Serial console temporarily garbled

[neil.baylis@gmail.com (Neil Baylis)]

My apologies for the confusion, I meant ttyS0. I mistyped when composing
the email.

Neil

On Tue, Nov 22, 2011 at 10:43 AM, Dave Hylands <dhylands@gmail.com> wrote:

> Hi Neil,
>
> On Tue, Nov 22, 2011 at 10:20 AM, Neil Baylis <neil.baylis@gmail.com>
> wrote:
> > I'm working on an embedded system running a 2.6.32 kernel originally
> derived
> > from RHEL6.
> >
> > The hardware architecture is similar to a PC. The device is a specialized
> > server. It uses an 8250 compatible serial port for the console.
> >
> > When it's booting up, everything looks fine until it initializes the
> serial
> > driver. At that point the output to the console becomes garbled until (I
> > think...) getty runs for the console port. Then it's readable again.
> >
> > It looks as though the initialization of the serial driver is setting the
> > wrong baud rate, or perhaps some other configuration. During the boot
> > process, this garbled output happens for about 1 second, during which
> > probably a few thousand characters of garbage are output.
> >
> > The grub boot parameter specifies "console=ttys0,57600"
>
> Did you mean ttyS0? The capital S is significant.
>
> The serial ports default to 9600 baud, which is probably what the
> garbage coming out is.
>
> > The getty line for the console specifies "T0:23:respawn:/sbin/getty -L
> ttys0
> > 57600 vt100"
>
> This should probably also be ttyS0
>
> --
> Dave Hylands
> Shuswap, BC, Canada
> http://www.davehylands.com
>
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