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