Adding/Using HiDPI custom resolutions

Discussion in 'Mavericks Laptop Support' started by RehabMan, May 25, 2014.

  1. RehabMan

    RehabMan Moderator

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    Jul 10, 2018 at 8:16 PM #671
    RehabMan

    RehabMan Moderator

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    Read recent posts to this thread regarding other possible ig-platform-id values...
     
  2. RehabMan

    RehabMan Moderator

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    Jul 10, 2018 at 8:17 PM #672
    RehabMan

    RehabMan Moderator

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    Does it fix itself once you log in?
     
  3. twsps

    twsps

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    Jul 11, 2018 at 3:32 AM #673
    twsps

    twsps

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    No.
     
  4. RehabMan

    RehabMan Moderator

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    Jul 11, 2018 at 3:26 PM #674
    RehabMan

    RehabMan Moderator

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    Try different ig-platform-id values...
     
  5. twsps

    twsps

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    Jul 11, 2018 at 4:02 PM #675
    twsps

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    Which one would you recommend me to try? I have i7-8550U UHD620. Thanks
     
  6. RehabMan

    RehabMan Moderator

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    Jul 11, 2018 at 4:30 PM #676
    RehabMan

    RehabMan Moderator

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    You can get a list of all of them...

    Install Hex Fiend.
    In Terminal:
    Code:
    open -a "Hex Fiend" /System/Library/Extensions/AppleIntelKBLGraphicsFramebuffer.kext/Contents/MacOS/AppleIntelKBLGraphicsFramebuffer
    
    In Hex Fiend, search for a known ig-platform-id, for example, 0x59120000 is hex search for '00 00 12 59'
    Each ig-platform-id is 184 bytes (in this kext and SKL).
    It helps to expand the Hex Fiend window to 23 columns (need a big screen, 184/4/2=23), because then you can see each ig-platform-id lined up vertically (every other row).
    You will find the table starts with 0x591e0000 and the last is 0x591b0006. The 0xFFFFFFFF signifies the end of table.
     
  7. freesby

    freesby

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    Jul 12, 2018 at 4:24 AM #677
    freesby

    freesby

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    Setting DVMT pre alloc to 128M in the BIOS solved the issue, it seems. Only after setting that parameter and removing
    IntelGraphicsDVMTFixup.kext the 1600x900 hiDPI resolution became accessible.
     
    twsps likes this.
  8. RehabMan

    RehabMan Moderator

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    Jul 13, 2018 at 1:21 AM #678
    RehabMan

    RehabMan Moderator

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    Not surprising. Larger DVMT-prealloc usually required when rendering at high resolution.
     
  9. twsps

    twsps

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    Jul 13, 2018 at 1:35 AM #679
    twsps

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    I don't see any DVMT options in my Dell's laptop BIOS.
     
  10. twsps

    twsps

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    Jul 13, 2018 at 1:38 AM #680
    twsps

    twsps

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    Here is the only option I found that may relate. Is it this one?
     

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    • IMG_20180713_083713.jpg  (3.1 MB, 47 views)
    • IMG_20180713_083717.jpg  (2 MB, 44 views)

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