Forked from mauricerkelly/1-Force RGB mode for OS X.md
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June 24, 2014 15:06
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| This Gist contains the script and generated output file for an Acer B276HUL. | |
| To "install" the output file, put it in `/System/Library/Displays/Overrides/DisplayVendorID-472` |
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| <?xml version="1.0" encoding="UTF-8"?> | |
| <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> | |
| <plist version="1.0"> | |
| <dict> | |
| <key>DisplayProductName</key> | |
| <string>Acer B276HUL - forced RGB mode (EDID override)</string> | |
| <key>IODisplayEDID</key> | |
| <data>AP///////wAEcmEDs0xgMhoXAQS1PCJ4Ikt1p1ZLoyUKUFS9SwDRANHAgYCV | |
| D5UAswCBwKlAVl4AoKCgKVAwIDUAVVAhAAAeAAAA/QAXTA9jFgEKICAgICAg | |
| AAAA/wBMWjJFRTAwMTQyMDAKAAAA/ABBY2VyIEIyNzZIVUwKAGM= | |
| </data> | |
| <key>DisplayVendorID</key> | |
| <integer>1138</integer> | |
| <key>DisplayProductID</key> | |
| <integer>865</integer> | |
| </dict> | |
| </plist> |
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| #!/usr/bin/ruby | |
| # Create display override file to force Mac OS X to use RGB mode for Display | |
| # see http://embdev.net/topic/284710 | |
| require 'base64' | |
| data=`ioreg -l -d0 -w 0 -r -c AppleDisplay` | |
| edids=data.scan(/IODisplayEDID.*?<([a-z0-9]+)>/i).flatten | |
| vendorids=data.scan(/DisplayVendorID.*?([0-9]+)/i).flatten | |
| productids=data.scan(/DisplayProductID.*?([0-9]+)/i).flatten | |
| displays = [] | |
| edids.each_with_index do |edid, i| | |
| disp = { "edid_hex"=>edid, "vendorid"=>vendorids[i].to_i, "productid"=>productids[i].to_i } | |
| displays.push(disp) | |
| end | |
| # Process all displays | |
| if displays.length > 1 | |
| puts "Found %d displays! You should only install the override file for the one which" % displays.length | |
| puts "is giving you problems.","\n" | |
| end | |
| displays.each do |disp| | |
| # Retrieve monitor model from EDID data | |
| monitor_name=[disp["edid_hex"].match(/000000fc00(.*?)0a/){|m|m[1]}.to_s].pack("H*") | |
| if monitor_name.empty? | |
| monitor_name = "Display" | |
| end | |
| puts "found display '#{monitor_name}': vendorid #{disp["vendorid"]}, productid #{disp["productid"]}, EDID:\n#{disp["edid_hex"]}" | |
| bytes=disp["edid_hex"].scan(/../).map{|x|Integer("0x#{x}")}.flatten | |
| puts "Setting color support to RGB 4:4:4 only" | |
| bytes[24] &= ~(0b11000) | |
| puts "Number of extension blocks: #{bytes[126]}" | |
| puts "removing extension block" | |
| bytes = bytes[0..127] | |
| bytes[126] = 0 | |
| bytes[127] = (0x100-(bytes[0..126].reduce(:+) % 256)) % 256 | |
| puts | |
| puts "Recalculated checksum: 0x%x" % bytes[127] | |
| puts "new EDID:\n#{bytes.map{|b|"%02X"%b}.join}" | |
| Dir.mkdir("DisplayVendorID-%x" % disp["vendorid"]) rescue nil | |
| f = File.open("DisplayVendorID-%x/DisplayProductID-%x" % [disp["vendorid"], disp["productid"]], 'w') | |
| f.write '<?xml version="1.0" encoding="UTF-8"?> | |
| <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> | |
| <plist version="1.0">' | |
| f.write " | |
| <dict> | |
| <key>DisplayProductName</key> | |
| <string>#{monitor_name} - forced RGB mode (EDID override)</string> | |
| <key>IODisplayEDID</key> | |
| <data>#{Base64.encode64(bytes.pack('C*'))}</data> | |
| <key>DisplayVendorID</key> | |
| <integer>#{disp["vendorid"]}</integer> | |
| <key>DisplayProductID</key> | |
| <integer>#{disp["productid"]}</integer> | |
| </dict> | |
| </plist>" | |
| f.close | |
| puts "\n" | |
| end # displays.each |
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