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Thread: Samsung SyncMaster 2243NW Resolution Problem

  1. #1
    Join Date
    Feb 2011
    Location
    Athens, Greece
    Posts
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    Default Samsung SyncMaster 2243NW Resolution Problem

    Hello all.
    After searching the forums couldnt find a solution to my problem so decided to make a post to ask for your help.

    I installed 11.3 open SuSE x86_64, with the build in drivers I could apply resolution 1680x1050 @ 60.
    When I am installing the proprietary Catalyst 10.12 maximum resolution is set to 1600x1200.

    I have tried the workarounds found in the forum with no joy.

    It is my belief that the problem resides on the incapability of the system to read or even retrieve the EDID information form the monitor.

    I am using:
    AMD Athlon 7550 Dual-Core
    ATI Radeon HD 3850


    Code:
    xorg.conf file:
    Section "ServerLayout"
    	Identifier     "aticonfig Layout"
    	Screen      0  "aticonfig-Screen[0]-0" 0 0
    	Screen         "aticonfig-Screen[0]-1" RightOf "aticonfig-Screen[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   "aticonfig-Monitor[0]-1"
    	Option	    "VendorName" "ATI Proprietary Driver"
    	Option	    "ModelName" "Generic Autodetecting Monitor"
    	Option	    "DPMS" "true"
    EndSection
    
    Section "Device"
    	Identifier  "aticonfig-Device[0]-0"
    	Driver      "fglrx"
    	BusID       "PCI:1:0:0"
    EndSection
    
    Section "Device"
    	Identifier  "aticonfig-Device[0]-1"
    	Driver      "fglrx"
    	BusID       "PCI:1:0:0"
    	Screen      1
    EndSection
    
    Section "Screen"
    	Identifier "aticonfig-Screen[0]-0"
    	Device     "aticonfig-Device[0]-0"
    	Monitor    "aticonfig-Monitor[0]-0"
    	DefaultDepth     24
    	SubSection "Display"
    		Viewport   0 0
    		Depth     24
    	EndSubSection
    EndSection
    
    Section "Screen"
    	Identifier "aticonfig-Screen[0]-1"
    	Device     "aticonfig-Device[0]-1"
    	Monitor    "aticonfig-Monitor[0]-1"
    	DefaultDepth     24
    	SubSection "Display"
    		Viewport   0 0
    		Depth     24
    	EndSubSection
    EndSection
    Code:
    xrandr output:
    Screen 0: minimum 320 x 200, current 1440 x 900, maximum 1600 x 1600
    DFP1 disconnected (normal left inverted right x axis y axis)
    DFP2 disconnected (normal left inverted right x axis y axis)
    CRT1 disconnected (normal left inverted right x axis y axis)
    CRT2 connected 1440x900+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
       1600x1200      60.0 +
       1400x1050      60.0  
       1280x1024      60.0     47.0     43.0  
       1440x900       59.9* 
       1280x960       60.0  
       1280x800       60.0  
       1152x864       60.0     47.0     43.0  
       1280x768       59.9     56.0  
       1280x720       60.0     50.0  
       1024x768       60.0     43.5  
       800x600        60.3     56.2     47.0  
       720x576        50.0  
       720x480        60.0  
       640x480        60.0  
    TV disconnected (normal left inverted right x axis y axis)
    CV disconnected (normal left inverted right x axis y axis)
    Xorg.0.log


    Before installing Catalyst drivers the monitor was detected as Samsung 21". After installing the drivers the monitor is detected as unknown.
    I used the script ati upgrade to install the drivers.

    Also dont know if its any use but when running Computer>YaST>Hardware Information, I get accurate information about the monitor including all the supported resolutions. However when I save to file this is what I get:
    Code:
    62: None 00.0: 10000 Monitor
      [Created at fb.71]
      Unique ID: rdCR.EY_qmtb9YY0
      Hardware Class: monitor
      Model: "Generic Monitor"
      Vendor: "Generic"
      Device: "Monitor"
      Resolution: 1600x1200@77Hz
      Driver Info #0:
        Max. Resolution: 1600x1200
        Vert. Sync Range: 50-90 Hz
        Hor. Sync Range: 31-96 kHz
      Config Status: cfg=new, avail=yes, need=no, active=unknown
    I have tried to edit the xorg.conf file but nothing changed. I might not doing it right however so any suggestion would be welcomed.

