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port-i386/41110: panic on poweroff

        Note: There was a bad value `' for the field `Class'.
        It was set to the default value of `sw-bug'.

>Number:         41110
>Category:       port-i386
>Synopsis:       panic on poweroff
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    port-i386-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Mar 31 15:50:00 +0000 2009
>Originator:     Reinoud Zandijk
>Release:        NetBSD 5.99.7
System: NetBSD 5.99.7 NetBSD 5.99.7 (GENERIC) #13: Fri 
Feb 27 13:14:16 CET 2009
Architecture: i386
Machine: i386


When shutting down the machine with `shutdown -p' :

luiaard# shutdown -p now
Shutdown NOW!
shutdown: [pid 277]
luiaard# wall: You have write permission turned off; no reply possible
*** FINAL System shutdown message from 
System going down IMMEDIATELY                                                  
Mar 31 17:36:09 luiaard shutdown: poweroff by root: 

System shutdown time has arrived

About to run shutdown hooks...
Removing block-type swap devices
Tue Mar 31 17:36:12 CEST 2009

Done running shutdown hooks.
Mar 31 17:36:17 luiaard syslogd[107]: Exiting on signal 15
syncing disks... done
unmounting file systems...
unmounting /bulky (
unmounting /var/mail (
unmounting /home (
unmounting /qemu (
unmounting /usr/sources (
unmounting / ( done
acpi0: entering state 5
panic: cpu_switchto: switching above IPL_SCHED (8)
entering kgdb

The backtrace is:
(gdb) where
#0  0xc0232314 in breakpoint ()
#1  0xc04a67a8 in kgdb_connect (verbose=0) at
#2  0xc04a67f9 in kgdb_panic () at
#3  0xc05f1404 in panic (fmt=0xc0100391 "cpu_switchto: switching above
IPL_SCHED (%d)")
    at ../../../../kern/subr_prf.c:268
#4  0xc010038e in cpu_switchto ()
#5  0xc5f2ec80 in ?? ()
#6  0xc70a5840 in ?? ()
#7  0xc04994bb in mi_switch (l=0xc010038e) at
#8  0xc0495783 in sleepq_block (timo=1, catch=true) at
#9  0xc0473da3 in cv_timedwait_sig (cv=0xc0a4c680, mtx=0xc0a4c68c, timo=1)
    at ../../../../kern/kern_condvar.c:281
#10 0xc010daae in AcpiOsSleep (Milliseconds=15) at
#11 0xc02977b7 in AcpiExSystemDoSuspend (HowLong=15) at
#12 0xc0294626 in AcpiExOpcode_1A_0T_0R (WalkState=0x8)
    at ../../../../dist/acpica/exoparg1.c:272
#13 0xc025eb69 in AcpiDsExecEndOp (WalkState=0xc0ea4c00)
    at ../../../../dist/acpica/dswexec.c:533
#14 0xc0553136 in AcpiPsParseLoop (WalkState=0xc0ea4c00)
    at ../../../../dist/acpica/psloop.c:1189
#15 0xc055348f in AcpiPsParseAml (WalkState=0x0) at
#16 0xc05540af in AcpiPsExecuteMethod (Info=0xc0e6ffe0) at
#17 0xc051c7bb in AcpiNsEvaluate (Info=0xc0e6ffe0) at
#18 0xc051ef94 in AcpiEvaluateObject (Handle=0x0, Pathname=0xc09593a8
    ExternalParams=0xc709bbcc, ReturnBuffer=0x0) at
#19 0xc02e87b5 in AcpiEnterSleepStatePrep (SleepState=5 '\005')
    at ../../../../dist/acpica/hwsleep.c:291
#20 0xc01160b6 in acpi_enter_sleep_state (sc=0xc63609d4, state=5)
    at ../../../../dev/acpi/acpi.c:1316
#21 0xc04b7bbd in cpu_reboot (howto=2056, bootstr=0x0)
    at ../../../../arch/i386/i386/machdep.c:923
#22 0xc04a66a5 in sys_reboot (l=0xc70a5840, uap=0xc709bd08, retval=0xc709bd00)
    at ../../../../kern/kern_xxx.c:78
#23 0xc0606aae in syscall (frame=0xc709bd48) at
#24 0xc010058d in syscall1 ()

issue `shutdown -p' on this machine.
No idea.

 but also on NetBSD 5.99.8 and reported on 5.0_RC*

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