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Date:      Sun, 17 Sep 1995 19:25:42 +0000 ()
From:      Thomas Obermair <tommy@inlab.m.eunet.de>
To:        freebsd-questions@FreeBSD.ORG
Subject:   Bug 688 Panic with asus P55TP4XE90 
Message-ID:  <Pine.BSF.3.91.950917192348.269A-100000@inlab.m.eunet.de>

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Hello folks,

I just want to tell you my story about upgrading from
a 486 33Mhz to a Pentium motherbord from asus called
P55TP4XE90. I am running FreeBSD 2.0.5 installed from
the cdrom. The attached drive is an 2.3 GB HP drive.
The Pentium installed is a 90Mhz Pentium.

After changing the motherboard and the SCSI controller
from an adaptec 1542A to an PCI 4290 the system comes
up very fastly as expected. (Some strange core-dumps
occured in the following process).

Trying to determine the better SCSI performance I was
running bonnie. The system crashes with a panic giving
something like:

Page fault: supervisor write, page not present

(This seems to be an already known bug-report with the
number 688 in GNATS)

After several tries my filesystem was so messed up 
(after several fsck's) that even the kernel wasn't
found anymore. So I decided to reinstall.

I was not able to reinstall sucsessfully. The system 
crashes at the time to make a newfs on the larger 
/usr-partition with the same panic.

FYI, the things I tried to solve this problem are:

- running the installation with an old Hercules card
- I changed the PCI 2940 back to the 1542A
- I tried nearly everything in the bios systematically
- I disabled internal and external caches
- I put down the system speed to 75 Mhz, all caching 
  disabled,

Then I was at my end. My conclusion is that is HAS to be the
motherboard or chipset. Now I am running my old system
again after reinstalling. 

I would be glad hearing from anyone who run into the
same difficulties. What's with bug no. 688 ? Is this
really an software bug ? (BTW. a reliable way to reproduce
this error could be bonnie). Should I buy another 
motherboard ?

Best regards,
Thomas

--

Thomas Obermair         | Inlab Software GmbH
tommy@inlab.m.eunet.de  | Josef-Wuerth-Str. 1
Fax: +49 89 6411160     | 82031 Gruenwald / Germany




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