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 17:53:04 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1528087955==" Return-path: Received: from culpepper.freedesktop.org (unknown [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id 332886EA53 for ; Thu, 27 Mar 2014 10:53:04 -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 --===============1528087955== Content-Type: multipart/alternative; boundary="1395942784.7aCc72F1.32553"; charset="us-ascii" --1395942784.7aCc72F1.32553 Date: Thu, 27 Mar 2014 17:53:04 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" https://bugs.freedesktop.org/show_bug.cgi?id=76564 --- Comment #16 from Alex Deucher --- (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. -- You are receiving this mail because: You are the assignee for the bug. --1395942784.7aCc72F1.32553 Date: Thu, 27 Mar 2014 17:53:04 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8"

Comment # 16 on bug 76564 from 
(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.

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  • You are the assignee for the bug.
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