From: ebiederm@xmission.com (Eric W. Biederman)
To: Barry Wu <wqb123@yahoo.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: about serial console problem
Date: 24 Jul 2001 14:10:44 -0600 [thread overview]
Message-ID: <m17kwyhyuz.fsf@frodo.biederman.org> (raw)
In-Reply-To: <20010723065212.31153.qmail@web13901.mail.yahoo.com>
In-Reply-To: <20010723065212.31153.qmail@web13901.mail.yahoo.com>
Barry Wu <wqb123@yahoo.com> writes:
> Hi, all,
>
> I am porting linux 2.4.3 to our mipsel evaluation
> board. Now I meet a problem. Because I use edown
> to download the linux kernel to evaluation board.
> I update the serial baud rate to 115200.
> I use serial 0 as our console, and I can use
> printk to print debug messages on serial port.
> But after kernel call /sbin/init, I can not
> see "INIT ... ..." messages on serial port.
> I suppose perhaps I make some mistakes. But when
> I use 2.2.12 kernel, it ok.
> If someone knows, please help me. Thanks!
It's a bug in init. INIT clears the CREAD flag which means all reads
to the console will be dropped. Why it /sbin/init works before 2.4.3
is a mystery.
Eric
next prev parent reply other threads:[~2001-07-24 20:17 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-07-23 6:52 about serial console problem Barry Wu
2001-07-24 20:10 ` Eric W. Biederman [this message]
2001-07-24 22:29 ` Robert J.Dunlop
2001-07-25 8:52 ` Eric W. Biederman
2001-07-25 11:12 ` Robert J.Dunlop
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