Comment # 10 on bug 72051 from Eugene Shalygin

Indeed, this option is set. Commit that was pointed out by you fixes the
problem. 

However, now when booting when the problematic screen is attached, I see a
message that EDID is invalid:

[    8.922653] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid,
remainder is 255
[    8.922666] Raw EDID:
[    8.922670]          ff ff ff ff ff ff ff 00 22 64 e5 20 fb 01 00 00
[    8.922676]          17 14 01 03 80 3b 25 78 ea af f6 a6 54 4c 9e 23
[    8.922680]          10 4f 54 bf ef 80 d1 00 b3 00 a9 40 95 00 90 40
[    8.922684]          81 80 81 40 71 4f 28 3c 80 a0 70 b0 23 40 30 20
[    8.922688]          36 00 51 73 21 00 00 1a 00 00 00 ff 00 30 32 33
[    8.922692]          4c 4b 33 51 41 30 30 35 30 37 00 00 00 fd 00 38
[    8.922696]          4b 18 50 0f 00 0a 20 20 20 20 20 20 00 00 00 fc
[    8.922700]          00 48 48 32 38 31 0a 20 20 20 20 20 20 20 01 e2

repeated 4 times. This is probably is separate problem?