[Bug 31339] HP/Compaq 8510w HDMI port only works when booted with monitor attached

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Nov 3 21:33:35 PDT 2010


--- Comment #12 from Alex Deucher <agd5f at yahoo.com> 2010-11-03 21:33:35 PDT ---
(In reply to comment #10)

> I gave your patch a try.  It didn't work as it, but I'm pretty sure that is
> because of an index typo in the atom bios router object walking code.  I'm
> attaching a patch to fix this.

Good catch.

> [   25.805988] [drm] Connector 3:
> [   25.805989] [drm]   LVDS
> [   25.805991] [drm]   DDC: 0xac0 0xac0 0xac4 0xac4 0xac8 0xac8 0xacc 0xacc
> [   25.805993] [drm]   DDC Router 0x6/0x4
> [   25.805994] [drm]   Clock/Data Router 0x1/0x1

I think I see the problem.  The LVDS port is getting a router assigned to it
when it doesn't have a router object in the object table.  Not quite sure how
that's happening, but I suspect it's messing up the line toggling. 
Unfortunately, I won't have access to my dev box until next week.

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