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SubjectRe: syslog full of kernel BUGS, frequent intermittent instability
> cpuburn will help you rule out defective CPU theory.
> Also you can start removing/swapping hardware parts.
>
Thanks for taking the time to reply time, Dennis. I ran cpuburn as you suggested. Specifically, I ran the burnK6 binary for about an hour (from an xterm, and I also had other stuff like galeon running simultaneously) and didn't get any hiccups. Monitoring with top, I saw that I had 0% free cpu during the test.

However I also later ran the burnMMX binary, and that one would quit after running a few minutes without printing any error messages to the screen - nor did it leave any messages in /var/log/*. Dunno if that's normal? Shouldn't it keep running until I kill it?

Can I draw any conclusions thus far? Could I conclude now that the CPU and RAM are OK (because of the memtest86 and cpuburn tests)? Also, assuming that all of my hardware is OK (yes a big assumption), could the problems I have be due to a misconfiguration or otherwise software problem?

As for swapping parts, I don't have any extra computer parts. Given the nature of these kernel bug messages in the syslog, can I use that fact to logically limit the range of hardware that can cause these problems? I.E. can I say for example that malfunctioning PSU, RAM, CPU or Mobo can cause these symptoms, but that the ISA sound card, or the video card would not? Or do I have no choice but to suspect each and every piece of hardware in my box?

I would like to narrow things down if possible, but don't have the experience/knowledge to make these judgements myself. Which is why I seeking advice, of course.

> Test with some vanilla 2.4 kernels, not a distro one. If 2.4.20 crashes,
> try some of the earlier kernels too. Compile them for 386 uniprocessor
> with debugging and magic SysRq enabled. Provide your .config
>
As I mentioned to John, I'm still a newbie and don't feel comfortable yet in my competency to replace the kernel. I have a lot of (newbie) time invested in this installation and don't want to break it by messing with stuff that's way beyond my understanding.

> Run your klogd with -x to make it stop decoding oopses.
> Run oopses thru ksymoops and provide result.
>
I'm not clear whether you intended these suggestions to apply after I've changed the kernel, or also to my current setup.

Assuming you mean applying it currently - grepping for klogd in /etc shows that mandrake uses an environment variable KLOGD_OPTIONS to run klogd. This was set to "-2". However the variable is set to this value in no less than 32 different files. 24 of them see to be related to runlevels (4x6), and 8 unrelated. This means that (if my logic is correct) that the same variable is set 9 times for a particular runlevel (rl-3 in my case). Which one should I change that won't get overridden? Or should I change them all, or use another approach?

(Thanks again for your help - wyleus signing off)

> Provide lsmod, lspci output, some of /proc/* files (interrupts etc)

Assuming more is better than less;

# lspci
00:00.0 Host bridge: Acer Laboratories Inc. [ALi] M1541 (rev 04)
00:01.0 PCI bridge: Acer Laboratories Inc. [ALi] M1541 PCI to AGP Controller (rev 04)
00:02.0 USB Controller: Acer Laboratories Inc. [ALi] USB 1.1 Controller (rev 03)
00:07.0 ISA bridge: Acer Laboratories Inc. [ALi] M1533 PCI to ISA Bridge [Aladdin IV] (rev c3)
00:0f.0 IDE interface: Acer Laboratories Inc. [ALi] M5229 IDE (rev c1)
01:00.0 VGA compatible controller: 3Dfx Interactive, Inc. Voodoo Banshee (rev 03)

# lsmod
Module Size Used by Not tainted
tdfx 31524 1
agpgart 31840 0 (autoclean) (unused)
sr_mod 15096 0 (autoclean) (unused)
parport_pc 21672 1 (autoclean)
lp 6720 0 (autoclean)
parport 23936 1 (autoclean) [parport_pc lp]
ipt_TOS 984 12 (autoclean)
ipt_LOG 3384 5 (autoclean)
ipt_REJECT 2744 4 (autoclean)
ipt_state 568 9 (autoclean)
iptable_mangle 2072 1 (autoclean)
ip_nat_irc 2384 0 (unused)
ip_nat_ftp 2992 0 (unused)
iptable_nat 15224 2 [ip_nat_irc ip_nat_ftp]
ip_conntrack_irc 3056 1
ip_conntrack_ftp 3952 1
ip_conntrack 18400 4 [ipt_state ip_nat_irc ip_nat_ftp iptable_nat i
p_conntrack_irc ip_conntrack_ftp]
iptable_filter 1644 1 (autoclean)
ip_tables 11672 9 [ipt_TOS ipt_LOG ipt_REJECT ipt_state iptable_
mangle iptable_nat iptable_filter]
nfsd 66576 0 (autoclean)
lockd 46480 0 (autoclean) [nfsd]
sunrpc 60188 0 (autoclean) [nfsd lockd]
ppp_synctty 5952 1 (autoclean)
ppp_generic 20064 3 (autoclean) [ppp_synctty]
slhc 5072 0 (autoclean) [ppp_generic]
n_hdlc 6368 1 (autoclean)
nls_iso8859-1 2844 1 (autoclean)
nls_cp850 3580 1 (autoclean)
vfat 9588 1 (autoclean)
fat 31864 0 (autoclean) [vfat]
supermount 14340 1 (autoclean)
ide-cd 28712 0
cdrom 26848 0 [sr_mod ide-cd]
ide-scsi 8212 0
scsi_mod 90372 2 [sr_mod ide-scsi]
sb 7668 0
sb_lib 34958 0 [sb]
uart401 6628 0 [sb_lib]
sound 55732 0 [sb_lib uart401]
soundcore 3780 0 [sb_lib sound]
usb-ohci 18216 0 (unused)
usbcore 58304 1 [usb-ohci]
rtc 6560 0 (autoclean)
ext3 74004 2
jbd 38452 2 [ext3]

