linux-kernel - Re: [RFC] enhancing the kernel's graphics subsystem

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Date:	Wed, 23 May 2007 14:19:47 +0200
From:	Helge Hafting <helge.hafting@...el.hist.no>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
CC:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	dri-devel@...ts.sourceforge.net,
	Jesse Barnes <jesse.barnes@...el.com>,
	James Simmons <jsimmons@...tafluge.infradead.org>,
	Dave Airlie <airlied@...il.com>, linux-kernel@...r.kernel.org,
	"Antonino A. Daplas" <adaplas@...il.com>
Subject: Re: [RFC] enhancing the kernel's graphics subsystem

Benjamin Herrenschmidt wrote:
> On Tue, 2007-05-22 at 08:39 -0700, Jesse Barnes wrote:
>   
>> The current code does its best to figure out what modes are available and 
>> tries to pick a good one for each display.  It sounds like you're mainly 
>> concerned with the actual mode picking, not the mode and output detection 
>> and enumeration?  If so, that's a pretty easy change to make.  But if 
>> you're also worried about the kernel building mode lists, then we'll have 
>> bigger changes to make...
>>     
>
> I'm worried that the EDID we get from the monitor is bogus and needs to
> be overriden.
>   
How often do that happen?

There is the alternate solution of assuming that EDID is correct,
and provide an override when it isn't. So anyone with a good monitor
get a nice display by default.  Those with a defective lying monitor
may have to add a "resolution=640x480" parameter to their
kernel command line to get out of the black screen modus.
This shifts the bother to those with a bad monitor, who then are
free to get pissed off at their monitor vendor . . .

Helge Hafting
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