From: Sam Ravnborg <sam@ravnborg.org>
To: Paul Smith <paul@mad-scientist.net>, Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: linux-embedded@vger.kernel.org
Subject: Re: Can I manage/modify console baud rates from userspace?
Date: Sun, 2 May 2010 22:25:34 +0200 [thread overview]
Message-ID: <20100502202534.GA29535@merkur.ravnborg.org> (raw)
In-Reply-To: <1272816895.27961.1131.camel@homebase>
On Sun, May 02, 2010 at 12:14:55PM -0400, Paul Smith wrote:
> On Sun, 2010-05-02 at 11:58 +0200, Marco Stornelli wrote:
> > 02/05/2010 02:02, Paul Smith wrote:
> > > I've looked at setserial and it supports a baud_base parameter but that
> > > doesn't appear to be what I want (I tried it anyway: changing it didn't
> > > work, my console output was still screwed up).
> > >
> > > Trying to do something like creating customized PXE configs on the
> > > server based on the MAC addresses of the blades that are "new" (or old)
> > > would be an absolute nightmare as people swap blades between chassis,
> > > add new ones, etc. all the time.
> > >
> > >
> > > Please help me find a better way... :-(
> > >
> >
> > It's strange that it's not possible to change the baud rate, but I'm not
> > an expert of tty layer. A naive implementation could be patch the kernel
> > to choose a well-known baud rate for your hw reading a revision register
> > or something like that.
>
> I guess; I'd hate to have to modify the kernel like that though. Plus,
> as far as I'm aware at the moment the only way to tell these blades
> apart is through querying IPMI which would be a serious bummer to try to
> do via the kernel, I believe. Maybe there's some other way to do it
> that's simpler.
>
> Still hoping someone will say "all you have to do is XYZZY..." Anyone?
I would suggest asking Alan Cox - he if anyone would know.
I lost the original mail and context above is missing some details.
Anyway added to this mail.
Sam
next prev parent reply other threads:[~2010-05-02 20:25 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-02 0:02 Can I manage/modify console baud rates from userspace? Paul Smith
2010-05-02 9:58 ` Marco Stornelli
2010-05-02 16:14 ` Paul Smith
2010-05-02 20:25 ` Sam Ravnborg [this message]
2010-05-03 17:28 ` Paul Smith
2010-05-03 19:17 ` Alan Cox
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