Re: Linux 2.6.31-rc7

From: Linus Torvalds
Date: Tue Aug 25 2009 - 23:34:18 EST

On Wed, 26 Aug 2009, Zhenyu Wang wrote:
> > In my experience, the BIOS setup doesn't reflect what outputs should be
> > used at runtime, and certainly not the correct configuration of the
> > enabled outputs. For example, if we went to this, the giant monitor
> > attached to my laptop that I actually look at would go unused.
> yeah, normally VBIOS startup just needs or only can driver one pipe, so
> we don't have any pre knowledge except detect everything.

Umm. What's your guys point, exactly?


If you actually detected things _right_, none of this would be an issue.
But you don't. And you seem to have a really hard time even admitting
that. You try to re-detect things, and you SCREW UP.

> we already have some mac relate bugs open, but please report on it so we
> do have people with hardware to try and response. We have recently got a
> MacBook, yakui is looking after the modesetting issue on it.

Quite frankly, I've reported these things several times. I've been open to
try patches. Nothing has ever come out of it.

I have a Mac Mini that I reported as broken over a month ago. I have a
Westemere I've reported as not doing any DDC probing - and that I have to
disable the LVDS probing on entirely in order to not make KMS set up the
display to go to a non-existent LVDS port.

You claim that you "detect everything", but quite frankly, you don't. The
KMS code seems to assume that if it's a mobile chipset, it should have an
LVDS output - and whether anything is connected to that or not is totally
immaterial. There's clearly _zero_ "detection" going on.

And the thing is, X seems to get it right, at least more often than KMS

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