kernel/1552: APM PowerOff on Intel 810 chipset

[Brian Joseph <rys@godsey.net>]

>Number:         1552
>Category:       kernel
>Synopsis:       reboot/halt call to APM Driver fails to shutdown machine.
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Dec  9 20:50:02 MST 2000
>Last-Modified:
>Originator:     Brian Joseph Czapiga
>Organization:
net
>Release:        OPENBSD_2_8
>Environment:
	System      : OpenBSD 2.8
	Architecture: OpenBSD.i386
	Machine     : i386
>Description:
	After issueing halt -p, system reboots. Other, nameless, Non-OpenBSD
	systems running on the same Intel 810 motherboard, have sucessfully
	shutdown the system before. (Feature is present on this chipset).

	dmesg output below is for custom kernel, however, same behavior
	is exhibited while using GENERIC (valid and tested).

	dmesg (partial):

OpenBSD 2.8-stable (WITCHHAVEN) #0: Fri Dec  8 16:37:09 PST 2000
    root@witchhaven:/usr/src/sys/arch/i386/compile/WITCHHAVEN
    cpu0: Intel Pentium III (Coppermine) ("GenuineIntel" 686-class) 731 MHz
    cpu0: FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,SYS,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SIMD
    real mem  = 266711040 (260460K)
    avail mem = 244355072 (238628K)
    using 3281 buffers containing 13438976 bytes (13124K) of memory
    mainbus0 (root)
    bios0 at mainbus0: AT/286+(00) BIOS, date 02/10/00, BIOS32 rev. 0 @ 0xfda74
    apm0 at bios0: Power Management spec V1.2
    apm0: AC on, battery charge unknown
    pcibios0 at bios0: rev. 2.1 found at 0xf0000[0x10000]
    pcibios0: PCI IRQ Routing Table rev. 1.0 found at 0xf31d0, size 192 bytes (10 entries)
    pcibios0: PCI Interrupt Router at 000:31:0 ("Intel 82371FB (Triton) PCI-ISA" rev 0x00)
    pcibios0: PCI bus #1 is the last bus
    pci0 at mainbus0 bus 0: configuration mode 1 (no bios)
    pchb0 at pci0 dev 0 function 0 "Intel 82810E" rev 0x03: rng active, 9Kb/sec

>How-To-Repeat:
	On a Intel 810 chipset motherboard running OpenBSD_2_8
	(Patch branch/tree), Issue: halt -p

>Fix:
	Unknown

>Audit-Trail:
>Unformatted: