kern/156556: FreeBSD fails to boot on ACER 2920: "bad stray interrupt"

[David Naylor]

>Number:         156556
>Category:       kern
>Synopsis:       FreeBSD fails to boot on ACER 2920: "bad stray interrupt"
>Confidential:   no
>Severity:       critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Apr 21 20:00:21 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     David Naylor
>Release:        FreeBSD-current
>Organization:
Private
>Environment:
FreeBSD dragon.dg 9.0-CURRENT FreeBSD 9.0-CURRENT #0: Wed Apr 13 19:16:40 SAST 2011     root at dragon.dg:/tmp/home/freebsd9/src/sys/DRAGON  amd64
>Description:
uhci0: <Intel 82801H (ICH8) USB controller USB-D> port 0x1820-0x183f irq 20 at 
device 26.0 on pci0
panic: bad stray interrupt
cpuid = 0
<snip/>
db> bt
Trading pid 0 tid 10000
kdb_enter()
intr_event_handle()
intr_execute_handler()
Xapic_isr1()
--- interrupt, rip = 0xffffffff807d904e, rsp = 0xffffffff8108c5e0, rbp = 
0xffffffff8108c680 ---
uma_zalloc_arg()
malloc()
intr_event_add_handler()
intr_add_handler()
pci_setup_intr()
bus_setup_intr()
uhci_pci_attach()
device_attach()
bus_generic_attach()
acpi_pci_attach()
device_attach()
bus_generic_attach()
acpi_pcib_attach()
acpi_pcib_acpi_attach()
device_attach()
bus_generic_attach()
acpi_attach()
device_attach()
bus_generic_attach()
nexus_acpi_attach()
device_attach()
bus_generic_new_pass()
bus_set_pass()
configure()
mi_startup()
btext()

(See http://markmail.org/message/smxnofrdmmkxyvnd for more details)
>How-To-Repeat:
Boot with a GENERIC kernel on an Acer Aspire 2920.  
>Fix:
Revert to a kernel prior to cvsup date=2010.06.20.00.00.00 or specify "hint.hpet.0.allowed_irqs="0x400000"

>Release-Note:
>Audit-Trail:
>Unformatted: