monitor"
        Identifier   "Monitor1"
        Option       "DPMS"
        HorizSync       30-60

Section "Device"
	Identifier  "Card0"
        Driver      "radeon"
	BusID       "PCI:1:5:0"
	Option "MonitorLayout" "LVDS,CRT"
        Screen  0

Section "Device"
	Identifier  "Card1"
        Driver      "radeon"
	BusID       "PCI:1:5:0"
	Option "MonitorLayout" "CRT,LVDS"
        Screen  1

Section "Screen"
        Identifier "Screen0"
        Device     "Card0"
        Monitor    "Monitor0"
        DefaultDepth 24
SubSection "Display"
                Depth     24
                Modes     "1024x768"

Section "Screen"
        Identifier "Screen1"
        Device     "Card1"
        Monitor    "Monitor1"
        DefaultDepth 24
SubSection "Display"
                Depth     24
                Modes     "1024x768"

Section "ServerFlags"
       Option  "Xinerama"

Section "ServerLayout"
        Identifier     " Configured"
        Screen      0  "Screen0"
        Screen      1  "Screen1" RightOf "Screen0"
        InputDevice    "Mouse0" "CorePointer"
        InputDevice    "Keyboard0" "CoreKeyboard"
        Option "Xinerama" "on"
Also the driver recognizes the devices as following

(II) RADEON(0): Primary:
 Monitor   -- LVDS
 Connector -- DVI-I
 DAC Type  -- TVDAC/ExtDAC
 TMDS Type -- NONE
 DDC Type  -- NONE
(II) RADEON(0): Secondary:
 Monitor   -- CRT
 Connector -- VGA
 DAC Type  -- Primary
 TMDS Type -- NONE
 DDC Type  -- VGA_DDC
Is the above correct? I believe the DAC types should be different.

If I change the order of LVDS and CRT in xorg.conf then the CRT monitor works but not the LCD one.

I tried to change the Screen sections using the same device but the error is the same.

Is something incorrect about the .conf? Or something else is going on?

Thanks in advance
Old 05-01-2005, 03:31 PM   #2
Robert G. Hays
Registered: Jan 2003
Location: Atlanta, Ga., USA
Distribution: Gentoo, Mandrake, ~others
Posts: 157

Rep: Reputation: 30
Have you gone to the ATI site, found out which driver is for your card, and run the 'fglrx'config' or whatever for your driver?

Also, it is within the possible that the lappy-chip does not know dual- or extended-screen output. is your best resource here; along with the ATI and F-S sites. Search terms should include things like:
dual-monitor (also without the dash and "inside quotes")
dual-head (ditto)
wide-screen ()
Old 05-26-2005, 04:00 PM   #3
LQ Newbie
Registered: May 2005
Distribution: Gentoo
Posts: 1

Rep: Reputation: 0
I just had the same problem with my Fujitsu and used the solution provided here:
I hope that helps,


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