    If there is any need for more input I would be glad to provide it.
    Thanks for your time and help in advance.

  2. #2
    Join Date
    Jun 2008
    Location
    Earth - Denmark
    Posts
    11,210

    Default Re: Samsung SyncMaster 2243NW Resolution Problem

    On 02/02/2011 02:36 PM, k-a wrote:
    > I installed 11.3 open SuSE x86_64, with the build in drivers I could
    > apply resolution 1680x1050 @ 60.


    you didn't happen to have had that monitor hooked up to the same
    graphics chip with an earlier version of openSUSE (or other Linux) did
    you?

    and, maybe have a copy of the xorg.conf still sitting in a backup
    archive somewhere?

    --
    DenverD
    CAVEAT: http://is.gd/bpoMD
    [NNTP posted w/openSUSE 11.3, KDE4.5.5, Thunderbird3.0.11, nVidia
    173.14.28 3D, Athlon 64 3000+]
    "It is far easier to read, understand and follow the instructions than
    to undo the problems caused by not." DD 23 Jan 11

  3. #3
    Join Date
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    Location
    Athens, Greece
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    Default Απ: Re: Samsung SyncMaster 2243NW Resolution Problem

    Quote Originally Posted by DenverD View Post
    you didn't happen to have had that monitor hooked up to the same
    graphics chip with an earlier version of openSUSE (or other Linux) did
    you?

    and, maybe have a copy of the xorg.conf still sitting in a backup
    archive somewhere?
    Nope. Unfortunately no. I had similar issues with Windows instalation though. 1280x1050 resolution was not detected neither the Monitor. Easy fix was to install monitor drivers so the monitor would be identified correctly and the resolution would be enabled. Cant find linux drivers for the monitor though.

  4. #4
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    Default Απ: Re: Samsung SyncMaster 2243NW Resolution Problem

    I did a bit more reading and apparently when using fglrx drivers they do not read the xorg.conf file unless you tell them to.
    That actually explaines why the changes I did in xorg.conf had no impact.

    So either I have to set up teh Catalyst drivers through aticonfig, which is a problem as I cant find the manual and aticonfig --help just generates way too many pages to handle, or i have to edit xorg.conf and then use "aticonfig --input=/etc/X11/xorg.conf" to make the drivers read and take the settings form the file.

    I will have a go and keep this thread updated.
    Any guidance would be greatly appreciated as it is the first time I come across such a problem.
    Thanks.

  5. #5
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    Default Re: Απ: Re: Samsung SyncMaster 2243NW Resolution Problem

    I did a bit more reading and apparently when using fglrx drivers they do not read the xorg.conf file unless you tell them to.
    That actually explaines why the changes I did in xorg.conf had no impact.
    You're correct in that xorg.conf is not actually required as far as Xorg is concerned, however any entries you do add will be used (where applicable). The configuration sections have now been split up into separate files, and reside in /etc/X11/xorg.conf.d/ directory, and can be edited if necessary. These Samsung Syncmasters seem to be notorious for EDID issues.

    The native resolution for this model is 1680x1050 (based on the specs I found via Google), so the open source driver actually provided the correct display mode.

    For the fglrx driver, I found this page which you may want to read first. It looks like this is dependant on the driver version you're using, so you may need to uninstall, then change versions if possible. (I don't use this driver now because of old ATI hardware, so I can't really advise specifically on this).

