From owner-freebsd-stable Thu Nov 8 5:48:37 2001 Delivered-To: freebsd-stable@freebsd.org Received: from mailin7.bigpond.com (mailin7.bigpond.com [139.134.6.95]) by hub.freebsd.org (Postfix) with ESMTP id A1CE537B41C for ; Thu, 8 Nov 2001 05:48:33 -0800 (PST) Received: from brutus ([144.135.24.72]) by mailin7.bigpond.com (Netscape Messaging Server 4.15) with SMTP id GMHINS00.022; Thu, 8 Nov 2001 23:55:04 +1000 Received: from 144.137.128.82 ([144.137.128.82]) by bwmam02.mailsvc.email.bigpond.com(MailRouter V2.9k 8317/1326799); 08 Nov 2001 23:48:08 Message-ID: <003101c1685c$10ef6950$ca0010ac@brutus> From: "Gerard Eviston" To: "Pete French" Cc: References: Subject: Re: Curious crash Date: Thu, 8 Nov 2001 23:48:13 +1000 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG > > Aha, I've experienced it on a Matrox Millenium. > > I just heard from someone who has seen it under windows too - though it was > fixed by a driver update. I have been uusing these cards under OpenStep > for years thoygh, and have never come across this before. > Some well documented problems exist with some Matrox models, and I have personally seen problems which match the "SEEPROM leakage" description given by HP. http://forums.itrc.hp.com/cm/QuestionAnswer/1,11866,0x4a805220af9bd5118ff100 90279cd0f9,00.html Your vertical stripes problem seems quite different (see below) > > Was VESA support compiled into the kernel? I've written a screensaver > > module which crashes on the Matrox Millenium when I try and run in > > 800x600x8, I wonder if there's something odd with the Millenium > > VESA support? > VESA might be the right tree to be barking up according to http://www.seul.org/archives/independence-l/Aug-1999/msg00178.html which describes a problem with banked VGA write combining: "With a 2MB Millennium there were problems with BVWC -- most hires VESA modes would result in vertical stripes over the entire screen. This appears to be either a hardware or software bug on the part of Matrox. I found a workaround which eliminates the stripes but you don't get the full speed enhancement from the BVGA" > No, VESA support wasnt compiled in. It seems that these cards are very > sensetive to their device drivers - so maybe FreeBSD is doing something > valid-but-unusual which tickles a bug in it that doesnt get hit by other > operating systems ? > > Its frustrating that its so hard to reproduce too as it makes the chances of > fixng it very slim indeed. Sigh. > > -pcf. > Hope this helps, Gerard Eviston > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-stable" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message