From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?B?TWFyaXVzIEdyw7ZnZXI=?= Subject: Glitch in newer drm-next/drm-radeon-testing Date: Wed, 02 Jun 2010 08:07:26 +0200 Message-ID: <4C05F51E.8040603@googlemail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-fx0-f49.google.com (mail-fx0-f49.google.com [209.85.161.49]) by gabe.freedesktop.org (Postfix) with ESMTP id C58D89E74C for ; Tue, 1 Jun 2010 23:07:29 -0700 (PDT) Received: by fxm15 with SMTP id 15so4390606fxm.36 for ; Tue, 01 Jun 2010 23:07:28 -0700 (PDT) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org Errors-To: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org To: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org Hello All, I'm trying the top-of-trunk drm-2.6 trees (both drm-next and drm-radeon-testing) with my Radeon HD 3200 GPU over HDMI. The primary application is mythtv which uses DRM syncing for the frame syncronisation. Now, with the exact same userland software I noticed the introduction of sync gliches in the May-timeframe. The drm-radeon-testing on May 9 was still ok, but both drm-next and drm-radeon-testing at the end of May showed that glitch: every couple of seconds there's a very visual hickup, especially in scroll texts. Apologies for such an unspecific description, and for what almost seems like a support request for MythTV. I wouldn't post here if I were not 100% sure it must be related with the recent drm changes. What I've tried so far: * I tried bisecting, but I failed to spot the offending commits somehow. My last hope is this list of experts - for me the git logs look sane, but you guy surely have more insight. * I tried turning on drm debug=1, but did not see anything suspicious, especially with relation to the r600 irq handling changes. * Currently I'm in the process of setting up systemtap to profile the scheduling, but I'm still on the learning curve :) I'd be most grateful for any tips and things to try to isolate this issue. Thanks Marius