linux-kernel - Re: 2.6.29-rc3-git6: Reported regressions from 2.6.28

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Date:	Wed, 4 Feb 2009 19:11:09 +0100
From:	Norbert Preining <preining@...ic.at>
To:	Linus Torvalds <torvalds@...ux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Jens Axboe <jens.axboe@...cle.com>,
	Hiroshi Shimamoto <h-shimamoto@...jp.nec.com>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: 2.6.29-rc3-git6: Reported regressions from 2.6.28

On Mi, 04 Feb 2009, Linus Torvalds wrote:
> > Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=12599
> > Subject		: dri /dev node disappeared with 2.6.29-rc1
> > Submitter	: Norbert Preining <preining@...ic.at>
> > Date		: 2009-01-15 13:42 (21 days old)
> > References	: http://marc.info/?l=linux-kernel&m=123202701026647&w=4
> 
> I think this one is simply that Intel DRI now requires CONFIG_FB.

Right. I mentioned that in another bug report:
http://bugzilla.kernel.org/show_bug.cgi?id=12494

> So make sure that you say yes to the CONFIG_FB question (easiest fix: just 
> edit the .config file and change the line "# CONFIG_FB is not set" to 
> "CONFIG_FB=y" and do "make oldconfig" - I realize that people think that 
> graphical config front-ends are simpler, but often just editing the file 
> is the quickest way).

The problem is that if you have a configuration under 2.6.28 without
CONFIG_FB and just call make oldconfig, or even make config and don't
know that you loose the DRM. And I was using make oldconfig (there is a
graphical config?? ;-))

There is that other bug 12494 mentioned, namely due to the disappearance
of DRM the brightness adjustment on my vaio z11 stopped working.

So maybe there should be a select FB or so under the CONFIG_DRM option
(not that I actually can program Kconfig).

Best wishes

Norbert

-------------------------------------------------------------------------------
Dr. Norbert Preining <preining@...ic.at>        Vienna University of Technology
Debian Developer <preining@...ian.org>                         Debian TeX Group
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