2 Replies Latest reply on Jul 14, 2009 12:45 AM by trenchtractor

    Problem: No DVI-D output; GMA4500MHD - LG L204WT - Dell E6500

    trenchtractor

      I have 1 x LG L194WT, 2 x L204WT's and I can't get DVI to work with any of them... not properly anyway.  I want to use the two L204WT's with the DVI output, I've only been using the L194WT for testing to try and help diagnose the problem.
      I can get 800x600 video to them, but with 1440x900 and 1680x1050 native resolutions respectively, that's pretty pointless...  When I set the video to the native resolution, the monitors are enabled (ie, they come out of standby) but are totally black.  They are recognised by the OS just fine.
      I'm using a Dell E6500, with PR02X dock, with dual DVI-D outputs... monitors are DVI-D input.  I'm using dual link DVI-D cable (all pins bar the analogue ones).  Intel number is GMA4500MHD.  I'm using the latest video driver (7.15.10.1637) from the Dell website, the driver from Intel website doesn't work and tells me to use the manufacturer driver pack.  OS is vista 64. (Update: I've just installed W7 7100 and all updates without improvement)
      Here's the dump for the L204WT from Moninfo...
      Monitor
      Model name............... L204WT
      Manufacturer............. LGE
      Plug and Play ID......... GSM4E48
      Serial number............ 341125
      Manufacture date......... 2007, ISO week 9
      -------------------------
      EDID revision............ 1.3
      Input signal type........ Digital
      Color bit depth.......... Undefined
      Display type............. RGB color
      Screen size.............. 430 x 270 mm (20.0 in)
      Power management......... Standby, Suspend, Active off/sleep
      Extension blocs.......... None
      -------------------------
      DDC/CI................... Supported
      MCCS revison............. 2.0
      Display technology....... TFT
      Controller............... Not supported
      Firmware revision........ 0.1
      Firmware flags........... 0x68
      Active power on time..... Not supported
      Current frequency........ Not supported

       

      Color characteristics
      Default color space...... Non-sRGB
      Display gamma............ 2.20
      Red chromaticity......... Rx 0.651 - Ry 0.333
      Green chromaticity....... Gx 0.277 - Gy 0.614
      Blue chromaticity........ Bx 0.145 - By 0.082
      White point (default).... Wx 0.313 - Wy 0.329
      Additional descriptors... None

       

      Timing characteristics
      Horizontal scan range.... 28-83kHz
      Vertical scan range...... 56-75Hz
      Video bandwidth.......... 150MHz
      CVT standard............. Not supported
      GTF standard............. Not supported
      Additional descriptors... None
      Preferred timing......... Yes
      Native/preferred timing.. 1680x1050p at 60Hz
      Modeline............... "1680x1050" 146.250 1680 1784 1960 2240 1050 1053 1059 1089 -hsync +vsync

       

      Standard timings supported
      720 x 400p at 70Hz - IBM VGA
      640 x 480p at 60Hz - IBM VGA
      640 x 480p at 75Hz - VESA
      800 x 600p at 56Hz - VESA
      800 x 600p at 60Hz - VESA
      800 x 600p at 75Hz - VESA
      832 x 624p at 75Hz - Apple Mac II
      1024 x 768p at 60Hz - VESA
      1024 x 768p at 75Hz - VESA
      1280 x 1024p at 75Hz - VESA
      1152 x 870p at 75Hz - Apple Mac II
      1280 x 1024p at 60Hz - VESA STD
      1280 x 960p at 60Hz - VESA STD
      1152 x 864p at 75Hz - VESA STD

       

      Report information
      Date generated........... 10/07/2009
      Software revision........ 2.30.0.797
      Operating system......... 6.0.6001.2.Service Pack 1

       

      Raw data
      00,FF,FF,FF,FF,FF,FF,00,1E,6D,48,4E,85,34,05,00,09,11,01,03,EA,2B,1B,78,EA,D1,05,A6,55,47,9D,25,
      15,50,54,A7,6B,80,01,01,81,80,81,40,71,4F,01,01,01,01,01,01,01,01,21,39,90,30,62,1A,27,40,68,B0,
      36,00,B2,0E,11,00,00,1C,00,00,00,FD,00,38,4B,1C,53,0F,00,0A,20,20,20,20,20,20,00,00,00,FC,00,4C,
      32,30,34,57,54,0A,20,20,20,20,20,20,00,00,00,FC,00,0A,20,20,20,20,20,20,20,20,20,20,20,20,00,ED
      I'm hoping to get some support on this one... Dell support appears mostly useless.
      Cheers
      Brad

        • 1. Re: Problem: No DVI-D output; GMA4500MHD - LG L204WT - Dell E6500
          trenchtractor

          Ok... further development...

           

          I've tried messing with the media accelerator settings... but it's no better.

           

          I am getting the monitor OSD message saying the frequency is out of range.  The manual recommends H-> 64.674 KHz and V-> 60.0 Hz.  The specification says the range is H-> 28-83kHz, V-> 56-75Hz.

           

          The thing that's weird is that the display doesn't go into standby... so it's obviously getting something from the display driver.

           

          I'm not sure where to go from here.  I think I'm going to print of a bunch of stuff and try and figure out if there's something in the registry I can tweak over the next few days.

          • 2. Re: Problem: No DVI-D output; GMA4500MHD - LG L204WT - Dell E6500
            trenchtractor

            I WIN!

             

            I've found the solution to my problem... I was using DVI-D Dual link cables.  Took the monitors to a computer guy today for some back to back testing and to verify my problem... he tested my monitors with my leads and it totally failed exactly the same as on my computer at home.

             

            Then he pulled out a single link DVI-D cable and PRESTO!  Instant video at the correct resolution.

             

            So it seems that while the dual link cable will tell the monitor to expect a picture, the picture goes missing along the way.

             

            Anyway, solved my own problem... bought 3 x DVI-D single link cables and I have all three monitors working perfectly.