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E6520 Owner's Thread

Discussion in 'Dell Latitude, Vostro, and Precision' started by pbdavey, Mar 29, 2011.

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  1. danton

    danton Notebook Enthusiast

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    Told you so it was the power management .How the hell did you find how to fix it????
     
    danton, Feb 16, 2012
    #881
  2. danton

    danton Notebook Enthusiast

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    gbour now that you have 60hz always can you check if this reduces baterry life time?
     
    danton, Feb 16, 2012
    #882
  3. gbour

    gbour Notebook Enthusiast

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    Well, Firstly I tried to check registry keys related to graphic cards that were responsible for refresh rate. So I searched Microsoft Knowledge database to find the related keys. But their values were ok. Then, I was convinced, as you told so, that was a power management issue. So, I had to find the power scheme GUID, and I found it using powercfg/list command (GUID is 49EF8FC0-BB7F-488E-B6A0-F1FC77EC649B for Dell Power Scheme). Then I searched registry for this GUID and I found it (path for this GUID is Computer\HKEY_LOCAL_MACHINE\SYSTEM\CONTROLSET002\CONTROL\POWER\USER\DEFAULT\POWERSHEMES\49EF8FC0-BB7F-488E-B6A0-F1FC77EC649B\) . I checked carefully every Key value in this GUID record. I noticed that in 49EF8FC0-BB7F-488E-B6A0-F1FC77EC649B\0012EE47-9041-4B5D-9B77-535FBA8B1442\80E3C60E-BB94-4AD8-BBE0-0D3195EFC663 there are two keys (ACSettingIndex and DCSettingIndex). The value for DCSettingIndex was 0x0000003c which means 60 in decimal system but the value for ACSettingIndex was 0. So I tried to change it to 0x0000003c (60) but I had to change permission. I changed permission as I described before, and changed the value and it worked. That's all. To be honest I was afraid for a hardware problem because some users have described a similar symptom on Linux environment.
     
    gbour, Feb 17, 2012
    #883
  4. gbour

    gbour Notebook Enthusiast

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    Sure, but how? This is going to take some time (months I suppose). Is there any other way (software or something to check battery lifetime)?
     
    gbour, Feb 17, 2012
    #884
  5. bladrak

    bladrak Notebook Consultant

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    thanks for your reply guys:)
     
    bladrak, Feb 18, 2012
    #885
  6. gbour

    gbour Notebook Enthusiast

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    gbour, Feb 18, 2012
    #886
  7. CHRIS_83

    CHRIS_83 Notebook Consultant

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    Thanks, it worked perfectly!

    Which is the best way to add USB3 port?
     
    CHRIS_83, Feb 18, 2012
    #887
  8. dr.pratik

    dr.pratik Notebook Evangelist

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    Expresscard slot which accepts USB 3 adapter.
    That's what I think is best way to.add USB 3 ports.
     
    dr.pratik, Feb 25, 2012
    #888
  9. ranranran

    ranranran Notebook Consultant

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    Just curious, has anyone heard or seen anything to suggest the E6520 will ever get boot support on an SSD plugged into that internal SATA FLASH port?
     
    ranranran, Feb 25, 2012
    #889
  10. CHRIS_83

    CHRIS_83 Notebook Consultant

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    Thank you.

    I have searched it on Ebay and come across 2 models:

    AKE BC618T
    AKE BC398

    Has anybody tried any of them on the E6520/E6420?
    Some do not have the AKE logo, are they cheaper/clone versions?

    Thanks!
     
    CHRIS_83, Feb 26, 2012
    #890
Page 89 of 137
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