Hello, Found an interesting behavior on a Thinkpad T61 running a week old 4.3-current i386 GENERIC. Whenever it boots plugged in to AC, dmesg recognizes SpeedStep and hw.setperf becomes available through sysctl(8). On the other hand, whenever it boots while it's on battery, dmesg doesn't recognize SpeedStep. acpidump is attached. There is even a subtle difference in dmesgs
Here it is: -acpiac0 at acpi0: AC unit online +acpiac0 at acpi0: AC unit offline acpidock at acpi0 not configured bios0: ROM list: 0xc0000/0x10000! 0xd0000/0x1000 0xd1000/0x1000 0xe0000/0x10000! cpu0 at mainbus0 -cpu0: unknown Enhanced SpeedStep CPU, msr 0x06170d2806000d28 -cpu0: using only highest and lowest power states -cpu0: Enhanced SpeedStep 1300 MHz (1340 mV): speeds: 1300, 600 MHz +cpu0: EST: strange msr value 0x06170d2806008811 Here is the dmesg from a laptop that has been booted being plugged in to AC: OpenBSD 4.3-current (GENERIC) #0: Wed Mar 19 19:09:23 PDT 2008 [EMAIL PROTECTED]:/usr/src/sys/arch/i386/compile/GENERIC cpu0: Intel(R) Core(TM)2 Duo CPU T8300 @ 2.40GHz ("GenuineIntel" 686-class) 2.40 GHz cpu0: FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,SSE3,MWAIT,DS-CPL,VMX,EST,TM2,CX16,xTPR real mem = 2103726080 (2006MB) avail mem = 2026082304 (1932MB) mainbus0 at root bios0 at mainbus0: AT/286+ BIOS, date 02/20/08, BIOS32 rev. 0 @ 0xfdc60, SMBIOS rev. 2.4 @ 0xe0010 (73 entries) bios0: vendor LENOVO version "7LETB2WW (2.12 )" date 02/20/2008 bios0: LENOVO 7658CTO acpi0 at bios0: rev 2 acpi0: tables DSDT FACP SSDT ECDT TCPA APIC MCFG HPET SLIC BOOT ASF! SSDT SSDT SSDT SSDT acpi0: wakeup devices LID_(S3) SLPB(S3) LURT(S3) DURT(S3) IGBE(S4) EXP0(S4) EXP1(S4) EXP2(S4) EXP3(S4) EXP4(S4) PCI1(S4) USB0(S3) USB1(S3) USB2(S3) USB3(S3) USB4(S3) EHC0(S3) EHC1(S3) HDEF(S4) acpitimer0 at acpi0: 3579545 Hz, 24 bits acpihpet0 at acpi0: 14318179 Hz acpiprt0 at acpi0: bus 0 (PCI0) acpiprt1 at acpi0: bus -1 (AGP_) acpiprt2 at acpi0: bus 2 (EXP0) acpiprt3 at acpi0: bus 3 (EXP1) acpiprt4 at acpi0: bus 4 (EXP2) acpiprt5 at acpi0: bus 5 (EXP3) acpiprt6 at acpi0: bus 13 (EXP4) acpiprt7 at acpi0: bus 21 (PCI1) acpiec0 at acpi0 acpicpu0 at acpi0: C3, C2 acpitz0 at acpi0: critical temperature 127 degC acpitz1 at acpi0: critical temperature 100 degC acpibtn0 at acpi0: LID_ acpibtn1 at acpi0: SLPB acpibat0 at acpi0: BAT0 model "42T4530" serial 483 type LION oem "SANYO" acpibat1 at acpi0: BAT1 not present acpiac0 at acpi0: AC unit online acpidock at acpi0 not configured bios0: ROM list: 0xc0000/0x10000! 0xd0000/0x1000 0xd1000/0x1000 0xe0000/0x10000! cpu0 at mainbus0 cpu0: unknown Enhanced SpeedStep CPU, msr 0x06170d2806000d28 cpu0: using only highest and lowest power states cpu0: Enhanced SpeedStep 1300 MHz (1340 mV): speeds: 1300, 600 MHz pci0 at mainbus0 bus 0: configuration mode 1 (no bios) pchb0 at pci0 dev 0 function 0 "Intel GM965 Host" rev 0x0c vga1 at pci0 dev 2 function 0 "Intel GM965 Video" rev 0x0c wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation) wsdisplay0: screen 1-5 added (80x25, vt100 emulation) agp0 at vga1: aperture at 0xe0000000, size 0x8000000 "Intel GM965 Video" rev 0x0c at pci0 dev 2 function 1 not configured em0 at pci0 dev 25 function 0 "Intel ICH8 IGP M AMT" rev 0x03: irq 11, address 00:1c:25:76:fa:ea uhci0 at pci0 dev 26 function 0 "Intel 82801H USB" rev 0x03: irq 11 uhci1 at pci0 dev 26 function 1 "Intel 82801H USB" rev 0x03: irq 11 ehci0 at pci0 dev 26 function 7 "Intel 82801H USB" rev 0x03: irq 11 usb0 at ehci0: USB revision 2.0 uhub0 at usb0 "Intel EHCI root hub" rev 2.00/1.00 addr 1 azalia0 at pci0 dev 27 function 0 "Intel 82801H HD Audio" rev 0x03: irq 11 azalia0: RIRB time out azalia0: RIRB time out azalia0: codec[s]: Analog Devices AD1984, Conexant/0x2bfa, using Analog Devices AD1984 audio0 at azalia0 ppb0 at pci0 dev 28 function 0 "Intel 82801H PCIE" rev 0x03: irq 11 pci1 at ppb0 bus 2 ppb1 at pci0 dev 28 function 1 "Intel 82801H PCIE" rev 0x03: irq 11 pci2 at ppb1 bus 3 iwn0 at pci2 dev 0 function 0 "Intel Wireless WiFi Link 4965AGN" rev 0x61: irq 11, MoW1, address 00:1f:3b:03:b1:59 ppb2 at pci0 dev 28 function 2 "Intel 82801H PCIE" rev 0x03: irq 11 pci3 at ppb2 bus 4 ppb3 at pci0 dev 28 function 3 "Intel 82801H PCIE" rev 0x03: irq 11 pci4 at ppb3 bus 5 ppb4 at pci0 dev 28 function 4 "Intel 82801H PCIE" rev 0x03: irq 11 pci5 at ppb4 bus 13 uhci2 at pci0 dev 29 function 0 "Intel 82801H USB" rev 0x03: irq 10 uhci3 at pci0 dev 29 function 1 "Intel 82801H USB" rev 0x03: irq 11 uhci4 at pci0 dev 29 function 2 "Intel 82801H USB" rev 0x03: irq 11 ehci1 at pci0 dev 29 function 7 "Intel 82801H USB" rev 0x03: irq 11 usb1 at ehci1: USB revision 2.0 uhub1 at usb1 "Intel EHCI root hub" rev 2.00/1.00 addr 1 ppb5 at pci0 dev 30 function 0 "Intel 82801BAM Hub-to-PCI" rev 0xf3 pci6 at ppb5 bus 21 cbb0 at pci6 dev 0 function 0 "Ricoh 5C476 CardBus" rev 0xba: irq 10 "Ricoh 5C832 Firewire" rev 0x04 at pci6 dev 0 function 1 not configured cardslot0 at cbb0 slot 0 flags 0 cardbus0 at cardslot0: bus 22 device 0 cacheline 0x0, lattimer 0xb0 pcmcia0 at cardslot0 pcib0 at pci0 dev 31 function 0 "Intel 82801HEM LPC" rev 0x03 pciide0 at pci0 dev 31 function 1 "Intel 82801HBM IDE" rev 0x03: DMA, channel 0 configured to compatibility, channel 1 configured to compatibility atapiscsi0 at pciide0 channel 0 drive 0 scsibus0 at atapiscsi0: 2 targets cd0 at scsibus0 targ 0 lun 0: <MATSHITA, DVD/CDRW UJDA775, CB03> SCSI0 5/cdrom removable cd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2 pciide0: channel 1 ignored (disabled) ahci0 at pci0 dev 31 function 2 "Intel 82801HBM AHCI" rev 0x03: irq 10, AHCI 1.1 scsibus1 at ahci0: 32 targets sd0 at scsibus1 targ 0 lun 0: <ATA, FUJITSU MHW2160B, 0084> SCSI3 0/direct fixed sd0: 152627MB, 19457 cyl, 255 head, 63 sec, 512 bytes/sec, 312581808 sec total ichiic0 at pci0 dev 31 function 3 "Intel 82801H SMBus" rev 0x03: irq 11 iic0 at ichiic0 usb2 at uhci0: USB revision 1.0 uhub2 at usb2 "Intel UHCI root hub" rev 1.00/1.00 addr 1 usb3 at uhci1: USB revision 1.0 uhub3 at usb3 "Intel UHCI root hub" rev 1.00/1.00 addr 1 usb4 at uhci2: USB revision 1.0 uhub4 at usb4 "Intel UHCI root hub" rev 1.00/1.00 addr 1 usb5 at uhci3: USB revision 1.0 uhub5 at usb5 "Intel UHCI root hub" rev 1.00/1.00 addr 1 usb6 at uhci4: USB revision 1.0 uhub6 at usb6 "Intel UHCI root hub" rev 1.00/1.00 addr 1 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> spkr0 at pcppi0 aps0 at isa0 port 0x1600/31 aps0: failed to initialise npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16 biomask edfd netmask edfd ttymask ffff mtrr: Pentium Pro MTRR support softraid0 at root root on sd0a swap on sd0b dump on sd0b [demime 1.01d removed an attachment of type application/gzip which had a name of acpidump.txt.gz]