sudo get-edid | parse-edid
This is read-edid version 3.0.2. Prepare for some fun.
Attempting to use i2c interface
Looks like no busses have an EDID. Sorry!
Attempting to use the classical VBE interface

        Performing real mode VBE call
        Interrupt 0x10 ax=0x4f00 bx=0x0 cx=0x0
        Function supported
        Call successful

        VBE version 300
        VBE string at 0xc01e4 "AMD ATOMBIOS"

VBE/DDC service about to be called
        Report DDC capabilities

        Performing real mode VBE call
        Interrupt 0x10 ax=0x4f15 bx=0x0 cx=0x0
        Function supported
        Call successful

        Monitor and video card combination does not support DDC1 transfers
        Monitor and video card combination supports DDC2 transfers
        0 seconds per 128 byte EDID block transfer
        Screen is not blanked during DDC transfer

Reading next EDID block

VBE/DDC service about to be called
        Read EDID

        Performing real mode VBE call
        Interrupt 0x10 ax=0x4f15 bx=0x1 cx=0x0
        Function supported
        Call successful

EDID claims 1 more blocks left


*********** Something special has happened!
This happens a lot with TV's, and other devices
with extension blocks. If you have a TV, don't bother.
Odds are good that I2C will work for you. Try 'modprobe i2c-dev'.
Otherwise, please contact the author, Matthew Kern
E-mail: pyrophobicman@gmail.com
Please include full output from this program (especially that to stderr)



Reading next EDID block

VBE/DDC service about to be called
        Read EDID

        Performing real mode VBE call
        Interrupt 0x10 ax=0x4f15 bx=0x1 cx=0x0
        Function supported
        Call successful

EDID claims 1 more blocks left
EDID blocks left is wrong.
Your EDID is probably invalid.
Looks like VBE was successful. Have a good day.
Checksum Correct

Section "Monitor"
        Identifier "VALDAYVL236"
        ModelName "VALDAYVL236"
        VendorName "TXD"
        # Monitor Manufactured week 0 of 2048
        # EDID version 1.3
        # Digital Display
        # Display Physical Size not given. Normal for projectors.
        Gamma 2.20
        Option "DPMS" "true"
        Horizsync 30-81
        VertRefresh 56-76
        # Maximum pixel clock is 180MHz
        #Not giving standard mode: 1280x1024, 60Hz
        #Not giving standard mode: 1600x1200, 60Hz
        #Not giving standard mode: 1920x1200, 60Hz
        #Not giving standard mode: 1152x864, 75Hz

        #Extension block found. Parsing...
I only know about extension blocks of type 02h. PLEASE email me!
Something strange happened. Please contact the author,
Matthew Kern at <pyrophobicman@gmail.com>