site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com I'd try and get a kernel core dump. <http://developer.apple.com/technotes/tn2004/tn2118.html> <http://developer.apple.com/documentation/Darwin/Conceptual/KernelProgramming/build/chapter_18_section_5.html#//apple_ref/doc/uid/TP30000905-CH221-CIHDEDFH> #options SERIAL_CONSOLE_DEFAULT Good luck! S+E -- Quinn "The Eskimo!" <http://www.apple.com/developer/> Apple Developer Technical Support * Networking, Communications, Hardware _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.a... At 12:00 +0530 29/8/05, Karunakar Reddy G wrote: 3. I have custom usb driver on my Mac OS X 10.4 system, it is going to crash after 30 hours and no display on monitor (Like Backtrace , program counter etc..) during crash. Which is the best debugging method to adopt for this problem? If that fails, things get harder. You have to recompile the kernel with serial debugging (ddb) enabled. Of course, you'll have to run on a machine with built-in serial, which is hard to find these days. There are instructions for this (to my extreme surprise!) in the "Kernel Programming" book on our web site: The instructions are a little out of date. Specifically, to enable serial console support, you no longer need to change "osfmk/ppc/serial_console.c". Rather, you can just change the PPC build configuration file "xnu/osfmk/conf/MASTER.ppc" by uncommenting the following line. This email sent to site_archiver@lists.apple.com