grrrrr

[18194.046134] [drm:radeon_vga_detect] *ERROR* VGA-1: probed a monitor but no|invalid EDID
[18194.130126] i2c i2c-1: sendbytes: NAK bailout.
[18195.393445] i2c i2c-1: sendbytes: NAK bailout.
[18198.884297] i2c i2c-1: sendbytes: NAK bailout.
[18199.583421] i2c i2c-1: readbytes: ack/nak timeout
[18199.756873] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 136
[18199.756881] Raw EDID:
[18199.756888] <3>07 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff  ................
[18199.756895] <3>ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff  ................
[18199.756902] <3>ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff  ................
[18199.756908] <3>ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff  ................
[18199.756913] <3>ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff  ................
[18199.756919] <3>ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff  ................
[18199.756925] <3>ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff  ................
[18199.756930] <3>ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff  ................
[18199.756935]
[18201.112887] stereo mode not supported
[18201.112897] stereo mode not supported
[18201.112900] composite sync not supported
[18201.112911] stereo mode not supported