[ 137.375527] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 1
[ 137.375529] [drm:drm_edid_block_valid] *ERROR* Raw EDID:
[ 137.375532] <3>00 ff ff ff ff ff ff 00 1e 6d f0 75 01 01 01 01 .........m.u....
[ 137.375535] <3>02 13 02 03 80 46 27 78 ea d9 b0 a3 57 49 9c 25 .....F'x....WI.%
[ 137.375538] <3>11 49 4b a5 6e 00 31 40 45 40 61 40 81 80 d1 c0 .IK.n.1@E@a@....
[ 137.375540] <3>01 01 01 01 01 01 1b 21 50 a0 51 00 1e 30 48 88 .......!P.Q..0H.
[ 137.375543] <3>35 00 bc 86 21 00 00 1c 02 3a 80 18 71 38 2d 40 5...!....:..q8-@
[ 137.375545] <3>58 2c 45 00 c4 8e 21 00 00 1e 00 00 00 fc 00 33 X,E...!........3
[ 137.375548] <3>32 4c 47 32 30 30 30 20 20 20 20 20 00 00 00 fd 2LG2000 ....
[ 137.375551] <3>00 32 4b 1c 43 0f 00 0a 20 20 20 20 20 20 01 9a .2K.C... ..
[ 137.375552]
[ 137.375556] radeon 0000:02:00.0: HDMI Type A-1: EDID block 0 invalid.
[ 137.375560] [drm:radeon_dvi_detect] *ERROR* HDMI Type A-1: probed a monitor but no|invalid EDID

Xrand says HDMI-0 disconnected.
I guess it's because it cant't get an EDID.