From owner-freebsd-hackers  Thu Feb 20 19:22:18 1997
Return-Path: <owner-hackers>
Received: (from root@localhost)
          by freefall.freebsd.org (8.8.5/8.8.5) id TAA02615
          for hackers-outgoing; Thu, 20 Feb 1997 19:22:18 -0800 (PST)
Received: from who.cdrom.com (who.cdrom.com [204.216.27.3])
          by freefall.freebsd.org (8.8.5/8.8.5) with ESMTP id TAA02598
          for <freebsd-hackers@freebsd.org>; Thu, 20 Feb 1997 19:22:15 -0800 (PST)
Received: from relay-7.mail.demon.net (relay-7.mail.demon.net [194.217.242.9])
          by who.cdrom.com (8.7.5/8.6.11) with SMTP id TAA26468
          for <freebsd-hackers@freebsd.org>; Thu, 20 Feb 1997 19:22:11 -0800 (PST)
Received: from awfulhak.demon.co.uk ([158.152.17.1]) by relay-6.mail.demon.net
           id aa625761; 21 Feb 97 3:02 GMT
Received: from awfulhak.demon.co.uk (localhost.coverform.lan [127.0.0.1]) by awfulhak.demon.co.uk (8.8.5/8.7.3) with ESMTP id BAA04375; Fri, 21 Feb 1997 01:35:53 GMT
Message-Id: <199702210135.BAA04375@awfulhak.demon.co.uk>
X-Mailer: exmh version 1.6.9 8/22/96
To: Philippe Regnauld <regnauld@deepo.prosa.dk>
cc: freebsd-hackers@freebsd.org
Subject: Re: Screen flickering 
In-reply-to: Your message of "Thu, 20 Feb 1997 10:49:51 +0100."
             <Mutt.19970220104951.regnauld@deepo.prosa.dk> 
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Date: Fri, 21 Feb 1997 01:35:53 +0000
From: Brian Somers <brian@awfulhak.demon.co.uk>
Sender: owner-hackers@freebsd.org
X-Loop: FreeBSD.org
Precedence: bulk

> Brian Somers (brian) ecrit/writes:
> > 
> > Essentially, the syscons screen "flickers" probably every couple of
> > seconds on average, and only with "vidcontrol -c destructive".  From
> > what I can figure, the "while (!(inb(crtc_addr+6)&8)) ;" bit in
> > syscons.c doesn't work as expected (although removing it makes
> > things a *lot* worse)....
> 
> 	Got the same thing, except it's when I move the mouse on 
> 	the console. Config is:
> 
> 	2.2-Beta
> 	Acer 950C P75 / 24 Mb, 800x600 DSTN -- Chips & Tech 65545
> 
> 	The screen flickers when I move the mouse in console mode
> 	(Moused).
> 
> 	Just for the record, this machine's PCCARD  only started working when
> 	I applied the patches for  PS/2 Keyboard !!
> 
> 	And then, moused won't work with the PS/2 mouse - only with
> 	serial mice.

Interesting, the laptop I'm talking about is an Acer 950 P120 / 40 Mb & TFT.
The graphics chipset is the same, and everything works..... (built-in mouse
too).

I'm not surprised about the flickering.... the same retrace code is used for
the mouse stuff.  Try "vidcontrol -c destructive" for some more flicker ;)
-- 
Brian <brian@awfulhak.demon.co.uk>, <brian@freebsd.org>
      <http://www.awfulhak.demon.co.uk/>
Don't _EVER_ lose your sense of humour....