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From: Mikael Karpberg <karpen@ocean.campus.luth.se>
Message-Id: <199809172305.BAA08041@ocean.campus.luth.se>
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: <xzp7lz2v15n.fsf@hrotti.ifi.uio.no> from =?ISO-8859-1?Q?Dag=2DErling_Co=EFdan__Sm=F8rgrav?= at "Sep 18, 98 00:12:52 am"
To: dag-erli@ifi.uio.no (Dag-Erling =?iso-8859-1?Q?Co=EFdan?= =?iso-8859-1?Q?Sm=F8rgrav?=)
Date: Fri, 18 Sep 1998 01:05:31 +0200 (CEST)
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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