Hello Don, Thanks for thinking with me, but if it was that simple I would not have bothered the list. I have been running AX.25 trough the kernel for about 3 years now, with an 2.0.36 kernel, so this is not a problem (I am even the author of the HAM packages on the SuSE CD). Anyway, even if I made a complete mess of it, it should never ever freeze the machine (unless wrong IO adresses and interrupts were configured which is not the case). I suspect that the AX.25 stuff for the 2.4 kernel is not okay yet. I applied the patch to the YAM modem module by OK1ZIA to get rid of the "kfree_skb on hard IRQ" and the "Bad boy" kernel messages. It did not solve the problem. I noted that it is not an FBB problem. I have some home-made tools to do reverse forwarding to fetch bulletins. These run for a while but eventually also hangs the system. It seems to occur upon closing the connection or closing the socket, at least I saw it 3 times lockup exactly at that point. Thanks to a suggestion by Jean-Paul ROUBELAT (F6FBB) I tried the 2.2.19 kernel packaged with SuSE (I did not realize one was there, I already started thinking about downgrading). This seems to run just fine. Both FBB and my home-made tool stays up. So at least this is a bypass for now and also its pritty sure this is a kernel problem and not something else. I just compiled the latest kernel 2.4.15-pre6 from www.kernel.org (first tried 2.4.14 but the loop device did not compile, so I patched it with the latest patch). This is a bleeding edge kernel now. I'm still fighting with it as the new kernel cannot find the reiserfs module at bootup (yes, it is there, but maybe in the wrong place...). Anyway, no results from that yet (changes to the AX.25 parts compared to SuSE's kernel are minimal, so I don't expect much). Kind regards, Henk. ----- Oorspronkelijk bericht ----- Van: Don Hawkins - W7DAH Aan: Henk de Groot ; suse-ham-e@suse.com Verzonden: zondag 18 november 2001 16:36 Onderwerp: Re: [suse-ham-e] SuSE 7.3 System crash with FBB Henk, Have you visited this resource: http://www.linuxselfhelp.com/howtos/AX25/AX25-HOWTO.html (Only thing I can offer just now, sorry)?