using the read-edid package I can get the following (needed to load the
'eeprom' module first):
Although it reports an invalid checksum this all seems like sensible
information.
decode-edid: using bus 3 (autodetected)
decode-edid: decode-edid version 1.1
parse-edid: parse-edid version 2.0.0
parse-edid: EDID checksum failed - data is corrupt. Continuing anyway.
# EDID version 1 revision 3
Section "Monitor"
# Block type: 2:0 3:fd
# Block type: 2:0 3:fc
Identifier "SMS22A350H"
VendorName "SAM"
ModelName "SMS22A350H"
# Block type: 2:0 3:fd
HorizSync 31-81
VertRefresh 50-75
# Max dot clock (video bandwidth) 170 MHz
# Block type: 2:0 3:fc
# DPMS capabilities: Active off:yes Suspend:no Standby:no
Mode "1920x1080" # vfreq 60.000Hz, hfreq 67.500kHz
DotClock 148.500000
HTimings 1920 2040 2100 2200
VTimings 1080 1143 1206 1125
Flags "Interlace" "+HSync" "+VSync"
EndMode
Mode "1280x720" # vfreq 60.000Hz, hfreq 45.000kHz
DotClock 74.250000
HTimings 1280 1390 1430 1650
VTimings 720 725 730 750
Flags "+HSync" "+VSync"
EndMode
# Block type: 2:0 3:fd
# Block type: 2:0 3:fc
EndSection
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https://bugs.launchpad.net/bugs/1033695
Title:
External HDMI Monitor does not get detected / invalid EDID checksum
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