[Bug 13590] New: Dual-head fails with ati driver, appears related to 'crtc'

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=13590

           Summary: Dual-head fails with ati driver, appears related to
                    'crtc'
           Product: xorg
           Version: unspecified
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: anthony.brock at oregonstate.edu
         QAContact: xorg-team at lists.x.org


I'm experiencing problems with dual-head setup and xrandr 1.2 following a
recent upgrade to Ubuntu 7.10 (Gutsy) from Ubuntu 7.04 (Feisty) on my Dell
Latitude D810 laptop with docking station. This worked on Feisty with the ati
driver and it still functions when I change over to the "fglrx" driver (which
rules out bad hardware).

I have a striped down configuration xorg.conf (see below) with two identical
Dell FP1905 monitors connected through a docking station, one via VGA-0 and the
other via DVI-0. On startup the DVI-0 monitor functions as expected and the
LVDS monitor initializes but displays nonsense (some wierd color patterns). I
then issue the following command to disable the LVDS:

xrandr --output LVDS --off

At this point, I can then activate the VGA-0 monitor with this command:

xrandr --output VGA-0 --auto

However, VGA-0 then displays "1: Analog Input Cannot Display This Video Mode".
But, the working screen will "shift" from DVI-0 to VGA-0 when I issue the
following command:

xrandr --output DVI-0 --crtc 0 --output VGA-0 --crtc 1

At this point, my desktop is properly displayed on VGA-0 while DVI-0 displays
"2: Digital Input Cannot Display This Video Mode". Is it possible that this bug
is related to "crtc 0" on the ATI x600 (M24)?

I have tried turning the "LVDSBiosNativeMode" option to "false", turning the
"DRI" option to "off" and playing around with the "Virtual" option. I've even
tried completely removing the xorg.conf file, but nothing has had a positive
impact. I opened a bug report with Ubuntu (
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/172601 )
and am opening this at their request.

I can supply a log file upon request and my current xorg.conf is included
below. The Ubuntu package description for this driver lists the version as
"1:6.7.195-1ubuntu2".

Tony


/etc/X11/xorg.conf:

Section "Files"
EndSection
Section "InputDevice"
        Identifier      "Generic Keyboard"
        Driver          "kbd"
        Option          "CoreKeyboard"
        Option          "XkbRules"      "xorg"
        Option          "XkbModel"      "pc104"
        Option          "XkbLayout"     "us"
EndSection
Section "InputDevice"
        Identifier      "Configured Mouse"
        Driver          "mouse"
        Option          "CorePointer"
        Option          "Device"                "/dev/input/mice"
        Option          "Protocol"              "ImPS/2"
        Option          "ZAxisMapping"          "4 5"
        Option          "Emulate3Buttons"       "true"
EndSection
Section "InputDevice"
        Identifier      "Synaptics Touchpad"
        Driver          "synaptics"
        Option          "SendCoreEvents"        "true"
        Option          "Device"                "/dev/psaux"
        Option          "Protocol"              "auto-dev"
        Option          "HorizEdgeScroll"       "0"
EndSection
Section "InputDevice"
        Driver          "wacom"
        Identifier      "stylus"
        Option          "Device"        "/dev/input/wacom"
        Option          "Type"          "stylus"
        Option          "ForceDevice"   "ISDV4"         # Tablet PC ONLY
EndSection
Section "InputDevice"
        Driver          "wacom"
        Identifier      "eraser"
        Option          "Device"        "/dev/input/wacom"
        Option          "Type"          "eraser"
        Option          "ForceDevice"   "ISDV4"         # Tablet PC ONLY
EndSection
Section "InputDevice"
        Driver          "wacom"
        Identifier      "cursor"
        Option          "Device"        "/dev/input/wacom"
        Option          "Type"          "cursor"
        Option          "ForceDevice"   "ISDV4"         # Tablet PC ONLY
EndSection
Section "Device"
        Identifier      "ATI Technologies Inc M24 1P [Radeon Mobility X600]"
        Driver          "ati"
        BusID           "PCI:1:0:0"
        Option          "Monitor-DVI-0" "Generic Monitor"
        Option          "Monitor-VGA-0" "Generic Monitor 2"
        Option          "DRI"           "false"
EndSection
Section "Monitor"
        Identifier      "Generic Monitor"
        Option          "DPMS"
EndSection
Section "Monitor"
        Identifier      "Generic Monitor 2"
        Option          "DPMS"
EndSection
Section "Screen"
        Identifier      "Default Screen"
        Device          "ATI Technologies Inc M24 1P [Radeon Mobility X600]"
        Monitor         "Generic Monitor"
        DefaultDepth    24
        SubSection "Display"
                Virtual         3840    2400
                Modes           "1280x1024"
        EndSubSection
EndSection
Section "ServerLayout"
        Identifier      "Default Layout"
        Screen          "Default Screen"
        InputDevice     "Generic Keyboard"
        InputDevice     "Configured Mouse"
        InputDevice     "Synaptics Touchpad"
EndSection


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