https://bugs.freedesktop.org/show_bug.cgi?id=73530
--- Comment #88 from Alex Deucher alexdeucher@gmail.com --- Created attachment 115774 --> https://bugs.freedesktop.org/attachment.cgi?id=115774&action=edit add some debugging output
Can you attach your dmesg output with this patch attached? It should help narrow down where the dpcd info is getting corrupted.