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Linux box keeps freezing

Linux box keeps freezing

Post by B. Matthew Knap » Wed, 10 Sep 1997 04:00:00



I have a cyrix 6x86 box running 2.0.29 Slackware 3.2 flavored Linux. It
was a very happy stable machine until 2 days ago, at which point I added
a SCSI card and re-mounted the motherboard. (The mother board was
previously sitting on one post and a couple plastic supports).  Since
then the box has been very unhappy. Between 1 and 6 hours of booting up,
it freezes completely - no response to mouse or keyboard, no response on
the network, just dead, power cycle blues.

I have tried: re-seating all cards.  re-seating all memory. removing the
SCSI card.  I have 2 16M and 2 32M SIMMS, I tried removing one pair and
then the other pair.  I ran a boot-time Memory check program which
reported no errors.  I took the computer apart completely, pulled all
cards and SIMMs off the motherboard, looked for anything loose or
broken, re-seated the motherboard again, remounted all the cards, turned
it on. fine for 6 hours then <crash> dead again.

once, when it crashed, it actually rebooted and failed immediately after
the partition check with the following messages:

Kernel NULL pointer error
general protection: 0000
CPU: 0
EIP: 0010:[<001114d0>]
EFLAGS: 00010046
eax: 00000000  ebx: 001ef5c4   ecx: fffffc18   edx: 00000000
esi: 00000000  edi: 00000000   ebp: 001f1c0b   esp: 001f1bd0
ds: 0018  es: 0018  fs: 002b  gs: 0018  ss: 0018
Process Swapper (pid: 0, process nr: 0, stackpage=001efcb8)
stack: 0010fbcc 001f1c0c   etc.
Call Trace: [>0010fbcc>] [<0010c8bd>]....etc
Code: f6 41 3a 02 75 3c f6 41 34 03 75 36 ff 05 48 31 1f 00 8b 15
Aiee, killing interrupt handler
kfree of nonkmalloced memory: 001f1d00, next= 00000000, order 0

I re-compiled the kernel image and that made it  happy, but still
crashes after 1-5 hours.  this is very * the disks, not to mention
*y annoying.  Anyone got advice on what to check / swap in/out,
inspect etc. etc.???

current config includes:
Mirage Z-2000 video card
generic PCI Ethernet Card
PCI SCSI Card (Advansys)
USR Sporster fax-modem
2 16M SIMMs
2 32M SIMMs
2 hard drives, 2.5g and 2.1g
1 CD-ROM, 1 floppy, 1 DAT attached to SCSI card.
cyrix 6x86 cpu, 256K cache.
Micronics D5CUB motherboard

many thanks,
(also, is there another group I should post to?)

M<
--
************************************************************************
Matt Knapp: Wind Tunnel Test Engineer - Pioneer Rocketplane
Now living in Seattle!  Hello Latte land!
************************************************************************

 
 
 
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Linux box keeps freezing

Post by Patience Fen » Wed, 10 Sep 1997 04:00:00



> I have a cyrix 6x86 box running 2.0.29 Slackware 3.2 flavored Linux. It
> was a very happy stable machine until 2 days ago, at which point I added
> a SCSI card and re-mounted the motherboard. (The mother board was
> previously sitting on one post and a couple plastic supports).  Since
> then the box has been very unhappy. Between 1 and 6 hours of booting up,
> it freezes completely - no response to mouse or keyboard, no response on
> the network, just dead, power cycle blues.

Does the SCSI card get heatup?  Could adding the card cause the whole system to overheat?

You might want to post your message also on   comp.os.linux.setup

I wish you the best of luck.  Don't stress!  : )

     ___________________________________________________

        Patience Feng (Pei-shen)

                 __________________________________________________

 
 
 
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1. Unable to keep Linux box on network - keeps "disappearing"

    I'm having a bit of trouble with network configuration here, setting
up linux on a 386 here.  Basically, it doesn't stay visible on the network
for longer than a few minutes.  No problems connecting to other machines
from this 386 using ping, nslookup, telnet.  With other machines
connecting to here though (i.e., ping), the 386 "disappears" from the
network after a few minutes.  After that, nothing can to connect it until
I run nslookup or ping (as an example) - then its is "visible" again, but
only for a few minutes.

    I've skimmed through the NET-2 howto and parts of the Net Admin Guide
without finding anything.  I tried using tcpdump/icmpinfo to see what's
happening, but they aren't too helpful (it would be more useful if I had a
second machine to run it on to check the 386 - as it is, running tcpdump
on the 386 with tcpdump dst host 144.25.60.116 stops generating messages
once the 386 disappears from the network.)  I can keep the machine visible
if I run nslookup on a random machine continuously in a loop at minute
intervals.

Machine setup:
Slakware 2.3.0 (kernel 1.2.8)
Etherlink II (3c503 ISA) using AUI connector

Output of "ifconfig eth0":
eth0      Link encap:10Mbps Ethernet  HWaddr 02:60:8C:0C:BA:FB
          inet addr:144.25.60.116  Bcast:144.25.63.255  Mask:255.255.252.0
          UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
          RX packets:1103958 errors:0 dropped:850 overruns:0
          TX packets:45945 errors:0 dropped:0 overruns:0
          Interrupt:5 Base address:0x280 Memory:c8000-ca000

Output of "route -n":
Kernel routing table
Destination     Gateway         Genmask         Flags MSS    Window Use Iface
144.25.60.0     *               255.255.252.0   U     1436   0     1270 eth0
127.0.0.0       *               255.0.0.0       U     1936   0       13 lo
default         144.25.60.1     *               UG    1436   0    31835 eth0

    I have source/patches for 1.2.11 and 1.3.9 of the kernel, but wanted
to get this problem fixed first (it would be nice to be able to dial-in
and recompile the kernel while at home.)

    Any ideas on what the problem is or what else I should try to
determine the cause of the problem?  (I remember reading a similar problem
mentioned many, many months ago here, but cannot remember the outcome.)  I
was going to look for another ethernet board on Monday to test with.  Is
there any other information I need to provide which would be helpful?

summary/solution of the problem.  Thanks-

--
Jimmy Yu

Oracle Corporation

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