From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 93753] Sometimes wrong clk frequency of Display after dpms mode changes. Date: Mon, 18 Jan 2016 10:29:56 +0000 Message-ID: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1573893759==" Return-path: Received: from culpepper.freedesktop.org (unknown [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id 2F22B6E4E6 for ; Mon, 18 Jan 2016 02:29:56 -0800 (PST) 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 --===============1573893759== Content-Type: multipart/alternative; boundary="14531129960.3053fFD.1593"; charset="UTF-8" --14531129960.3053fFD.1593 Date: Mon, 18 Jan 2016 10:29:56 +0000 MIME-Version: 1.0 Content-Type: text/plain https://bugs.freedesktop.org/show_bug.cgi?id=93753 Bug ID: 93753 Summary: Sometimes wrong clk frequency of Display after dpms mode changes. Product: DRI Version: unspecified Hardware: x86-64 (AMD64) OS: Linux (All) Status: NEW Severity: major Priority: medium Component: DRM/Radeon Assignee: dri-devel@lists.freedesktop.org Reporter: t.graziadei@bachmann.info Created attachment 121103 --> https://bugs.freedesktop.org/attachment.cgi?id=121103&action=edit Screenshot of failure Sometimes after the deactivation of the screensaver or also on bootup the screen shows flickering noise and a duplicated screen image. (Attached there is the used test image and a screenshot of the failure image). We tested on various kernel versions, latest kernel tested was 4.4.0. We run a customized debian image. Further investigations showed, that in the failure scenario the measured clk frequency was only 25MHz but it should be 35MHz. We also tried to deactivate dpms completly (radeon.dpm=0 in kernel parameters) and also turned the dpms off in the screensaver, but we still sometimes encounter the problem after a reboot. Attached you will find a dmesg output with drm.debug=0xf activated. We use a Radeon PALM on a AMD G-T40E 2x1GHz -- You are receiving this mail because: You are the assignee for the bug. --14531129960.3053fFD.1593 Date: Mon, 18 Jan 2016 10:29:56 +0000 MIME-Version: 1.0 Content-Type: text/html
Bug ID 93753
Summary Sometimes wrong clk frequency of Display after dpms mode changes.
Product DRI
Version unspecified
Hardware x86-64 (AMD64)
OS Linux (All)
Status NEW
Severity major
Priority medium
Component DRM/Radeon
Assignee dri-devel@lists.freedesktop.org
Reporter t.graziadei@bachmann.info 

Created attachment 121103 [details]
Screenshot of failure

Sometimes after the deactivation of the screensaver or also on bootup the
screen shows flickering noise and a duplicated screen image. (Attached there is
the used test image and a screenshot of the failure image). 

We tested on various kernel versions, latest kernel tested was 4.4.0. We run a
customized debian image. 

Further investigations showed, that in the failure scenario the measured clk
frequency was only 25MHz but it should be 35MHz. 

We also tried to deactivate dpms completly (radeon.dpm=0 in kernel parameters)
and also turned the dpms off in the screensaver, but we still sometimes
encounter the problem after a reboot. 

Attached you will find a dmesg output with drm.debug=0xf activated. 

We use a Radeon PALM on a AMD G-T40E 2x1GHz

You are receiving this mail because:
  • You are the assignee for the bug.
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