From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ross Boylan Subject: Serial/Parallel conflicts Date: Wed, 29 Jan 2003 09:07:50 -0800 Sender: linux-serial-owner@vger.kernel.org Message-ID: <20030129170750.GA1066@wheat.boylan.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline List-Id: linux-serial@vger.kernel.org To: linux-serial@vger.kernel.org Cc: Ross Boylan I've had some success with the problems reported earlier, but seem to have created a new problem. I went into the BIOS and changed the settings for the serial ports from "AUTO" to Port A: 3f8/com1 Port B: 2f8/com2 My hope was that by setting COM2 to 2f8 explicitly I would get rid of the "LSR safety check" warning on ttyS1. As a result, the messages when I started up went from: Jan 19 10:30:05 wheat kernel: ttyS00 at 0x03f8 (irq = 4) is a 16550A Jan 19 10:30:05 wheat kernel: ttyS02 at 0x03e8 (irq = 4) is a 16550A Jan 19 10:30:05 wheat kernel: ttyS01 at port 0x02f8 (irq = 3) is a 16550A to: Jan 29 05:47:49 wheat kernel: ttyS00 at 0x03f8 (irq = 4) is a 16550A Jan 29 05:47:49 wheat kernel: ttyS01 at 0x02f8 (irq = 3) is a 16550A Jan 29 05:47:49 wheat kernel: ttyS02 at port 0x03e8 (irq = 5) is a 16550A and I no longer got the "LSR safety check engaged" message. (Note also the change in order of the reports). Unfortunately, my parallel port stopped working: Jan 29 08:45:12 wheat kernel: lp: driver loaded but no devices found I notice that if I do not pick auto for the parallel port, I am given a manual choice of IRQ 5 or 7 for it. 7 is used by my soundcard, and as noted above, 5 is being used by ttyS02 (modem). I set my BIOS back to AUTO for all ports, but I still see the second configuration reported above. This has not reverted things to their previous state. I can think of 3 possible reasons: 1. the hardware is saving state 2. the hardware is saving state because I rebooted without powering off 3. Linux is saving state. So I have several questions. What is going on? How can I get my printer (LPT1) back? Is there any way I can make all my devices happy (i.e, no LSR safety check for the serial ports and working parallel port)? I have an AMIBIOS with a setting of "Non-PNP OS". 2.4.19 kernel. Thanks.