From owner-freebsd-current Mon Aug 3 07:25:23 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id HAA01278 for freebsd-current-outgoing; Mon, 3 Aug 1998 07:25:23 -0700 (PDT) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from david.siemens.de (david.siemens.de [192.35.17.14]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id HAA01259 for ; Mon, 3 Aug 1998 07:25:20 -0700 (PDT) (envelope-from andre.albsmeier@mchp.siemens.de) X-Envelope-Sender-Is: andre.albsmeier@mchp.siemens.de (at relayer david.siemens.de) Received: from mail.siemens.de (salomon.siemens.de [139.23.33.13]) by david.siemens.de (8.9.1/8.9.1) with ESMTP id QAA06124 for ; Mon, 3 Aug 1998 16:24:59 +0200 (MET DST) Received: from curry.mchp.siemens.de (daemon@curry.mchp.siemens.de [146.180.31.23]) by mail.siemens.de (8.9.1/8.9.1) with ESMTP id QAA01245 for ; Mon, 3 Aug 1998 16:24:59 +0200 (MET DST) Received: (from daemon@localhost) by curry.mchp.siemens.de (8.8.8/8.8.8) id QAA16531 for ; Mon, 3 Aug 1998 16:25:00 +0200 (CEST) Received: from server.us.tld(192.168.16.33) via SMTP by curry.mchp.siemens.de, id smtpdw16527; Mon Aug 3 16:24:57 1998 Received: (from daemon@localhost) by server.us.tld (8.8.8/8.8.8) id QAA21732 for ; Mon, 3 Aug 1998 16:24:57 +0200 (CEST) (envelope-from andre@bali.us.tld) Received: from bali.us.tld(192.168.21.100) via SMTP by server.us.tld, id smtpdf21624; Mon Aug 3 16:24:54 1998 Received: (from andre@localhost) by bali.us.tld (8.8.8/8.8.8) id QAA14695; Mon, 3 Aug 1998 16:24:54 +0200 (CEST) (envelope-from andre) From: Andre Albsmeier Message-Id: <199808031424.QAA14695@bali.us.tld> Subject: Re: screen flicker in 3.0-CURRENT In-Reply-To: <199808031332.WAA19278@zodiac.mech.utsunomiya-u.ac.jp> from Kazutaka YOKOTA at "Aug 3, 98 10:32:19 pm" To: yokota@zodiac.mech.utsunomiya-u.ac.jp (Kazutaka YOKOTA) Date: Mon, 3 Aug 1998 16:24:54 +0200 (CEST) Cc: freebsd-current@FreeBSD.ORG, yokota@zodiac.mech.utsunomiya-u.ac.jp X-Mailer: ELM [version 2.4ME+ PL40 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > I would be grateful if anybody who are having the following problem > would apply the attached patch to /sys/i386/isa/syscons.c and report > the result to me. > > There have been reports that the screen flicker is so bad when the > mouse pointer is moved in 3.0-CURRENT and 2.2.7. 2.2.6 saw less of > the problem. It has been observed that the problem is most apparent: > > a) in notebook computers, > b) and/or in the systems with a C&T video chip. > > A possible workaround is to eliminate some I/O access to the chip. > But, as I am not sure if this is OK with other VGA chip sets, we shall > use a new configuration option SC_BAD_FLICKER. Define this option in > the kernel configuration file to remove outb()/outw() calls in question. Hmm, I had this problem quite a while on a -STABLE system since 2.2.5 However, it went away after attaching a different monitor to it. The first monitor is definately OK, I have 4 of them and they all behaved equal. The video chip is a et4000 on a low cost ISA card. The symptoms were that when the mouse was used (moused and mousepointer enabled) the screen turned blank and reappeared after moving the mouse more. -Andre To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message