From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263385AbTH0OVN (ORCPT ); Wed, 27 Aug 2003 10:21:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263394AbTH0OVN (ORCPT ); Wed, 27 Aug 2003 10:21:13 -0400 Received: from 213.237.25.228.adsl.van.worldonline.dk ([213.237.25.228]:59952 "EHLO www.zensonic.dk") by vger.kernel.org with ESMTP id S263385AbTH0OVL (ORCPT ); Wed, 27 Aug 2003 10:21:11 -0400 Date: Wed, 27 Aug 2003 16:20:35 +0200 From: "Thomas S. Iversen" To: linux-kernel@vger.kernel.org Subject: Help with debugging of a framebuffer driver on a legacyfree system. Message-ID: <20030827142035.GA25937@zensonic.dk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.3.28i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi there As part of a project I am trying to write a framebuffer device driver for a graphic chip. Up until now I have compiled my code as a module and been doing insmod, rmmod and that have worked nicely. I then tried to compile the driver into the kernel but that makes the kernel hang. As my development system are a legacy free laptop and my driver initializes the screen, the kernel hangs without me being able to figure out where and why that happend. So I seek advice on how to debug the driver! As said, the laptop are legacy free, so I have not got a serial port. I have tried a usb->serial adapter, but that requires a driver. Can I do USB->USB on another computer? Or? Or am I stuck with coding my own printk variant and writing to the screen or is there any other option I have not thought of? Regards Thomas, Denmark