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New M6500 Discussion Thread

Discussion in 'Dell Latitude, Vostro, and Precision' started by Quido, Dec 1, 2009.

  1. theZoid

    theZoid Notebook Savant

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    When did you order? I'm waiting on my 3/2 order to ship yet. Thanks.
     
  2. giannini

    giannini Notebook Consultant

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    ... and it does not work with Office 2010...
     
  3. tomcom2k

    tomcom2k Notebook Evangelist

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    Its a shame its not configurable to work with something like http://www2.mandriva.com/instanton/

    Bloody pointless otherwise. And boot time is not a long way off boot time of 7 with a SSD.
     
  4. keithsnell

    keithsnell Notebook Consultant

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    Yes, I will try to video the experiment this afternoon. It is actually quite easy to replicate the results once you know the location of the "hidden" sensor. (Left edge of the LCD, about 2 1/2 inches down from the top.) People will be able to see the effect much better if they try this for themselves. Now that I am aware of what is happening, I can see the color tint of the display change in much more subtle lighting than "direct sunlight." Even indirect sunlight through a diffused white window shade will change the screen tint noticeably.

    The good news is that once you get below a certain brightness threshold of ambient light, the colors don't seem to be affected by ambient light. What I have learned from this is that I CANNOT trust my screen colors in moderate to bright lighting conditions, because the color tint of the display is definitely changed by the system based on the "temperature" of the ambient light. (This would also mean that the conditions in which you calibrate the screen would also affect the results.)

    This should be a great big CAUTION to people that are relying on this system for color-critical work.

    Keith
     
  5. penguintree

    penguintree Notebook Enthusiast

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    I cannot replicate this effect. I'm running A02 bios and A01 ATI driver on an RGB LED panel. Is it just Keith, or does everyone else have this? I'm currently very pleased with my display, holding an excellent calibration at 6500K, 2.2 gamma. The only downer is susceptibility to viewing angles - if only it was an IPS it would be just about perfect.

    Paul.
     
  6. keithsnell

    keithsnell Notebook Consultant

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    Hi Paul,

    Thank you for that information. I am currently running the A00 bios and A00 ATI driver (just haven't had time to update yet, and haven't seen the need), so the difference might be there. However, can you check whether you have the Samsung or LG screen? I suspect that might be a significant difference as well.

    Thank you!

    Keith
     
  7. keithsnell

    keithsnell Notebook Consultant

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    Hi Paul,

    I've uploaded a GIF of a gamma 2.2 target that I find very useful for ensuring I have consistent viewing angles for the screen. I just open the file in a color managed viewer and then adjust the angle of the screen so that the inside and outside squares are the same luminosity. (You might need to "squint" to blur the lines a bit on the inside square in order for this to work for you. )

    Keith

    Edit: Actually I've amended this post to provide a link to the Imaging Resource page where you can find the gamma 2.2 target. I didn't want to step over the line with respect to uploading potentially "copyrighted" files to this site.

    Here's the link: http://www.imaging-resource.com/ARTS/MONCAL/CALIBRATE.HTM Scroll down to the "How's Your Contrast" section for the gamma 2.2 target.

    Keith
    www.SpiritofPhotography.com
     
  8. penguintree

    penguintree Notebook Enthusiast

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    I have the Samsung panel. Which one have you got?

    Nice link for the viewing angles BTW, thanks Keith.
     
  9. keithsnell

    keithsnell Notebook Consultant

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    Samsung as well.

    I'll try to find time over the next several days to do the bios and ATI driver updates. I really want to be able to eliminate these inconsistent colors caused by changes in ambient light temperatures.

    Keith

    (I suppose a screen hood would help too.)
     
  10. dezoris

    dezoris Notebook Consultant

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    Order was placed 3/4/2010
    But I am on the large business side. If you did not have your rep expedite ask them to do so it will speed it up.
     
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