I have posted referring to this in the past, but didn't get a full answer. However, tenacious as one is, I kept on trying... Here's the problem: I do get intermittent crashes on the system, namely kernel panics due to the kernel not being able to de-referencea NULL pointer, or kernel not being able to handle paging requests. Programs tend to segfault and provide me with a kernel panics and OOPS. Now, it all looks like the memory might be buggered somehow. However, I ran memtest86, and it seems to be fine (i.e., it reports no errors). Also, it might be the swap that's knackered (I haven't tested this one yet). Here's one of the kernel panix that effectively went into the logs: Apr 13 14:05:15 faust kernel: Unable to handle kernel NULL pointer derefere= nce at virtual address 00000008 Apr 13 14:05:15 faust kernel: current->tss.cr3 =3D 01566000, %cr3 =3D 01566= 000 Apr 13 14:05:15 faust kernel: *pde =3D 00000000 Apr 13 14:05:15 faust kernel: Oops: 0000 Apr 13 14:05:15 faust kernel: CPU: 0 Apr 13 14:05:15 faust kernel: EIP: 0010:[sock_poll+7/36] Apr 13 14:05:15 faust kernel: EFLAGS: 00010286 Apr 13 14:05:15 faust kernel: eax: 00000000 ebx: c2cc0580 ecx: 00000145= edx: c32c6960 Apr 13 14:05:15 faust kernel: esi: c32c6960 edi: 00000002 ebp: c1142000= esp: c1565f70 Apr 13 14:05:15 faust kernel: ds: 0018 es: 0018 ss: 0018 Apr 13 14:05:15 faust kernel: Process xmms (pid: 471, process nr: 29, stack= page=3Dc1565000) Apr 13 14:05:15 faust kernel: Stack: c1142000 00000002 081cefe8 00000018 c2= cc0570 c1564000 c1564000 00000000=20 Apr 13 14:05:15 faust kernel: c012fcd8 00000003 c2cc0570 c1142000 00= 000002 c1564000 00000001 081cefe8=20 Apr 13 14:05:15 faust kernel: bffffa3c c1142000 c1142000 fffffff2 c0= 109ccc 081cefe8 00000003 00000001=20 Apr 13 14:05:15 faust kernel: Call Trace: [sys_poll+244/364] [system_call+5= 2/56]=20 Apr 13 14:05:15 faust kernel: Code: 8b 40 08 05 9c 00 00 00 8b 48 08 ff 74 = 24 08 50 52 8b 41 20=20 Apr 13 14:05:15 faust kernel: VFS: Close: file count is 0 =00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00= =00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00= =00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00= =00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00= =00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00= =00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00=00Apr 13= 14:10:17 faust syslogd 1.3-3#33: restart. The last message (just before the " [at] "s) varies. This is one of the many flavours I get. As I said before, I believe my memory to be faulty, or my hard drive to be not in order. It happens with all sorts of kernels (2.2.12-onwards). I also get a number of "internal compiler errors" (error 11) (which again suggests a memory problem). My system: AMD K7 550MHz WS-6167 MoBo 64 Megs RAM My question is to see whether anyone has some ideas on things I can do to make sure that it is either the memory of the HD. Any hints? Thanks, Jos=E9 --=20 Jos=E9 L G=F3mez Dans PhD student Radar & Communications Group Department of Electronic Engineering University of Sheffield UK --------------------------------------------------------------------- Sheffield Linux User's Group - http://www.sheflug.co.uk To unsubscribe from this list send mail to - <sheflug-request [at] vuw.ac.nz> - with the word "unsubscribe" in the body of the message. GNU the choice of a complete generation.