Ubuntu 8.04 problems with some DELL servers

[TJ]

On Sun, 2008-04-20 at 14:09 +0200, Ante Karamatic wrote:
> Some DELL's Perc RAID controllers (confirmed for 3/Di on PowerEdge 1650)
> won't work with Ubuntu 8.04. Since this isn't a bug in the kernel, but
> in DELL's firmware, I didn't report it as a bug. Never the less, I
> wanted to warn you about this.
> 
> I suggest adding to release notes that upgrade of Dell RAID controller's
> firmware is needed before doing upgrade or install. More info at:
> 
> http://bugzilla.kernel.org/show_bug.cgi?id=9133
> 
> Take care...

This can affect other aacraid controllers such as PERC2/QC aka Adaptec
AAC-364 aka HP NetRAID 4M.

There are other causes that make it impossible to boot unless a 2.6.25
patch is included:

See launchpad bug #214814 "BUG: soft lockup - CPU#0 stuck for 61s!"

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/214814/comments/3

This appeared to be an aacraid issue, then firmware, then ACPI then PCI
and finally back to ACPI again!

TJ.