i386/75847: system freeze on Medion laptop

[guzman at zalem.net]

>Number:         75847
>Category:       i386
>Synopsis:       system freeze on Medion laptop
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    freebsd-i386
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Jan 05 10:40:26 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     guzman
>Release:        FreeBSD 5.3-RELEASE i386
>Organization:
>Environment:
Medion Laptop
System: FreeBSD barjack.zalem.net 5.3-RELEASE FreeBSD 5.3-RELEASE #0: Fri Nov 5 04:19:18 UTC 2004 root at harlow.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386
CPU: Intel(R) Pentium(R) 4 CPU 2.40GHz (2390.31-MHz 686-class CPU)
real memory  = 534708224 (509 MB)
avail memory = 513576960 (489 MB)
agp0: <SiS 645DX host to AGP bridge> mem 0xd0000000-0xdfffffff at device 0.0 on pci0
atapci0: <SiS 962/963 UDMA133 controller> port 0x1000-0x100f,0x376,0x170-0x177,0x3f6,0x1f0-0x1f7 at device 2.5 on pci0
rl0: <RealTek 8139 10/100BaseTX> port 0x1800-0x18ff mem 0xe0004000-0xe00040ff at device 8.0 on pci0
ad0: 38154MB <HITACHI DK23DA-40/00J0A0A1> [77520/16/63] at ata0-master UDMA100
acd0: CDRW <QSI CD-RW/DVD-ROM SBW-241/VF02> at ata1-master PIO4

>Description:
The computer is brand new.
The problem is that FreeBSD freeze all the time, whatever I tried to do. It just freeze the screen, there is no kernel panic, no self reboot, and I have to power the computer down manually.

I've tried with and without ACPI, Safe Mode from beastie boot, disabling write caching (which just delays the freezing), with or without apic (it was mentionned on a thread somewhere), with or without soft-update.
The kernel mentionned in send-pr is GENERIC, but I've also recompiled my own kernel, and it does the same.
I've runned test on hard disk to see if it's broken or what, even erase all data. Nothing works (note that during those test, system never hang).
I don't know what more to try. 

I've also tried 4.10 release, it won't even pass the boot process, it hangs on ata initialization, says an ata command times out, trying to reset the ata bus and crash.

I've also a Windows XP installed on the same disk, and it works well.

Just to mention it, during install, fdisk complains about my disk geometry, and set a new one, but when booting, the geometry back to the original one :
cylinders=77520 heads=16 sectors/track=63 (1008 blks/cyl)


>How-To-Repeat:
It's quite easy to reproduce, just launch a detar of anything, ports.tar.gz for instance, and wait for crash. When write caching is disabled, it takes longer to crash. It could even begin some compilation. But as the load increase, it freeze as well.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted: