linux-kernel - Re: Linux 2.6.37-rc8 (no fb)

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Message-Id: <849307$av3koe@azsmga001.ch.intel.com>
Date:	Thu, 30 Dec 2010 18:36:45 +0000
From:	Chris Wilson <chris@...is-wilson.co.uk>
To:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Randy Dunlap <randy.dunlap@...cle.com>
Cc:	dri-devel@...ts.freedesktop.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	David Airlie <airlied@...ux.ie>
Subject: Re: Linux 2.6.37-rc8 (no fb)

On Wed, 29 Dec 2010 11:40:04 -0800, Linus Torvalds <torvalds@...ux-foundation.org> wrote:
> On Wed, Dec 29, 2010 at 10:21 AM, Randy Dunlap <randy.dunlap@...cle.com> wrote:
> >
> > The only significant difference that I can see in the kernel message log
> > is this:
> 
> Hmm. I suspect that difference should have gone away with commit
> 92971021c6328 (Revert "drm: Don't try and disable an encoder that was
> never enabled"), but clearly that didn't fix your blank screen.
> 
> Does reverting commit 448f53a1ede54eb854d036abf54573281412d650
> ("drm/i915/bios: Reverse order of 100/120 Mhz SSC clocks") fix it for
> you? It does for some people..
> 
> Chris - why did that lvds_ssc_freq thing suddenly start mattering? Can
> we please just disable spread-spectrum entirely? Or perhaps only if we
> notice that it was enabled already? Or something?

It appeared to be the easiest fix for the machines I had to hand and was
confirmed by several people with identical machines. However, it
definitely caused a regression for working panels and therefore it will
be reverted. 
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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