x86_64 boot problem

[Peter J. Stieber]

> >>>>I have the following HW that I am hoping to use in a compute cluster.
> >>>>
> >>>>MB: Tyan Tomcat K8S(S2850G2N)
> >>>>RAM: 1GB - DDR 2700 via 2 - 512MB modules
> >>>>CPU: AMD Opteron 146
> >>>>Video: Built in ATI Rage
> >>>>HD: Maxtor 80GB 7200 RPM IDE ULTRA ATA133
> >>>>
> >>>>I have successfully loaded the i386 version Fedora Core 1 using a boot
> >>>>floppy, a network floppy and an http shared mirror of the fedora
> >>>>distribution.
> >>>>
> >>>>Now I am trying to install the x86_64 version using an ATAPI DVD drive
I
> >>>>have temporarily connected to the secondary IDE on the system. When I
> >>>>boot from CDROM I get
> >>>>
> >>>>boot:
> >>>>Loading vmlinux
> >>>>Loading initrd.img............
> >>>>Ready.
>
> >>>   Try "linux apci=off iommu=off".
>
> >> Same result.
> >> Thanks for trying.
>
> > You might also try playing with the iommu, and acpi settings in the
> > bios.  Of I could be completely on the wrong track.  I've only used the
> > 2881, and 2882 tyan amd64 boards.
>
> I have a 2885 I will be firing up eventually too. Thanks for the
suggestion
> and help. I'll report on the results.
>
> Pete

I disabled on board serial ATA support. No change.
The BIOS IOMMU mode was disabled.
Next I disabled ACPI Aware O/S and I got a little further. kernel panic.
I tried
1. just hitting return
2. linux noapci
3. linux apci=off
4. linux apci=off iommu=off
but all gave the kernel panic.
I guess I need to do the serial port trick suggested here
http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=109641
and report the results to bugzilla?

Pete