Date: Tue, 24 Feb 1998 11:22:11 +0100 (MET) From: Søren Schmidt <sos@FreeBSD.ORG> To: abial@nask.pl (Andrzej Bialecki) Cc: yokota@zodiac.mech.utsunomiya-u.ac.jp, freebsd-current@FreeBSD.ORG Subject: Re: Proposed addition to panic() behaviour Message-ID: <199802241022.LAA01674@sos.freebsd.dk> In-Reply-To: <Pine.NEB.3.95.980224111015.22979A-100000@korin.warman.org.pl> from Andrzej Bialecki at "Feb 24, 98 11:13:16 am"
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In reply to Andrzej Bialecki who wrote:
> > >But I also vaguely recall something like dump of VGA registers
> > >when booted with -v, so they are stored somewhere, right?
> >
> > The video BIOS ROM contains the table of STANDARD register values only.
> > We cannot know which additional registers should be set to what value.
>
> Ok. Call me stubborn, but why can't we just write the STANDARD register
> values corresponding to the initial state of the card, and if the screen
> is still garbled, well <shrug> - at least we tried... But, my point is (or
> maybe I'm still wrong), that *most of the time* this will restore the card
> to some usable state...
It will only work on a std VGA card in a std mode. All moderne video cards
demands specific programming (or what do you think the thousands of lines
of code in Xfree86 does :) )
So your answer is it will not work most of the time, if at all.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Søren Schmidt (sos@FreeBSD.org) FreeBSD Core Team
Even more code to hack -- will it ever end
..
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