ubuntu-x-swat team mailing list archive

[Andre LeBlanc <andrepleblanc@xxxxxxxxx>]

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  ................

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https://bugs.launchpad.net/bugs/588661

Title:
  Black screen on boot ("EDID checksum is invalid")