Finally, after many crashes which I have not been able to capture, here is two Oops'es which I have transfered by hand from my one machine to another. Solid lockup I am afraid, only thing working was Alt-SysRq keys. # Oops #1 follows Unable to handle kernel paging request at virtual address 5b919ba8 printing eip: c01a66c2 *pde = 00000000 Oops: 0000 CPU: 0 EIP: 0010:[<c01a66c2>] EFLAGS: 00013086 eax: c5d0a200 ebx: 0000200a ecx: 00008028 edx: 5b919aa8 esi: 0000200a edi: 00000001 ebp: c02d4820 esp: c5061f4c ds: 0018 es: 0018 ss: 0018 Process X (pid: 800, stackpage=c5061000) Stack: c02d4120 00000001 00000000 bffff634 00000001 c01a437a 00000001 00000001 00000001 c02d4120 002d4820 c01a446d 00000001 00000000 c02ab580 c01a965f 00000001 00000006 00000000 c011984c 00000000 00000001 c02ab5d8 00000007 Call Trace: [<c01a437a>] [<c01a446d>] [<c01a965f>] [<c011984c>] [<c01197af>] [<c0108e2d>] Code: 8b 82 00 01 00 00 89 3d 28 46 2d c0 39 10 74 21 8b 81 20 48 Kernel panic: Aiee, killing interrupt handler! In interrupt handler - not syncing # Then I did Alt-SysRq-U and got the following SysRq: Emergency Remount R/O Remounting device 03:03 ... Scheduling in interrupt Kernel BUG at sched.c:688! invalid operand: 0000 CPU: 0 EIP: 0010:[<c0113e74>] EFLAGS: 00013286 eax: 0000001b ebx: c5061dd8 ecx: 00000001 edx: c0263b88 esi: c11fc240 edi: c5060000 ebp: c5061dc4 esp: c5061d94 ds: 0018 es: 0018 ss: 0018 Process X (pid: 800, stackpage=c5061000) Stack: c021c765 c021c8b6 000002b0 c5061dd8 c11fc240 c5060000 c0119a44 c02d5b60 c5061dd8 c11fc240 00000000 c02d5bc4 00000000 c013106a c39a7240 00000303 00000001 00000000 c5060000 c11fc28c c11fc28c c0131114 c11fc240 00000303 Call Trace: [<c0119a44>] [<c013106a>] [<c0131114>] [<c0131288>] [<c01b0b64>] [<c01b0c2b>] [<c0115cae>] [<c011865f>] [<c010923e>] [<c0113447>] [<c0113124>] [<c0131ee3>] [<c0131f53>] [<c014cb63>] [<c0121e7f>] [<c0108e7c>] [<c01a66c2>] [<c01a437a>] [<c01a446d>] [<c01a965f>] [<c011984c>] [<c01197af>] [<c0108e2d>] Code: 0f 0b 8d 65 dc 5b 5e 5f 89 ec 5d c3 55 89 e5 83 ec 10 57 56 Kernel panic: Aiee, killing interrupt handler! In interrupt handler - not syncing This should be fairly accurate. I did my best to copy it across w/o mistakes. After rebooting I got these stats out. -- Versions installed: (if some fields are empty or look -- unusual then possibly you have very old versions) Linux alien 2.4.0-ac12 #2 Thu Feb 1 11:51:08 GMT 2001 i686 unknown Kernel modules 2.3.17 Gnu C 2.95.2 Gnu Make 3.79.1 Binutils 2.10.0.26 Linux C Library 2.1.3 Dynamic Linker ldd (GNU libc) 2.1.3 Procps 2.0.7 Mount 2.10o Net-tools 1.57 Console-tools 0.2.3 Sh-utils 2.0 Modules Loaded tulip_cb cb_enabler ibmtr_cs ds i82365 pcmcia_core ipt_REDIRECT ipt_MASQUERADE ip_nat_ftp iptable_nat iptable_mangle iptable_filter ipt_unclean ipt_tos ipt_state ipt_owner ipt_multiport ipt_mark ipt_mac ipt_limit ipt_TOS ipt_REJECT ipt_MIRROR ipt_MARK ipt_LOG ip_tables ip_conntrack_ftp ip_conntrack mpu401 sb sb_lib uart401 sound soundcore If any more details should be required, I will be more than happy to try and get them. The interesting thing was that the system reported all filesystems clean upon boot. (!) /Anders - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/