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 -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1033695 Title: External HDMI Monitor does not get detected / invalid EDID checksum To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1033695/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp