wscons for FreeBSD?

Kris Kennaway kris at obsecurity.org
Sun Oct 30 02:48:15 PST 2005


On Fri, Oct 28, 2005 at 09:50:49PM -0600, M. Warner Losh wrote:
> In message: <4362B611.B4A12AF8 at verizon.net>
>             Sergey Babkin <babkin at verizon.net> writes:
> : John Baldwin wrote:
> : > 
> : > On Friday 28 October 2005 01:24 pm, Sergey Babkin wrote:
> : > > >From: John Baldwin <jhb at freebsd.org>
> : > > >
> : 
> : > > * When entering panic/debugger mode the console
> : > >   should reset its video mode to the one where
> : > >   the panic information is visible.
> : > 
> : > I think this might be kind of hard since you really don't know what X has done
> : > to the hardware unless you make X talk to the console driver to do
> : > everything.
> : 
> : Can you re-initialize the device from scratch? My knowledge
> : about the video hardware dates to SVGA times and even that
> : is not too deep.
> : 
> : Maybe provide a basic SVGA re-initialization routine on x86 and have
> : an interface for the third-party in-kernel drivers that
> : would contain the re-initialization routine.
> 
> When this has come up in the past, those in the know say that it takes
> card specific registers and knowledge to reset these cards' video
> modes.

Even if it doesn't work on all cards, if there's some method that will
at least work for a subset of configurations it may be worth
investigating: by that point the machine has panicked anyway, so
what's the worst that can happen?

Kris
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