processor heating in standby (apm -S)

[David Talkington <dtalk@prairienet.org>]

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Strange apm problem with a Dell Inspiron 7500, obsd 3.0, XFree v4;  
using 3Com 575 cardbus NIC.

With X running and only a couple of xterms, no xscreensaver or other
shenanigans, do apm -S.  Hard disk and monitor shut down gracefully.  
After 15-20 minutes of silence, the fan comes on, which is a rarity on
this box.  Investigation reveals quite a lot of heat accumulation near
the processor.  Touch a key, it springs to life; the NIC recovers
fine, and within a few minutes, the unit cools and the fan goes off.

BIOS has a processor speed setting, and I've tried both 'automatic' 
(defined as 'max speed when on AC'), and 'max performance' (defined as 
'start max at boot, let software change speed').  Those sound 
backwards to me, but neither has any effect on this reproducible 
behavior.

Tried capturing 'top -d 1' every 5 seconds to see what's shakin', but
it halts when standby is initiated (as it should), yet the processor
certainly seems to be doing ... something.

'xset dpms force off' won't work, or I'd just use that (all I really
want is a dark screen).

dmesg is attached, if it's of any use.  

Cheers -d

OpenBSD 3.0 (GENERIC) #94: Thu Oct 18 14:48:27 MDT 2001
    deraadt@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: Intel Pentium III (Coppermine) ("GenuineIntel" 686-class) 601 MHz
cpu0: FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,SYS,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SIMD
real mem  = 100184064 (97836K)
avail mem = 87482368 (85432K)
using 1248 buffers containing 5111808 bytes (4992K) of memory
mainbus0 (root)
bios0 at mainbus0: AT/286+(ef) BIOS, date 07/04/00, BIOS32 rev. 0 @ 0xfd890
apm0 at bios0: Power Management spec V1.2
apm0: battery life expectancy 100%
apm0: AC on, battery charge high, estimated 3:20 hours
pcibios0 at bios0: rev. 2.1 @ 0xfd890/0x770
pcibios0: PCI IRQ Routing Table rev. 1.0 @ 0xfdf50/144 (7 entries)
pcibios0: PCI Interrupt Router at 000:07:0 ("Intel 82371FB PCI-ISA" rev 0x00)
pcibios0: PCI bus #3 is the last bus
bios0: ROM list: 0xc0000/0x10000
pci0 at mainbus0 bus 0: configuration mode 1 (no bios)
pchb0 at pci0 dev 0 function 0 "Intel 82443BX PCI-AGP" rev 0x03
ppb0 at pci0 dev 1 function 0 "Intel 82443BX AGP" rev 0x03
pci1 at ppb0 bus 1
vga1 at pci1 dev 0 function 0 "ATI Mobility 1" rev 0x64
wsdisplay0 at vga1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
cbb0 at pci0 dev 4 function 0 "Texas Instruments PCI1225 PCI-CardBus" rev 0x01: irq 11
cbb1 at pci0 dev 4 function 1 "Texas Instruments PCI1225 PCI-CardBus" rev 0x01: irq 11
pcib0 at pci0 dev 7 function 0 "Intel 82371AB PIIX4 ISA" rev 0x02
pciide0 at pci0 dev 7 function 1 "Intel 82371AB IDE" rev 0x01: DMA, channel 0 wired to compatibility, channel 1 wired to compatibility
wd0 at pciide0 channel 0 drive 0: <IBM-DARA-212000>
wd0: 16-sector PIO, LBA, 11513MB, 16383 cyl, 16 head, 63 sec, 23579136 sectors
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2
atapiscsi0 at pciide0 channel 1 drive 0
scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 0 lun 0: <SAMSUNG, CD-ROM SN-124, S003> SCSI0 5/cdrom removable
cd0(pciide0:1:0): using PIO mode 4, Ultra-DMA mode 2
uhci0 at pci0 dev 7 function 2 "Intel 82371AB USB" rev 0x01: irq 5
usb0 at uhci0: USB revision 1.0
uhub0 at usb0
uhub0: vendor 0x0000 UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
"Intel 82371AB Power Mgmt" rev 0x03 at pci0 dev 7 function 3 not configured
maestro0 at pci0 dev 8 function 0 "ESS Maestro 2E" rev 0x10: irq 5
ac97: codec id 0x83847609 (SigmaTel STAC9721/23)
ac97: codec features 18 bit DAC, 18 bit ADC, SigmaTel 3D
audio0 at maestro0
"AT&T/Lucent LTMODEM" rev 0x01 at pci0 dev 16 function 0 not configured
cardslot0 at cbb0 slot 0 flags 0
cardbus0 at cardslot0: bus 2 device 0 cacheline 0x0, lattimer 0x20
pcmcia0 at cardslot0
cardslot1 at cbb1 slot 1 flags 0
cardbus1 at cardslot1: bus 3 device 0 cacheline 0x0, lattimer 0x20
pcmcia1 at cardslot1
isa0 at pcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pms0 at pckbc0 (aux slot)
pckbc0: using irq 12 for aux slot
wsmouse0 at pms0 mux 0
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
sysbeep0 at pcppi0
npx0 at isa0 port 0xf0/16: using exception 16
fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
biomask c860 netmask c860 ttymask d862
pctr: 686-class user-level performance counters enabled
mtrr: Pentium Pro MTRR support
dkcsum: wd0 matched BIOS disk 80
root on wd0a
rootdev=0x0 rrootdev=0x300 rawdev=0x302
xl0 at cardbus0 dev 0 function 0: 3Com 3c575C-TX Ethernet: irq 11 address 00:00:86:5f:10:00
ukphy0 at xl0 phy 0: Generic IEEE 802.3u media interface
ukphy0: OUI 0x00c000, model 0x0000, rev. 0

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