I have a similar issue with the nouveau drivers. I have an XPS M1710 and the built-in display is detected properly, but the secondary monitor is not. (The Nvidia binary driver detects it properly). dmesg output is similar, but the invalid edid is even more suspicious looking:
[drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 130 [drm:drm_edid_block_valid] *ERROR* Raw EDID: <3>01 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ <3>ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ <3>ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ <3>ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ <3>ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ <3>ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ <3>ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ <3>ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/588661 Title: Black screen on boot ("EDID checksum is invalid") -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
