From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Paul A. Clarke" Subject: Re: matroxfb-fix-dvi-setup-to-be-more-compatible.patch introduces jitter Date: Thu, 10 Aug 2006 11:55:07 -0500 Message-ID: <44DB64EB.3020007@us.ibm.com> References: <689964845@web.de> Reply-To: linux-fbdev-devel@lists.sourceforge.net Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.91] helo=mail.sourceforge.net) by sc8-sf-list1-new.sourceforge.net with esmtp (Exim 4.43) id 1GBDoa-0006L5-1m for linux-fbdev-devel@lists.sourceforge.net; Thu, 10 Aug 2006 09:55:24 -0700 Received: from e5.ny.us.ibm.com ([32.97.182.145]) by mail.sourceforge.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.44) id 1GBDoX-0007MJ-5a for linux-fbdev-devel@lists.sourceforge.net; Thu, 10 Aug 2006 09:55:24 -0700 Received: from d01relay02.pok.ibm.com (d01relay02.pok.ibm.com [9.56.227.234]) by e5.ny.us.ibm.com (8.12.11.20060308/8.12.11) with ESMTP id k7AGtBZ8024033 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=FAIL) for ; Thu, 10 Aug 2006 12:55:11 -0400 Received: from d01av02.pok.ibm.com (d01av02.pok.ibm.com [9.56.224.216]) by d01relay02.pok.ibm.com (8.13.6/NCO/VER7.0) with ESMTP id k7AGt948245440 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Thu, 10 Aug 2006 12:55:09 -0400 Received: from d01av02.pok.ibm.com (loopback [127.0.0.1]) by d01av02.pok.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id k7AGt87s015815 for ; Thu, 10 Aug 2006 12:55:09 -0400 In-Reply-To: <689964845@web.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-fbdev-devel-bounces@lists.sourceforge.net Errors-To: linux-fbdev-devel-bounces@lists.sourceforge.net To: linux-fbdev-devel@lists.sourceforge.net Cc: vandrove@vc.cvut.cz I've been looking deeper into this problem, which was reportedly introduced by my patch a while ago, in Linux kernel 2.6.17. I don't doubt the reports, but I'd like to replicate the problem as seen on the x86 boxes as reported in kernel bug 6720 and a few others directly to me, so I can verify a fix (if/when I can create one). So, I installed SLES 10 on an old x86 box, with a PCI G450 (actually an IBM GXT135P). I verified that my patch is _not_ included in that kernel (2.6.16.21). However, I see jittery DVI-D output at all times. I've tried 640x480@60Hz, 1280x1024@60Hz, different "vesa" mode parameters (0x11b, 0x1bb), XServer "-fbbpp 32". I usually end up losing sync with the monitor after a few minutes. I don't have much experience with the G450 on x86, but I'm quite surprised. Has anyone else observed this? -- Regards, Paul Clarke ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642