site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com $ nvram boot-args="debug=0xd44 _panicd_ip=192.168.63.40" and checking some: $ nvram -p [...] boot-device pci/ACARD,6880M@4/@0:2,\\:tbxi load-base 0x800000 [...] boot-args debug=0xd44 _panicd_ip=192.168.63.40 I then loaded the InstantPanic.kext for testing (see the TN): $ kextload /InstantPanic.kext the machine panicked and the core dump was there: $ file core-xnu-792-192.168.63.37-61964bd2 core-xnu-792-192.168.63.37-61964bd2: Mach-O core ppc but gdb cannot use it: a bt just gives (I even loaded the mach_kernel symbol table): (gdb) bt Unable to read register data from core file #0 0xfeedface in ?? () Note that the file is tiny: 2926592 bytes. Perhaps a problem during the dump? Thank you in advance for any advice you can give me Giuliano _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.appl... I followed the advice in the TN2118 to enable a kdumpd server machine on the LAN of a troublesome 10.4.8 machine (the trouble started after applying the 2006-007 security update) called here the client. I set the client as per the TN, and here the first problem appeared. After setting the boot-args: I restarted the machine, but it hung in the startup process with a "no access" road sign.. I then had it restarted with the option pressed to reselect the disk, and it worked (all this at a remote site with a collaborator). I rechecked that the boot-args were still set and they were. $ gdb -c core-xnu-792-192.168.63.37-61964bd2 GNU gdb 6.3.50-20050815 (Apple version gdb-573) (Fri Oct 20 15:54:33 GMT 2006) [...] This GDB was configured as "powerpc-apple-darwin". unable to read unknown load command 0x0 and so on.... Also, since the problem with this machine is more a hung than a panic (I have no kernel panics in /Library/Logs/ and when hung the display just shows the rainbow wheel), should I force a NMI to cause a dump when this happens? This email sent to site_archiver@lists.apple.com