Bug 13590

Summary: Dual-head fails with ati driver, appears related to 'crtc'
Product: xorg Reporter: Anthony Brock <anthony.brock>
Component: Driver/RadeonAssignee: xf86-video-ati maintainers <xorg-driver-ati>
Status: RESOLVED DUPLICATE QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium CC: haraldme
Version: unspecified   
Hardware: x86 (IA32)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
X11 log from current session
none
Harald Meland's xorg.conf
none
Harald's X11 log from testing 1:6.7.196+git20071210-0ubuntu0tormod none

Description Anthony Brock 2007-12-10 08:48:00 UTC 
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
Comment 1 Alex Deucher 2007-12-10 09:20:03 UTC 
Please attach your log file.
Comment 2 Anthony Brock 2007-12-10 10:02:21 UTC 
Created attachment 13020 [details]
X11 log from current session
Comment 3 Harald Meland 2007-12-11 05:11:33 UTC 
As reported on launchpad (https://bugs.launchpad.net/bugs/172601) I have a rather similar problem, with the following setup:

  Dell Latitude D610 laptop
  Dockingstation
  2 external monitors, each capable of 1600x1200 (one connected via VGA, and one via DVI)

Tormod Volden requested that I try with the latest version of the driver from his PPA archive (xserver-xorg-video-ati 1:6.7.196+git20071210-0ubuntu0tormod), and post the results/logs.

I had no better luck with this version than with prior versions from Ubuntu Gutsy -- the external monitor that's being driven by CRTC 0 goes black (or displays a monitor-generated warning that it's unable to display the signal it gets, for the DVI-attached monitor) when I try to use its preferred mode, while the monitor being driven by CRTC 1 works fine.  If I swap which external monitor is being driven by which CRTC around, it's always the one driven by CRTC 0 that's unable to display the preferred mode.

I tested this by running "xinit" from a text vt as root, and performing the following commands in the resulting xterm:

# Initial output was on LVDS + DVI-0.

xrandr --output LVDS --off --output VGA-0 --auto
# Monitor LVDS went black, and monitor VGA-0 stayed black.

xrandr --output VGA-0 --off --output LVDS --auto
# Monitor LVDS came alive again.

xrandr --verbose -q > /tmp/xrandr-q.lvds+dvi
xrandr --output LVDS --off --output VGA-0 --auto
xrandr --verbose -q > /tmp/xrandr-q.vga+dvi
# Repeat to get copies of xrandr output.  Monitor VGA-0 still black.

xrandr --output LVDS --off --output VGA-0 --auto --mode 1280x1024
# Monitor VGA-0 now came alive, but with a non-optimal resolution.
xrandr --verbose -q > /tmp/xrandr-q.vga-reduced+dvi
# Capture more xrandr output

xrandr --output VGA-0 --off --output LVDS --auto
# Move back to LVDS, before quitting.

I'll attach my xorg.conf and the X log resulting from this exercise shortly; let me know if there's other data you'd like me to collect.
Comment 4 Harald Meland 2007-12-11 05:13:03 UTC 
Created attachment 13026 [details]
Harald Meland's xorg.conf
Comment 5 Harald Meland 2007-12-11 05:14:47 UTC 
Created attachment 13027 [details]
Harald's X11 log from testing 1:6.7.196+git20071210-0ubuntu0tormod
Comment 6 Alex Deucher 2007-12-11 07:34:29 UTC 
I've fixed this and will be committing it shortly once I've finished testing a few things.  bugs 12913 and 13533 are also related.
Comment 7 Alex Deucher 2007-12-11 07:49:04 UTC 

*** This bug has been marked as a duplicate of bug 12913 ***

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