From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265866AbUA1G4I (ORCPT ); Wed, 28 Jan 2004 01:56:08 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265869AbUA1G4I (ORCPT ); Wed, 28 Jan 2004 01:56:08 -0500 Received: from mail08a.verio.de ([213.198.55.73]:63648 "HELO mail08a.verio.de") by vger.kernel.org with SMTP id S265866AbUA1G4G (ORCPT ); Wed, 28 Jan 2004 01:56:06 -0500 Message-ID: <40175CF0.9030903@physik.de> Date: Wed, 28 Jan 2004 07:55:44 +0100 From: Detlef Schmicker User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.0) Gecko/20020623 Debian/1.0.0-0.woody.1 X-Accept-Language: en MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: Lost characters on serial console Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Loop-Detect: 1 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hello, we loose characters on the serial consol during receiving at 115kbaud. Especially if the ide harddisk is used during reception. We use a 300MHz Goede MediaGX, with a 16550A serial port (16 byte FIFO). We tuned the Harddisk with hdparm, which reduced the problem, but it still exists. We tried several Kernels: 2.4.4, 2.4.20, 2.4.24 and 2.6.0 and several patches "preempt" and "low-lattency". No changes at all. We used ext2 and ReiserFS file system. There were some messages on this problem in the mailing list, but they are years old and we did not find real hints, how to solve. Can anybody help, can we help with debugging, testing? Thanks a lot Detlef Schmicker