My /var/log/messages: ------------------ Unable to handle kernel NULL pointer dereference at virtual address 00000018 printing eip: c013c0da *pde = 00000000 Oops: 0000 CPU: 0 EIP: 0010:[pipe_write+110/628] EFLAGS: 00010246 eax: 00000000 ebx: c37347c0 ecx: c1f7a6c8 edx: c37347c0 esi: 00000000 edi: c1f7a660 ebp: 0000001e esp: c25dbf7c ds: 0018 es: 0018 ss: 0018 Process apm (pid: 11148, stackpage=c25db000) Stack: c37347c0 ffffffea 00000000 0000001e c1f7a6c8 fffffe00 00000000 00001000 c013259b c37347c0 40016000 0000001e c37347e0 c25da000 0000001e 40016000 bffffca8 c0106e63 00000001 40016000 0000001e 0000001e 40016000 bffffca8 Call Trace: [sys_write+143/196] [system_call+51/64] Code: 83 7e 18 00 0f 84 c4 01 00 00 c7 44 24 1c 01 00 00 00 81 fd ------------------- what does it mean? after that, the box hangs although the video image was there, there was no response from keyboard, ping. Regards, Freddy Chavez.