From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 76564] [AMD Fusion E-350] HDMI refresh rates doesn't match expectations Date: Thu, 27 Mar 2014 18:53:17 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1100564488==" Return-path: Received: from culpepper.freedesktop.org (unknown [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id 3193F6EA74 for ; Thu, 27 Mar 2014 11:53:17 -0700 (PDT) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org --===============1100564488== Content-Type: multipart/alternative; boundary="1395946397.5C72FCD0.18032"; charset="us-ascii" --1395946397.5C72FCD0.18032 Date: Thu, 27 Mar 2014 18:53:17 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" https://bugs.freedesktop.org/show_bug.cgi?id=76564 --- Comment #20 from jeroen --- (In reply to comment #19) > (In reply to comment #16) > > (In reply to comment #15) > > > I got the results with fglrx: > > > PPLL1@50Hz: fb=23.7 ref=2 post=6 > > > PPLL1@23.976Hz: fb=23.7 ref=2 post=12 > > > > > > PPLL2 does seem to be used as it does not change. PPLL1 has different values > > > than with the radeon OSS driver. What does this mean? > > > > > > (100Mhz * 23.7) / (2 * 6) = 197.5Mhz > > > > (100Mhz * 23.7) / (2 * 12) = 98.75Mhz > > > > Maybe fglrx is using different modelines with a different display clock? > > Can you print what modes are being used with fglrx and radeon? E.g., xrandr > > --verbose. > > I attached both xrandr outputs. > > I also noticed that for fgrlx the PLL values are the same for 50Hz,60Hz and > 59.94Hz output. When I look at the xrandr output I wonder if the reference frequency is not 75MHz for fgrlx? Can the reference even change is this not fixed by the hardware? -- You are receiving this mail because: You are the assignee for the bug. --1395946397.5C72FCD0.18032 Date: Thu, 27 Mar 2014 18:53:17 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8"

Comment # 20 on bug 76564 from 
(In reply to comment #19)
> (In reply to comment #16)
> > (In reply to comment #15)
> > > I got the results with fglrx:
> > > PPLL1@50Hz:     fb=23.7    ref=2    post=6
> > > PPLL1@23.976Hz: fb=23.7    ref=2    post=12
> > > 
> > > PPLL2 does seem to be used as it does not change. PPLL1 has different values
> > > than with the radeon OSS driver. What does this mean?
> > 
> > 
> > (100Mhz * 23.7) / (2 * 6) = 197.5Mhz
> > 
> > (100Mhz * 23.7) / (2 * 12) = 98.75Mhz
> > 
> > Maybe fglrx is using different modelines with a different display clock? 
> > Can you print what modes are being used with fglrx and radeon?  E.g., xrandr
> > --verbose.
> 
> I attached both xrandr outputs.
> 
> I also noticed that for fgrlx the PLL values are the same for 50Hz,60Hz and
> 59.94Hz output.

When I look at the xrandr output I wonder if the reference frequency is not
75MHz for fgrlx? Can the reference even change is this not fixed by the
hardware?

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  • You are the assignee for the bug.
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