Supermicro X7DBR-8+ hang at boot

[John Baldwin]

On Tuesday 23 January 2007 01:17:57 pm Guy Helmer wrote:
> Jack Vogel wrote:
> > On 1/23/07, Guy Helmer <ghelmer at palisadesys.com> wrote:
> >> Using FreeBSD 6.2, I'm having trouble with the Supermicro X7DBR-8+
> >> motherboard (dual Xeon 5130 CPUs on the Blackford chipset -
> >> http://www.supermicro.com/products/motherboard/Xeon1333/5000P/X7DBR-8+.cfm) 
> >>
> >> hanging after printing the "Waiting 5 seconds for SCSI devices to
> >> settle" message.  The hang doesn't always happen - sometimes we have to
> >> go through several reboot cycles for it to happen - but sometimes it
> >> happens with every reboot.  For those who would suggest that this
> >> happens because I'm using Seagate drives, it happens even if we totally
> >> remove the SCSI drive (but leave the aic7902 SCSI interfaces enabled)
> >> and boot from a SATA disk.  Using FreeBSD 6.1, the Intel gigabit
> >> ethernet NICs aren't found but the hang doesn't occur.
> > ...
> > If that isnt it, I would suggest installing using ACPI disabled or 
> > SAFE if
> > needed, and then tweak the kernel after.
> hint.apic.0.disabled=1 helped - it hasn't hung yet in several boot 
> cycles.  New dmesg is attached below in case it helps anyone see a 
> better fix than disabling the APICs.

So you got an interrupt storm on IRQ 18 when ahd0 tried to probe and ahd0 got
interrupt timeouts.  This indicates that ahd0 really lives on IRQ 18, not IRQ
30.  Your BIOS is likely busted since ACPI hardcodes these sort of IRQs.

You can override the BIOS by doing:

set hw.pci5.2.INTA.irq=18

in the loader (or adding a line to loader.conf) and seeing if that fixes the
boot with APIC enabled.

-- 
John Baldwin