Re: Break on serial port

From: Russell King (
Date: Tue Jun 11 2002 - 11:35:20 EST

On Tue, Jun 11, 2002 at 11:41:26AM -0400, cfowler wrote:
> I remeber a while back being able to send a break on serial console.
> I've been unable to do this under 2.4.17. Has this feature been turned
> off? Is there a way to turn it back on?

It works fine here. Please confirm that:

1. your kernel is built with CONFIG_MAGIC_SYSRQ
2. cat /proc/sys/kernel/sysrq returns '1'
3. the serial console port is being held open by some user program (eg,
   getty or init)

If any of the three above are not true, then break<sysrq-key> doesn't work.

Russell King (                The developer of ARM Linux

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