    You could try adjusting the xorg.conf you created with aticonfig. (You'll need to edit it with root permissions). If using KDE4

    Code:
    kdesu kwrite /etc/X11/xorg.conf
    For Gnome

    Code:
    gnomesu gedit /etc/X11/xorg.conf
    Add the required modeline to the monitor section

    Code:
    Modeline "1680x1050" 119.0 1680 1728 1760 1840 1050 1053 1059 1080
    and in the screen section, make sure it has this mode reference

    Code:
    Section "Screen"
        Identifier "Default Screen"
        
        DefaultDepth     24
        SubSection "Display"
            Viewport  0 0
            Depth     24
            Modes    "1680x1050"
        EndSubSection
    EndSection
    You may also need to disable DDC (device section) with

    Code:
    Option "NoDDC"   "yes"
    When finished editing, save and restart the X-server with CTRL-ALT-Backspace (twice).

    See how that goes.
    Last edited by deano_ferrari; 02-Feb-2011 at 11:36.

  6. #6
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    Default Απ: Re: Απ: Re: Samsung SyncMaster 2243NW Resolution Problem

    Thanks for the response and for your time mate.

    I spend a lot of time, approximately 4 days, attempting to solve the problem with procedures as you described, before I made this post. Unfortunately the changes I did in xorg.conf file did not seem to apply.

    I am still in process on the path of the solution I described above.
    Edit xorg.conf file and use "aticonfig --input=/etc/X11/xorg.conf" to pass the changes to Catalyst.

    Basically I need to edit the xorg.conf correctly which is the problem atm since the information are scattered all over the internet and it takes time. At least for me that I am not familiar with the syntax of xorg.conf and its contents.

    I wonder if I could discard the xorg.conf and edit the contents of /etc/X11/xorg.conf.d directory instead. How would I pass the contents of these files in Catalyst configuration though?

    EDIT: Yes the native resolution is 1680x1050 @ 60.

  7. #7
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    Default Απ: Re: Απ: Re: Samsung SyncMaster 2243NW Resolution Problem

    Ok so I made the changes in xorg.conf.
    Restarted and no change.
    Went in level 3 as root used the aticonfig --input=etc/X11/xorg.conf command and still no change in the available resolutions or the default one.

    I will remove the xorg.conf and make the same changes in the appropriate files in /etc/X11/xorg.conf.d/ directory.

    Ill report any progress.

    EDIT: During the attempts to edit the xorg.conf I made some mistakes with frequency changes which resulted in X server to fail to initiate due to monitor errors. That tells me that the changes actually took place but the monitor could not response. After removing the frequency ranges X server starts but no change seems to be applied.

  8. #8
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    Default Απ: Re: Απ: Re: Samsung SyncMaster 2243NW Resolution Problem

    I made the changes in the appropriate files in xorg.conf.d directory but x server could not start.
    I moved 50-screen.conf file to another directory and X server was able to start.

    Maybe the answer is to try and somehow feed the system the information from EDID file? Is that possible?

  9. #9
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    Default Απ: Re: Απ: Re: Samsung SyncMaster 2243NW Resolution Problem

    Apparently the cause of pain to me and to others with same monitor is the fact that the monitor has only D-sub input.
    Most Graphic Cards have DVI outputs so you need an adapter to connect the monitor cable to the output of the Graphic Card.
    The adapter somehow interferes with the way the EDID data are transferred by request to the system.

    I found some information on how to retrieve the EDID data and save it to an .INF file.
    I guess that would be my next approach.

  10. #10
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    Default Re: Απ: Re: Απ: Re: Samsung SyncMaster 2243NW Resolution Problem

    Maybe the answer is to try and somehow feed the system the information from EDID file? Is that possible?
    No, unfortunately only the nvidia proprietary driver allows you to do this.

    However, the other drivers typically allow one to disable EDID and use manual modelines etc. For fglrx I think these options are available:

    Code:
    Option "IgnoreEdid" "true"
    Option "UseEdidFreqs" "false"
    Option "NoDDC" "true"
    (I have read of accounts where modelines weren’t honoured by the driver, but you'd need to check this for yourself with experimentation).

    You may also need to adjust /etc/X11/xorg.conf.d/50-monitor.conf (or /etc/X11/xorg.conf if thats what you're using) to make sure that these lines are uncommented (no # character)

    Code:
    HorizSync 28-85
    VertRefresh 50-100

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