Comment 192 for bug 132716

I'm experiencing problems with dual-head setup and xrandr 1.2 on a recent upgrade to Ubuntu 7.10 on my Dell Latitude D810 laptop with docking station. Previously this worked 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 file (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 while the VGA-0 monitor displays "1: Analog Input Cannot Display This Video Mode". The "working" monitor shifts 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)?

The log of this session is attached. Here is my xorg.conf file:

*** BEGIN xorg.conf ***
# xorg.conf (xorg X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
# sudo dpkg-reconfigure -phigh xserver-xorg

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 "LVDSBiosNativeMode" "false"
EndSection

Section "Monitor"
 Identifier "Generic Monitor"
 Option "DPMS"
EndSection

Section "Screen"
 Identifier "Default Screen"
 Device "ATI Technologies Inc M24 1P [Radeon Mobility X600]"
 Monitor "Generic Monitor"
 DefaultDepth 16
 SubSection "Display"
  Virtual 2560 1024
  #Modes "1920x1200"
  Modes "1280x1024"
 EndSubSection
EndSection

Section "ServerLayout"
 Identifier "Default Layout"
 Screen "Default Screen"
 InputDevice "Generic Keyboard"
 InputDevice "Configured Mouse"

# Uncomment if you have a wacom tablet
# InputDevice "stylus" "SendCoreEvents"
# InputDevice "cursor" "SendCoreEvents"
# InputDevice "eraser" "SendCoreEvents"
 InputDevice "Synaptics Touchpad"
EndSection
*** END xorg.conf ***