linux-kernel - Re: Radeon jittery post 2.6.35

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Date:	Fri, 18 Mar 2011 09:55:52 +0100
From:	Anders Eriksson <aeriksson@...tmail.fm>
To:	Alex Deucher <alexdeucher@...il.com>
CC:	airlied@...hat.com, dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org, xorg-driver-ati@...ts.x.org
Subject: Re: Radeon jittery post 2.6.35

 On 03/16/11 21:09, Anders Eriksson wrote:
>  On 03/15/11 22:46, Alex Deucher wrote:
> >  Try booting with radeon.audio=0 on 2.6.38rc, some TVs have problems
> > with the hdmi packets we send by default.  disabling audio will treat
> > the hdmi like dvi.
> >
> > Alex
> You seem to be on to something there. radeon.audio=0 removes
> what appears to be all of the jitter. I say "appear", because during
> my many test runs today, I've come across moments where my brain
> goes "wasn't what I just noticed on the TV something abnormal?" Both
> in fb mode (post KMS), and in X11. It's definetly improved from useless
> for family use, to perfectly ok though.
>
I was too early on this one. Yesterday (.38) , and today (38-rc8),
are both jittery in post-KMS fb mode and in X, even though I use
radeon.audio=0.

A power cycling of the TV stabilizes it though.

I'd be more than happy to test out any patches or ideas you might have.

-A
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