Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 5 Oct 2002 15:54:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 5 Oct 2002 15:54:22 -0400 Received: from caramon.arm.linux.org.uk ([212.18.232.186]:5387 "EHLO caramon.arm.linux.org.uk") by vger.kernel.org with ESMTP id ; Sat, 5 Oct 2002 15:54:21 -0400 Date: Sat, 5 Oct 2002 20:59:54 +0100 From: Russell King To: jbradford@dial.pipex.com Cc: linux-kernel@vger.kernel.org Subject: Re: 2.5.x and 8250 UART problems Message-ID: <20021005205954.A1682@flint.arm.linux.org.uk> References: <200210051506.g95F6jfL000423@darkstar.example.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i In-Reply-To: <200210051506.g95F6jfL000423@darkstar.example.net>; from jbradford@dial.pipex.com on Sat, Oct 05, 2002 at 04:06:45PM +0100 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1013 Lines: 24 On Sat, Oct 05, 2002 at 04:06:45PM +0100, jbradford@dial.pipex.com wrote: > The 486 SX-20 with 4 MB RAM, running 2.2.21 reliably achieves about 650 > BPS download from another machine, with the port runnnig at 9600 bps. > With 2.5.40, many characters are lost at 9600, making, e.g. a ZModem > transfer retry for almost every block. Ok, we need to find out where stuff is getting dropped. Dumping /proc/tty/driver/serial is always a good idea when reporting anything like this. The important thing is the change in the counters. Can you supply the port in question both before and after the zmodem run please? Thanks. -- Russell King (rmk@arm.linux.org.uk) The developer of ARM Linux http://www.arm.linux.org.uk/personal/aboutme.html - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/