I don't think the EDID is invalid:
sudo get-edid|parse-edid
parse-edid: parse-edid version 2.0.0
get-edid: get-edid version 2.0.0
Performing real mode VBE call
Interrupt 0x10 ax=0x4f00 bx=0x0 cx=0x0
Function supported
Call successful
VBE version 300
VBE string at 0xc8ffc "Intel(R) HSW Mobile/Desktop Graphics Chipset
Accelerated VGA BIOS"
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
parse-edid: EDID checksum passed.
# EDID version 1 revision 3
Section "Monitor"
# Block type: 2:0 3:0
# Block type: 2:0 3:fe
# Block type: 2:0 3:fe
Identifier "LGD:a503"
VendorName "LGD"
ModelName "LGD:a503"
# Block type: 2:0 3:0
# Block type: 2:0 3:fe
# Block type: 2:0 3:fe
# DPMS capabilities: Active off:no Suspend:no Standby:no
Mode "1920x1080" # vfreq 59.939Hz, hfreq 67.132kHz
DotClock 144.200000
HTimings 1920 1968 2040 2148
VTimings 1080 1083 1088 1120
Flags "-HSync" "-VSync"
EndMode
# Block type: 2:0 3:0
# Block type: 2:0 3:fe
# Block type: 2:0 3:fe
EndSection
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https://bugs.launchpad.net/bugs/1264665
Title:
[W65_67SZ, Intel Haswell HDMI, Digital Out, HDMI] Playback problem,
pavucontrol shows hdmi signal but no sound on tv
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https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1264665/+subscriptions
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