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Thread: Resolution 1680 x 1050 for external monitor does not work

  1. #31
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    Default Re: Resolution 1680 x 1050 for external monitor does not work

    from the information given your files should look something like the following,

    /etc/X11/xorg.conf.d/50-device.conf
    Code:
    Section "ServerLayout"
        Identifier     "aticonfig Layout"
        Screen      0  "aticonfig-Screen[1]-0" 0 0
    EndSection
    
    Section "Module"
        Load  "glx"
    EndSection
    
    Section "Device"    Identifier  "aticonfig-Device[1]-0"
        Driver      "radeonhd"
        Option        "Monitor-PANEL-0" "PANEL-0"
        Option        "Monitor-DVI-D_1" "DVI-D_1"
    # lspci: 01:00.0 VGA compatible controller: ATI Technologies Inc M76 [Radeon Mobility HD 2600 Series]
        BusID       "PCI:1:0:0"
    EndSection
    /etc/X11/xorg.conf.d/
    Code:
    Section "Monitor"
    # xrandr:    PANEL connected 1280x800+0+0 338mm x 211mm
        Identifier  "PANEL-0"
        Option        "VendorName" "ATI Open source Driver"
        Option        "ModelName" "Generic Autodetecting Monitor"
        Option        "DPMS" "true"
        Option        "PreferredMode" "1280x800"
        Option        "TargetRefresh" "60"
        Option        "Position" "0 0"
        Option        "Rotate" "normal"
        Option        "Disable" "false"
    EndSection
    
    Section "Monitor"
    # xrandr -q:    DVI-D_1 connected
        Identifier  "DVI-D_1"
        Option        "VendorName" "ATI Open Source Driver"
        Option        "ModelName" "Generic Autodetecting Monitor"
        Option        "DPMS" "true"
        Option        "PreferredMode" "1680x1050"
        Option        "TargetRefresh" "60"
        Option        "Position" "0 0"
        Option        "Rotate" "normal"
        Option        "Disable" "false"
    EndSection
    /etc/X11/xorg.conf.d/50-screen.conf
    Code:
    Section "Screen"
    # Identifier "Default Screen"
    
    #  Device "Default Device"
    
      # Doesn't help for radeon/radeonhd drivers; use magic in
      # 50-device.conf instead
      #  Monitor "Default Monitor"
    
    # xrandr:    Screen 0: minimum 320 x 200, current 1280 x 800, maximum 3840 x 1920
        Identifier "aticonfig-Screen[1]-0"
        Device     "aticonfig-Device[1]-0"
        DefaultDepth     24
        SubSection "Display"
            Viewport   0 0
    #        Virtual   2960 1050
            Depth     24
        EndSubSection
    EndSection
    If with the above things look about right,
    set things up with --System Settings --Display and Monitor

  2. #32
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    Default Re: Resolution 1680 x 1050 for external monitor does not work

    Quote Originally Posted by icediver View Post
    This is the boot parameter line at grub:
    vga=0x317 1024x768x16

    the setup is 16 bit colour, so its ok

    the colour depth will be modified as given in the files above anyway

  3. #33
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    Default Re: Resolution 1680 x 1050 for external monitor does not work

    Quote Originally Posted by icediver View Post
    @oldcpu: I tested xrandr - but setting the resolution with it did not work either.
    Exactly WHAT xrandr commands did you send ? The page Xorg RandR 1.2 - ThinkWiki gives some guidance ...

    ie don't just send 'xrandr' but try things like:
    Code:
    xrandr --output DVI-D_1 --auto --output PANEL --auto --same-as DVI-D_1
    or
    Code:
    xrandr --output DVI-D_1 --mode 1680x1050 --output PANEL --mode 1680x1050
    I can not do this experimentation, as I do not have the hardware, nor do I have experience with DVI-D_1 nor PANEL. There are many examples (to give ideas) on that page Xorg RandR 1.2 - ThinkWiki
    Last edited by oldcpu; 24-Jan-2012 at 23:08.

  4. #34
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    Default Re: Resolution 1680 x 1050 for external monitor does not work

    Quote Originally Posted by oldcpu View Post
    I can not do this experimentation, as I do not have the hardware, nor do I have experience with DVI-D_1 nor PANEL. There are many examples (to give ideas) on that page Xorg RandR 1.2 - ThinkWiki
    Its possible that instead of using 'PANEL' in the xrandr command you may need to use 'LVDS' even though it is not stated in the basic 'xrandr' output. That's speculation on my part (I've not seen 'PANEL' before).

  5. #35
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    Default Re: Resolution 1680 x 1050 for external monitor does not work

    Quote Originally Posted by oldcpu View Post
    Exactly WHAT xrandr commands did you send ? The page Xorg RandR 1.2 - ThinkWiki gives some guidance ...

    ie don't just send 'xrandr' but try things like:
    Code:
    xrandr --output DVI-D_1 --auto --output PANEL --auto --same-as DVI-D_1
    I may have the order backward there, and maybe it should be:
    Code:
    xrandr --output PANEL --auto --output DVD-D_1 --auto --same-as PANEL
    or
    Code:
    xrandr --output LVDS --auto --output DVD-D_1 --auto --same-as LVDS

  6. #36
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    Default Re: Resolution 1680 x 1050 for external monitor does not work

    Quote Originally Posted by oldcpu View Post
    I've not seen 'PANEL' before
    Using PANEL works (LVDS doesn't)...so it should be ok

    Using your commands the problem occurs anyhow (I also tried some Fn+F8 switches but without avail)

    Quote Originally Posted by keellambert View Post
    from the information given your files should look something like the following,
    ...
    If with the above things look about right,
    set things up with --System Settings --Display and Monitor
    I filled the files with your lines (saved them), rebooted and set the resolution using system settings (and I also tried the posted xrandr commands). The problem persists

  7. #37
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    Default Re: Resolution 1680 x 1050 for external monitor does not work

    Sorry, no further suggestions.

  8. #38
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    Default Re: Resolution 1680 x 1050 for external monitor does not work

    Afterthought, could you post the latest contents of /var/log/Xorg.0.log

  9. #39
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    Default Re: Resolution 1680 x 1050 for external monitor does not work

    I booted with the external monitor on and connected and tried to set the resolution via system settings and tried some Fn+F8 switches. This is the resulting Xorg.0.log: SUSE Paste

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