From: "H. Peter Anvin" <hpa@zytor.com>
To: linux-kernel@vger.kernel.org
Subject: Re: sysrq on serial console
Date: 27 Sep 2002 17:29:42 -0700 [thread overview]
Message-ID: <an2t5m$rto$1@cesium.transmeta.com> (raw)
In-Reply-To: 3D94ED88.5040407@us.ibm.com
Followup to: <3D94ED88.5040407@us.ibm.com>
By author: Dave Hansen <haveblue@us.ibm.com>
In newsgroup: linux.dev.kernel
>
> Since the serial cleanups happened in 2.5, Magic Sysrq doesn't work
> for me on the serial console.
>
It's been broken for me in several 2.4 versions as well. This is
highly troublesome.
> It looks like the UART_LSR_BI bit needs to be set in the status
> variable for the break character to be interpreted as a break in the
> driver.
>
> I doubt that it is actually broken, but it isn't immediately obvious
> how that bit gets set. Is there something that I should have set when
> the device was initialized to make sure that UART_LSR_BI is asserted
> in "status" when the interrupt occurs?
--
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt <amsp@zytor.com>
next prev parent reply other threads:[~2002-09-28 0:24 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-27 23:45 sysrq on serial console Dave Hansen
2002-09-28 0:29 ` H. Peter Anvin [this message]
2002-09-28 8:06 ` Russell King
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