[Nut-upsdev] Re: Serial Ports (Was Re: Common Power Management
: NUT and HAL (stage 1))
david at fubar.dk
Tue Sep 19 12:21:14 PDT 2006
On Fri, 2006-09-15 at 23:43 +0100, Matthew Garrett wrote:
> On Wed, Sep 13, 2006 at 09:04:32PM -0400, David Zeuthen wrote:
> > Also: we certainly can't run serial PNP probing automatically, only in
> > response to a user choice of deciding to probe for serial ports. I say
> > this because maybe it will crash some old devices or some that don't
> > support Serial PNP. This is correct, yes?
> The protocol is designed in such a way that it's unlikely to trigger
> anything bad, but it's potentially possible that some hardware will do
> mad things when standard serial lines are asserted. I've /heard/ horror
> stories that some UPSes will power off when they see a PnP query - does
> anyone actually have a verified case of this happening?
> There would certainly be issues doing PnP on a serial port being used as
> a serial console, but that's true of any serial port that's currently in
Right. I only asked to see if we want to run serial PNP as part of the
hald startup.. for auto-configuration of serial ports.. Looks like,
based on the feedback in this thread, that we don't want to do that.
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