kern/166262: [syscons] syscons issue on DN2800MT

[Jung-uk Kim]

The following reply was made to PR kern/166262; it has been noted by GNATS.

From: Jung-uk Kim <jkim at FreeBSD.org>
To: bug-followup at FreeBSD.org
Cc: frankreppin at googlemail.com
Subject: Re: kern/166262: [syscons] syscons issue on DN2800MT
Date: Fri, 23 Mar 2012 14:55:10 -0400

 > Hellos and thankyou for looking into this PR!
 > 
 > On Fri, Mar 23, 2012 at 12:03 AM, Jung-uk Kim <jkim at freebsd.org> 
 wrote:
 > > Hmm...  It seems these platforms don't fully initialize VGA
 > > registers.  According to the product pages, this board has "Intel
 > > Fast Boot Technology", which sounds like "we don't care about
 > > legacy VGA modes any more" to me. ;-)
 > well - when attempting to boot from the memstick images I can
 > clearly see everything - the whole 'BTX loader' stuff and everything
 > up to and until the 'Welcome to FreeBSD' boot menu. Up to this point
 > everything looks really ok. The 'messed up display' starts right
 > after pressing '1' to boot.
 >
 > Shouldn't it show the 'BTX loader' stuff garbled as well then if
 > they don't care about legacy VGA modes then?
 
 I am not so sure about that.  FYI, BTX uses BIOS int 10h calls and 
 kernel directly accesses VGA hardware and memory.
 
 > > I saw Intel's video presentation on YouTube and it showed a BIOS
 > > option to disable "Fast Boot" from Boot menu. Try to disable it if
 > > you have something similar, especially "Video Optimization" or
 > > something. 
 > Just re-checked on this. Those boot options are 'disabled' by
 > default (and disabled as well in my setup).
 
 Okay.
 
 > According to the inline BIOS help they won't do any magic beside not
 > showing the fancy Intel logo graphic.
 
 Maybe you do not have the BIOS that I saw from YouTube 
 presentation. :-(
 
 > They too state clearly there that this won't affect capabilities
 > when it comes to boot the OS.
 
 Which OS?  MS Windows? ;-)
 
 > There aren't any more video optimization inside the BIOS.
 
 I see.
 
 > Please let me know if I can be of help to get this sorted.
 
 Sorry, there is something strange going on with writing to video 
 memory.  That's all I can say ATM. :-/
 
 Jung-uk Kim