Hi Tony,

This is the board:

http://www.asus.com/products/mb/socket478/p4s533-mx/overview.htm

I'm using a 3.06GHz P4 Intel HT socket 478 CPU.

I ran this board under SL3 (and acpi on) for months using HT without one 
hint of a problem. Booting in UP mode shows no issues, booting in SMP mode 
(without the acpi=off kernel parameter) hangs it everytime.

Michael.

> Hi Michael;
> 
>    Can you give some more details on what mainboard you are using. 
>  This can't be happening on a lot of boards as the FC3 bugzilla 
> report is a couple of months old and has no follow up activity 
> except for your comment on RHEL4 doing the same thing.  Our Dell 
> 2650 (which were somewhat notorious for adaptec raid issues with 
> RHEL3) seems fine with RHEL4.  It has two HT Xeons.
> 
> Tony Hoffmann | Tel/Tél: (250) 493-2277 | Fax: (250) 493-7767
> [log in to unmask] <mailto:[log in to unmask]>
> National Research Council Canada | P.O. Box 248, Penticton BC V2A 6J9
> Conseil national de recherches Canada | B.P. 248, Penticton (C.-B.)
>  V2A 6J9 Government of Canada | Gouvernement du Canada
> 
> -----Original Message-----
> From: [log in to unmask]
> [mailto:[log in to unmask]]On Behalf Of
> Michael Mansour
> Sent: Monday, April 25, 2005 2:34 PM
> To: [log in to unmask]
> Subject: Installing SL40 on Hyperthreading CPU
> 
> Hi,
> 
> Most of yesterday I spent time installing SL.40.042005.i386 onto a 
> couple of my rack systems. One of them uses a Hyperthreading CPU 
> which I've used under HT mode without issues under SL3.
> 
> However SL40 (aka the vendors newer kernel) has major issues running 
> in HT mode (UP mode works fine), and just has a hard lock-up during 
> the boot process, where the only thing that can be done is to press 
> the power off button.
> 
> I've tracked this down to a bugzilla filed for FC3:
> 
> https://bugzilla.redhat.com/bugzilla-old/show_bug.cgi?id=146921
> 
> where I get _exactly_ the same issue this guy reported. I disable 
> the various services where the hard lock-up occurs, and it gets past 
> them but then on the login prompt, after entering the username and 
> password the prompt just sits there and you can't login.
> 
> After alot of trouble-shooting on this problem, I tracked it down to 
> the ACPI support, once I put in:
> 
> acpi=off
> 
> into the kernel grub command line, the system booted and runs fine 
> in HT mode. From that bugzilla report, it doesn't look like anything 
> has been fixed with that bug yet.
> 
> On a side note, I also experienced that "kernel openafs anaconda" 
> problem when burning those ISO's above and installing them onto my 
> rack servers (the error reported by another guy earlier in this list)
> . The way I got round that problem was to do a vanilla "server" 
> install on selection menu (without specifying the packages I wanted 
> and didn't want), and SL40 installed, I then went back into the 
> packages and selected/deselected what I wanted.
> 
> Do I need to download the new ISO's (042505) and re-install these 
> newly built machines with these ISO's? or is the ISO set I have fine?
> 
> Michael.
------- End of Original Message -------