# cat /proc/interrupts
CPU0
0: 382609 XT-PIC timer
1: 8129 XT-PIC keyboard
2: 0 XT-PIC cascade
5: 1 XT-PIC soundblaster
8: 1 XT-PIC rtc
9: 1559 XT-PIC usb-ohci
12: 48716 XT-PIC PS/2 Mouse
14: 12691 XT-PIC ide0
15: 7 XT-PIC ide1
NMI: 0
LOC: 0
ERR: 0
MIS: 0

# cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 5
model : 8
model name : AMD-K6(tm) 3D processor
stepping : 12
cpu MHz : 350.810
cache size : 64 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr mce cx8 pge mmx syscall 3dnow k6_mtrr
bogomips : 699.59

# cat /proc/devices
Character devices:
1 mem
2 pty/m%d
3 pty/s%d
4 tts/%d
5 cua/%d
6 lp
7 vcs
10 misc
14 sound
29 fb
108 ppp
128 ptm
136 pts/%d
162 raw
180 usb
226 drm

Block devices:
1 ramdisk
3 ide0
9 md
11 sr
22 ide1

# cat /proc/dma
1: SoundBlaster8
4: cascade

# cat /proc/filesystems
nodev rootfs
nodev bdev
nodev proc
nodev sockfs
nodev tmpfs
nodev shm
nodev pipefs
ext2
nodev ramfs
nodev devfs
nodev devpts
ext3
nodev usbdevfs
nodev usbfs
nodev supermount
vfat

# cat /proc/iomem
00000000-0009fbff : System RAM
0009fc00-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000f0000-000fffff : System ROM
00100000-07ffffff : System RAM
00100000-0022614c : Kernel code
0022614d-0029547f : Kernel data
c7c00000-cbcfffff : PCI Bus #01
c8000000-c9ffffff : 3Dfx Interactive, Inc. Voodoo Banshee
cbe00000-cfefffff : PCI Bus #01
cc000000-cdffffff : 3Dfx Interactive, Inc. Voodoo Banshee
dffff000-dfffffff : Acer Laboratories Inc. [ALi] USB 1.1 Controller
dffff000-dfffffff : usb-ohci
e0000000-e3ffffff : Acer Laboratories Inc. [ALi] M1541
fec00000-fec00fff : reserved
fee00000-fee00fff : reserved
fffe0000-ffffffff : reserved

# cat /proc/ioports
0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0070-007f : rtc
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
0170-0177 : ide1
01f0-01f7 : ide0
0213-0213 : isapnp read
0220-022f : soundblaster
0330-0333 : MPU-401 UART
0376-0376 : ide1
0378-037a : parport0
03c0-03df : vga+
03f6-03f6 : ide0
0a79-0a79 : isapnp write
0cf8-0cff : PCI conf1
c000-cfff : PCI Bus #01
cc00-ccff : 3Dfx Interactive, Inc. Voodoo Banshee
ffa0-ffaf : Acer Laboratories Inc. [ALi] M5229 IDE
ffa0-ffa7 : ide0
ffa8-ffaf : ide1

# cat /proc/pci
PCI devices found:
Bus 0, device 0, function 0:
Host bridge: Acer Laboratories Inc. [ALi] M1541 (rev 4).
Master Capable. Latency=64.
Non-prefetchable 32 bit memory at 0xe0000000 [0xe3ffffff].
Bus 0, device 1, function 0:
PCI bridge: Acer Laboratories Inc. [ALi] M1541 PCI to AGP Controller (rev 4).
Master Capable. Latency=64. Min Gnt=11.
Bus 0, device 2, function 0:
USB Controller: Acer Laboratories Inc. [ALi] USB 1.1 Controller (rev 3).
IRQ 9.
Master Capable. Latency=64. Max Lat=80.
Non-prefetchable 32 bit memory at 0xdffff000 [0xdfffffff].
Bus 0, device 7, function 0:
ISA bridge: Acer Laboratories Inc. [ALi] M1533 PCI to ISA Bridge [Aladdin IV] (rev 195).
Bus 0, device 15, function 0:
IDE interface: Acer Laboratories Inc. [ALi] M5229 IDE (rev 193).
IRQ 14.
Master Capable. Latency=32. Min Gnt=2.Max Lat=4.
I/O at 0xffa0 [0xffaf].
Bus 1, device 0, function 0:
VGA compatible controller: 3Dfx Interactive, Inc. Voodoo Banshee (rev 3).
IRQ 11.
Non-prefetchable 32 bit memory at 0xcc000000 [0xcdffffff].
Prefetchable 32 bit memory at 0xc8000000 [0xc9ffffff].
I/O at 0xcc00 [0xccff].

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