External CRT Monitor Detected as LCD

Discussion in 'MacBook Air' started by scizor000, Feb 9, 2015.

  1. scizor000 macrumors newbie

    Joined:
    Feb 9, 2015
    #1
    I've been having issues hooking up my early 2014 13" MBA to an external CRT monitor (a Samsung SyncMaster 997DF) with a ThunderBolt to VGA adapter. The text appears blurry, and even more so the higher the resolution and refresh rate. When I went to "About this Mac" and clicked System Report, and proceeded to Graphics/Displays it seems to have detected as an LCD. Is there any way to fix this? Here's the information under Graphics/Displays (note, I changed the resolution to 768 as it isn't as blurry, native is 1600x1200 w/ 76hz refresh rate):

    Intel HD Graphics 5000:

    Chipset Model: Intel HD Graphics 5000
    Type: GPU
    Bus: Built-In
    VRAM (Dynamic, Max): 1536 MB
    Vendor: Intel (0x8086)
    Device ID: 0x0a26
    Revision ID: 0x0009
    Displays:
    Color LCD:
    Display Type: LCD
    Resolution: 1024 x 768
    Pixel Depth: 32-Bit Color (ARGB8888)
    Mirror: On
    Mirror Status: Hardware Mirror
    Online: Yes
    Built-In: Yes
    SyncMaster:
    Resolution: 1024 x 768 @ 60 Hz
    Pixel Depth: 32-Bit Color (ARGB8888)
    Display Serial Number: HCGX902750
    Main Display: Yes
    Mirror: On
    Mirror Status: Master Mirror
    Online: Yes
    Rotation: Supported
    Adapter Type: Apple Mini DisplayPort To VGA Adapter
    Adapter Firmware Version: 1.03
     
  2. motrek macrumors 68020

    Joined:
    Sep 14, 2012
    #2
    Your adapter does the conversion from digital (Thunderbolt/DisplayPort) to analog (VGA) and is thus responsible for image quality and conveying identification information from the monitor.

    Any problems you're having with the setup should probably be blamed on the adapter. Sorry. Maybe you can return it?
     
  3. poiihy macrumors 68020

    poiihy

    Joined:
    Aug 22, 2014
    #3
    The "LCD" stuff you see refers to the "Color LCD" which is the built-in screen of your MBA. The SyncMaster is recognized correctly, even though it says nothing about CRT, because it shows "@ 60 Hz" which only apply to CRTs.

    As for the blurry image, could be the adaptor... I don't know.
     

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