[Bug 63860] [pnv] Phantom LVDS

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=63860

--- Comment #10 from Andrey <annndddrr at gmail.com> ---
I guess I do not agree with this resolution. It is not because I have to work
around this by extra kernel option (I did this for my system and it works). It
is because the logic looks incorrect. It is irrelevant to this specific
motherboard and its bios.

How will your driver work for a buggy free bios and motherboard that support
internal LVDS panel and external VGA(or HDMI or DP) panel, when only external
monitor was attached? Output the reproduction of famous Kazimir Malevich's
Black Square?

BIOS at his end have no chance to detect EDID-less panel too, but on the other
hand it should be reliably enough to output BIOS menu for any display
configuration. To achieve that, VBIOS orom configures in clone mode to make
sure, if any display connected the bios menu will be displayed. This is not a
bug. It doesn’t cause problem at bios level and work well in any display
configuration. 

In your attempt to rely on BIOS configuration, you have to consider that the
one is good for BIOS may not be good for OS driver in all cases.

If  you leave this issue unfixed, it would affect many dual panel motherboard
with LVDS

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