xorg 6.8 broken dual-head in radeon RV350

[Alan Coopersmith]

xorg_xinerama at opengroup.org is a dead list.    To communicate with the Xorg
developers, use <xorg at lists.freedesktop.org> (cc'ed here) or file a bug at
https://bugs.freedesktop.org/enter_bug.cgi?product=xorg .

	-Alan Coopersmith-           alan.coopersmith at sun.com
	 Sun Microsystems, Inc. - X Window System Engineering


Phil Dibowitz wrote:
> Hey folks,
> 
> So it turns out that the 6.8 branch seems to have broken the ability to
> use the dual-headed capability of the ATI Technologies Inc RV350
> [Mobility Radeon 9600 M10] card.
> 
> In particular while having trouble making this work, I found this:
> 
> http://lists.freebsd.org/pipermail/freebsd-mobile/2005-January/005613.html
> 
> And I seem to have the same experience they do in 6.8.
> 
> The logs show that Xorg seems unable to find the second monitor:
> 
>  (WW) RADEON(0): Failed to detect secondary monitor, MergedFB/Clone mode
>  disabled
> 
> The relevant parts of my config are:
> 
> Section "Device"
>         Identifier      "Card0"
>         Driver          "ati"
>         VendorName      "ATI Technologies, Inc."
>         BoardName       "RV350 [Mobility Radeon 9600 M10]"
>         Screen          0
>         BusID           "PCI:1:0:0"
> EndSection
> 
> Section "Device"
>         Identifier      "Card1"
>         Driver          "ati"
>         VendorName      "ATI Technologies, Inc."
>         BoardName       "RV350 [Mobility Radeon 9600 M10]"
>         Screen          1
>         BusID           "PCI:1:0:0"
> EndSection
> 
> Section "Monitor"
>         Identifier      "Generic Monitor"
>         Option          "DPMS"
>         HorizSync       30-65
>         VertRefresh     50-75
> EndSection
> 
> Section "Monitor"
>         Identifier      "Dell Trinitron P991"
>         Option          "DPMS"
>         HorizSync       30-107
>         VertRefresh     48-85
> EndSection
> 
> Section "Screen"
>         Identifier      "Screen 0"
>         Device          "Card0"
>         Monitor         "Generic Monitor"
>         DefaultDepth    24
>         SubSection "Display"
>                 Depth           24
>                 Modes           "1280x1024" "1280x960" "1152x864" "1024x768" "800x600" "640x480"
>         EndSubSection
> EndSection
> 
> Section "Screen"
>         Identifier      "Screen 1"
>         Device          "Card1"
>         Monitor         "Dell Trinitron P991"
>         DefaultDepth    24
>         SubSection "Display"
>                 Depth           24
>                 Modes           "1280x1024" "1280x960" "1152x864" "1024x768" "800x600" "640x480"
>         EndSubSection
> EndSection
> 
> Section "ServerLayout"
>         Identifier      "Default Layout"
>         Screen          "Screen 0"
>         Screen          "Screen 1" LeftOf "Screen 0"
>         InputDevice     "Generic Keyboard"
>         InputDevice     "Configured Mouse"
>         InputDevice     "Synaptics Touchpad"
>         Option          "Xinerama" "on"
> EndSection
> 
> 
> I'm using Xorg 6.8.2 in Debian unstable - not sure what the other people
> I pointed to are running.
> 
> 
> I suspect it's perfectly likely no one ever reported this to the
> developers, so I thought I'd send an email and see if it was a bug, or a
> new config that needs to be there, or what.
> 
> Thanks,
>