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Thread: fglrx, multimonitor - secondary monitor on the left problem

  1. #1
    Join Date
    Sep 2012
    Location
    Canada
    Beans
    51
    Distro
    Ubuntu 12.10 Quantal Quetzal

    fglrx, multimonitor - secondary monitor on the left problem

    Hello all! I'm having some difficulty with setting up my monitors as I would like them, I'll try to provide as much info as I can to diagnose the problem.

    What I want is my Laptop screen(LVDS) to be on the right, and my CRT to be on the left, here is what my xorg.conf looks like:

    [ryan@ubuntop X11]$ cat xorg.conf
    Section "ServerLayout"
    Identifier "aticonfig Layout"
    Screen 0 "aticonfig-Screen[0]-0" 0 0
    EndSection

    Section "Module"
    EndSection

    Section "Monitor"
    Identifier "aticonfig-Monitor[0]-0"
    Option "VendorName" "ATI Proprietary Driver"
    Option "ModelName" "Generic Autodetecting Monitor"
    Option "DPMS" "true"
    EndSection

    Section "Monitor"
    Identifier "0-LVDS"
    Option "VendorName" "ATI Proprietary Driver"
    Option "ModelName" "Generic Autodetecting Monitor"
    Option "DPMS" "true"
    Option "PreferredMode" "1366x768"
    Option "TargetRefresh" "60"
    Option "Position" "1024 0"
    Option "Rotate" "normal"
    Option "Disable" "false"
    EndSection

    Section "Monitor"
    Identifier "0-CRT1"
    Option "VendorName" "ATI Proprietary Driver"
    Option "ModelName" "Generic Autodetecting Monitor"
    Option "DPMS" "true"
    Option "PreferredMode" "1024x768"
    Option "TargetRefresh" "85"
    Option "Position" "0 0"
    Option "Rotate" "normal"
    Option "Disable" "false"
    EndSection

    Section "Device"
    Identifier "aticonfig-Device[0]-0"
    Driver "fglrx"
    Option "Monitor-LVDS" "0-LVDS"
    Option "Monitor-CRT1" "0-CRT1"
    BusID "PCI:0:1:0"
    EndSection

    Section "Screen"
    Identifier "aticonfig-Screen[0]-0"
    Device "aticonfig-Device[0]-0"
    DefaultDepth 24
    SubSection "Display"
    Viewport 0 0
    Virtual 2966 2966
    Depth 24
    EndSubSection
    EndSection


    That works! I get what I want: The CRT on the left, and my Laptop screen on the right. Perfect! Or so it would seem...


    When the CRT is disconnected and disabled, everything works as usual. That is, until the computer is put into suspend and then woken up - the entire screen is shifted to the left by 1024 pixels. The mouse cannot go to the right side of the screen, it pushes against that 1024 pixel boundry like it was the edge of the screen. When I go into a tty, I am able to kill the X server. When it returns, everything is fine.

    Note: this only happens when the CRT is disabled. If it is disconnected but still enabled, resuming from suspend works as normal.


    As a workaround I have "moved" the CRT to be beneath the laptop screen, and that works. Any ideas? Is this just a bug in the catalyst drivers? I've experienced this on multiple distros, so I know it isn't just a Ubuntu problem, but I'd appreciate the help! Thanks.
    Last edited by unheeding; February 12th, 2013 at 06:04 AM. Reason: minor detail edit

  2. #2
    Join Date
    Sep 2012
    Location
    Canada
    Beans
    51
    Distro
    Ubuntu 12.10 Quantal Quetzal

    Re: fglrx, multimonitor - secondary monitor on the left problem

    Bump. I'd really like some answers! Thanks.

  3. #3
    Join Date
    May 2008
    Beans
    213
    Distro
    Lubuntu

    Re: fglrx, multimonitor - secondary monitor on the left problem

    I think the problem is because you set the monitor as your primary display by setting its viewport to '0 0'. Your laptop screen should be the main screen "viewport 0 0".

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