Comando terminale per mostrare display/monitor/risoluzioni connessi?

Question

C'è un modo per ottenere le informazioni sui monitor e display collegati e le loro risoluzioni tramite il terminale in OS X?

Ho alcune installazioni che funzionano su più monitor e talvolta con una finestra GFLW che sembra non aprirsi se un monitor non è collegato - Vorrei avere un controllo per verificare se un monitor è collegato correttamente e forse lo scarico per un file di log, ma non ho trovato un modo programmatico per farlo senza entrare in profondità in Obj-C/Cocoa

Answer 1

È possibile utilizzare system_profiler SPDisplaysDataType o defaults read /Library/Preferences/com.apple.windowserver.plist:

$ system_profiler SPDisplaysDataType 
Graphics/Displays: 

    NVIDIA GeForce GT 640M: 

     Chipset Model: NVIDIA GeForce GT 640M 
     Type: GPU 
     Bus: PCIe 
     PCIe Lane Width: x16 
     VRAM (Total): 512 MB 
     Vendor: NVIDIA (0x10de) 
     Device ID: 0x0fd8 
     Revision ID: 0x00a2 
     ROM Revision: 3707 
     Displays: 
     iMac: 
      Display Type: LCD 
      Resolution: 1920 x 1080 
      Pixel Depth: 32-Bit Color (ARGB8888) 
      Main Display: Yes 
      Mirror: Off 
      Online: Yes 
      Built-In: Yes 
      Connection Type: DisplayPort 
$ defaults read /Library/Preferences/com.apple.windowserver.plist 
{ 
    DisplayResolutionEnabled = 1; 
    DisplaySets =  (
       (
         { 
       Active = 1; 
       Depth = 4; 
       DisplayID = 69731456; 
       DisplayProductID = 40978; 
       DisplaySerialNumber = 0; 
       DisplayVendorID = 1552; 
       Height = 1080; 
       IODisplayLocation = "IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/P0P2@1/IOPCI2PCIBridge/GFX0@0/NVDA,Display-A@0/NVDA"; 
       IOFlags = 7; 
       LimitsHeight = 1080; 
       LimitsOriginX = 0; 
       LimitsOriginY = 0; 
       LimitsWidth = 1920; 
       MirrorID = 0; 
       Mirrored = 0; 
       Mode =     { 
        BitsPerPixel = 32; 
        BitsPerSample = 8; 
        DepthFormat = 4; 
        Height = 1080; 
        IODisplayModeID = "-2147479552"; 
        IOFlags = 7; 
        Mode = 1; 
        PixelEncoding = "--------RRRRRRRRGGGGGGGGBBBBBBBB"; 
        RefreshRate = 0; 
        SamplesPerPixel = 3; 
        UsableForDesktopGUI = 1; 
        Width = 1920; 
        kCGDisplayBytesPerRow = 7680; 
        kCGDisplayHorizontalResolution = 103; 
        kCGDisplayModeIsInterlaced = 0; 
        kCGDisplayModeIsSafeForHardware = 1; 
        kCGDisplayModeIsStretched = 0; 
        kCGDisplayModeIsTelevisionOutput = 0; 
        kCGDisplayModeIsUnavailable = 0; 
        kCGDisplayModeSuitableForUI = 1; 
        kCGDisplayPixelsHigh = 1080; 
        kCGDisplayPixelsWide = 1920; 
        kCGDisplayResolution = 1; 
        kCGDisplayVerticalResolution = 103; 
       }; 
       OriginX = 0; 
       OriginY = 0; 
       PixelEncoding = "--------RRRRRRRRGGGGGGGGBBBBBBBB"; 
       Resolution = 1; 
       Unit = 0; 
       UnmirroredHeight = 1080; 
       UnmirroredLimitsHeight = 1080; 
       UnmirroredLimitsOriginX = 0; 
       UnmirroredLimitsOriginY = 0; 
       UnmirroredLimitsWidth = 1920; 
       UnmirroredMode =     { 
        BitsPerPixel = 32; 
        BitsPerSample = 8; 
        DepthFormat = 4; 
        Height = 1080; 
        IODisplayModeID = "-2147479552"; 
        IOFlags = 7; 
        Mode = 1; 
        PixelEncoding = "--------RRRRRRRRGGGGGGGGBBBBBBBB"; 
        RefreshRate = 0; 
        SamplesPerPixel = 3; 
        UsableForDesktopGUI = 1; 
        Width = 1920; 
        kCGDisplayBytesPerRow = 7680; 
        kCGDisplayHorizontalResolution = 103; 
        kCGDisplayModeIsInterlaced = 0; 
        kCGDisplayModeIsSafeForHardware = 1; 
        kCGDisplayModeIsStretched = 0; 
        kCGDisplayModeIsTelevisionOutput = 0; 
        kCGDisplayModeIsUnavailable = 0; 
        kCGDisplayModeSuitableForUI = 1; 
        kCGDisplayPixelsHigh = 1080; 
        kCGDisplayPixelsWide = 1920; 
        kCGDisplayResolution = 1; 
        kCGDisplayVerticalResolution = 103; 
       }; 
       UnmirroredOriginX = 0; 
       UnmirroredOriginY = 0; 
       UnmirroredResolution = 1; 
       UnmirroredWidth = 1920; 
       Width = 1920; 
      } 
     ) 
    ); 
    ForceOldStyleMemoryManagement = 0; 
}