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To: Mikael Karpberg <karpen@ocean.campus.luth.se>
cc: dag-erli@ifi.uio.no (Dag-Erling =?iso-8859-1?Q?Co=EFdan?=
    =?iso-8859-1?Q?Sm=F8rgrav?=),
        cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG
Subject: Re: cvs commit: src/sys/isa scvidctl.c videoio.c videoio.h syscons.c syscons.h src/sys/alpha/conf files.alpha src/sys/al 
In-reply-to: Your message of "Fri, 18 Sep 1998 01:05:31 +0200."
             <199809172305.BAA08041@ocean.campus.luth.se> 
Date: Thu, 17 Sep 1998 19:35:22 -0700
Message-ID: <764.906086122@time.cdrom.com>
From: "Jordan K. Hubbard" <jkh@time.cdrom.com>
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Absolutely.  Does someone else want to do the honors, or shall I?

> According to Dag-Erling Coïdan  Smørgrav:
> > Mikael Karpberg <karpen@ocean.campus.luth.se> writes:
> > > According to Dag-Erling Coïdan  Smørgrav:
> > > > I agree that "flicker countermeasures" should be the default, but
> > > > please leave in a knob for turning them off when they're not needed.
> > > Exactly WHAT is it that makes the option needed at all? I mean the code
> > > works just fine with no-flicker... Why would you want the extra code
> > > that is turned off then you run in no-flicker? What does it do, since
> > > it's not needed?
> > 
> > I think you misunderstand. The issue is: certain video chipsets react
> > badly to font changes outside the vertical retrace period. Using
> > moused(8) on these chipsets is unbearable without the no-flicker code.
> > The problem is that the no-flicker code slows things down a tad. Not
> > much, but enough that you notice it if there's a lot of mouse
> > activity. So those of us who don't have that problem may want to turn
> > it off, unless we're always running X since it only affects text mode.
> 
> Oh, ok. So it's a small speedup for others? Well, by all means, let's make
> it an option that can be turned on, then.
> 
>   /Mikael