linux-kernel - Re: Linux 2.6.31-rc7

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Message-ID: <20090826101825.455d280e@jbarnes-g45>
Date:	Wed, 26 Aug 2009 10:18:25 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Dave Airlie <airlied@...il.com>,
	Zhenyu Wang <zhenyuw@...ux.intel.com>,
	Eric Anholt <eric@...olt.net>, mailing54 <mailing54@...k.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Dave Airlie <airlied@...hat.com>,
	dri-devel@...ts.sourceforge.net, Ma Ling <ling.ma@...el.com>,
	"Zhao, Yakui" <yakui.zhao@...el.com>
Subject: Re: Linux 2.6.31-rc7

On Wed, 26 Aug 2009 10:12:14 -0700 (PDT)
Linus Torvalds <torvalds@...ux-foundation.org> wrote:
> In all three cases the end result is "no EDID", but regardless of
> that, the correct action is basically _never_ to say "ok, I'll just
> assume that the display is on connector XYZ regardless of what the
> state of the graphics chip is".

Yeah, that's normal.  Most builtin panels don't have EDIDs.  Failures
on attached monitors are potentially more serious.

> > so yes I think do better at failing is what is needed, its still
> > failing but its more user friendly fail.
> 
> Yes. If something fails ("oops, I can't seem EDID for any
> connector"), I wish KMS would fail way better than just default to
> some crazy setup. The failure mode should be to at least drive
> whatever the BIOS enabled.

Right, we need to improve our detection heuristics.  We've recently
added some to catch non-existent LVDS displays, but currently don't
have any for VGA.  Using the current configuration as a guide is a
reasonable addition...

-- 
Jesse Barnes, Intel Open Source Technology Center
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