From owner-freebsd-hackers Wed May 26 6:41:26 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from labinfo.iet.unipi.it (labinfo.iet.unipi.it [131.114.9.5]) by hub.freebsd.org (Postfix) with SMTP id B542F15607 for ; Wed, 26 May 1999 06:36:35 -0700 (PDT) (envelope-from luigi@labinfo.iet.unipi.it) Received: from localhost (luigi@localhost) by labinfo.iet.unipi.it (8.6.5/8.6.5) id MAA08211; Wed, 26 May 1999 12:38:50 +0200 From: Luigi Rizzo Message-Id: <199905261038.MAA08211@labinfo.iet.unipi.it> Subject: Re: PCI bus chanages from 2.2.x to 3.x/4.x and data corruption. To: roger@cs.strath.ac.uk (Roger Hardiman) Date: Wed, 26 May 1999 12:38:50 +0200 (MET DST) Cc: hackers@FreeBSD.ORG In-Reply-To: <374AC69E.8A0EA3B1@cs.strath.ac.uk> from "Roger Hardiman" at May 25, 99 04:49:31 pm X-Mailer: ELM [version 2.4 PL23] Content-Type: text Content-Length: 1709 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > Please read this. It affects our commercial users. > > I'm trying to find out if/how we initialise the PCI bus and any > memory controllers differently in 3.x compared to 2.2.x > > Since upgrading from 2.2.x to 3.x or 4.x, many many users have > noticed garbage on the video grabbed by the bt848 in their > Video Conferencing systems. (based on VIC). and not only that -- vic just makes things evident because the corruption causes a huge image update to be sent thus waiting a bit before sending the next frame. > This has been noticed by some commercial users of FreeBSD as well as > Academic users, and it looks bad on us. > > Luigi has 1 PC with 2 hard disks, a 2.2.x setup and a 3.x setup. > This allowed him to factor out all the variables except the > 2.2.x kernel and the 3.x kernel. (He used the same Bt848 driver) > > On 2.2.x VIC runs great. > On 3.x there is corruption to the video. and to be more precise, this is happening on at least 4 different PCs, of different vintages and speeds -- only thing in common is the use of 3.1R vs 2.2.anything. As a matter of fact i am right now reinstalling a 2.2.x on a machine just because i need to do an MBone broadcast and the video corruptions are not tolerable! cheers luigi -----------------------------------+------------------------------------- Luigi RIZZO, luigi@iet.unipi.it . Dip. di Ing. dell'Informazione http://www.iet.unipi.it/~luigi/ . Universita` di Pisa TEL/FAX: +39-050-568.533/522 . via Diotisalvi 2, 56126 PISA (Italy) http://www.iet.unipi.it/~luigi/ngc99/ ==== First International Workshop on Networked Group Communication ==== -----------------------------------+------------------------------------- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message