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From: John Baldwin <jhb@freebsd.org>
To: freebsd-current@freebsd.org,
 Xin Li <delphij@delphij.net>
Subject: Re: -CURRENT userland regression
Date: Thu, 21 Feb 2013 10:31:31 -0500
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 (bigwig.baldwin.cx); Thu, 21 Feb 2013 10:50:11 -0500 (EST)
Cc: Navdeep Parhar <nparhar@gmail.com>
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On Wednesday, February 20, 2013 5:21:50 pm Navdeep Parhar wrote:
> On 02/20/13 14:14, Xin Li wrote:
> > Hi,
> > 
> > It seems that fresh -HEAD would give an unusable kernel that
> > overwrites screen buffer in a way making it impossible to debug.
> > Using an old world source to do 'make buildworld buildkernel' results
> > in a (mostly: I have some strange USB issue right now and still
> > looking for the cause) usable kernel.
> > 
> > For now my known good combination is world 246858 with kernel 247057.
> >  I'm still trying to find out which revision have broke the stuff.
> 
> I ran into this earlier today.  Selecting "safe mode" in the boot loader
> menu seems to work around the problem on my system.  Now I will not
> reboot until I see a fix for this in head :-)

"safe mode" toggles a few different things IIRC, can you narrow it down to a 
single setting?

-- 
John Baldwin