misc/91121: kernel divide by zero on boot with ATI IXP400 UMDA controller

[Trent George]

>Number:         91121
>Category:       misc
>Synopsis:       kernel divide by zero on boot with ATI IXP400 UMDA controller
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Dec 31 07:50:03 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Trent George
>Release:        6.0-Stable
>Organization:
none
>Environment:
FreeBSD 6.0-STABLE FreeBSD 6.0-STABLE #0: Fri Dec 30
 :/usr/obj/usr/src/sys/SMP1 i386
>Description:
When trying to boot after install with 6.0 or 7.0 the kernel panics with a divide by zero on a ATI IXP400 UMDA Controller (new ATI chipset for AMD)

when booting the same drive off a differnt intel 865 motherboard, all is fine.
when booting the same drive off a Promise TX 100 on the bad MB, all is fine .

I think the fast processor AMD 3800+ X2 may be effecting a timing calculation for this specific controller code ?

Trent

PS: Hello Soren.
>How-To-Repeat:

Boot up problem machine with 6.0 or 7.0 installed on HD off onboard Controller.
Boot will not complete.
>Fix:

booting the same drive off a differnt intel 865 motherboard, all is fine.
booting the same drive off a Promise TX 100 on the bad MB, all is fine .
              
>Release-Note:
>Audit-Trail:
>Unformatted: