My 6.2-STABLE box panics on boot trying to initialize acpi_hpet0. The problem is "divide by zero" exception and takes place in dev/acpica/acpi_hpet.c in acpi_hpet_attach. HPET_OFFSET_PERIOD register is zero and there is no check for it. I've added this check for my system, though I'm not sure it's the best solution. dmesg is attached in case it might be useful. -- Sincerely, Oleksandr Tymoshenko PBXpress Communications, Inc. http://www.pbxpress.com Tel./Fax.: +1 866 SIP PBX1 Ext. 656 -------------- next part -------------- Copyright (c) 1992-2007 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD is a registered trademark of The FreeBSD Foundation. FreeBSD 6.2-STABLE #3: Wed May 30 11:04:17 UTC 2007 root@wooster.pbxpress.com:/usr/obj/usr/src/sys/WOOSTER WARNING: WITNESS option enabled, expect reduced performance. ACPI APIC Table: <PTLTD APIC > Timecounter "i8254" frequency 1193182 Hz quality 0 CPU: AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ (2009.16-MHz K8-class CPU) Origin = "AuthenticAMD" Id = 0x40fb2 Stepping = 2 Features=0x178bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2,HTT> Features2=0x2001<SSE3,CX16> AMD Features=0xea500800<SYSCALL,NX,MMX+,FFXSR,RDTSCP,LM,3DNow!+,3DNow!> AMD Features2=0x1f<LAHF,CMP,SVM,ExtAPIC,CR8> Cores per package: 2 real memory = 1039204352 (991 MB) avail memory = 992591872 (946 MB) FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs cpu0 (BSP): APIC ID: 0 cpu1 (AP): APIC ID: 1 MADT: Forcing active-low polarity and level trigger for SCI ioapic0 <Version 1.1> irqs 0-23 on motherboard kbd1 at kbdmux0 acpi0: <PTLTD RSDT> on motherboard acpi0: Power Button (fixed) Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000 acpi_timer0: <24-bit timer at 3.579545MHz> port 0x1008-0x100b on acpi0 cpu0: <ACPI CPU> on acpi0 cpu1: <ACPI CPU> on acpi0 acpi_button0: <Power Button> on acpi0 pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0 pci0: <ACPI PCI bus> on pcib0 pci0: <memory, RAM> at device 0.0 (no driver attached) pci0: <memory, RAM> at device 0.1 (no driver attached) pci0: <memory, RAM> at device 0.2 (no driver attached) pci0: <memory, RAM> at device 0.3 (no driver attached) pci0: <memory, RAM> at device 0.4 (no driver attached) pci0: <memory, RAM> at device 0.5 (no driver attached) pci0: <memory, RAM> at device 0.6 (no driver attached) pci0: <memory, RAM> at device 0.7 (no driver attached) pcib1: <ACPI PCI-PCI bridge> at device 2.0 on pci0 pci1: <ACPI PCI bus> on pcib1 pcib2: <ACPI PCI-PCI bridge> at device 3.0 on pci0 pci2: <ACPI PCI bus> on pcib2 pci0: <display, VGA> at device 5.0 (no driver attached) pci0: <memory, RAM> at device 9.0 (no driver attached) isab0: <PCI-ISA bridge> port 0x8800-0x887f at device 10.0 on pci0 isa0: <ISA bus> on isab0 pci0: <serial bus, SMBus> at device 10.1 (no driver attached) ohci0: <OHCI (generic) USB controller> mem 0xf2204000-0xf2204fff irq 18 at device 11.0 on pci0 ohci0: [GIANT-LOCKED] usb0: OHCI version 1.0, legacy support usb0: SMM does not respond, resetting usb0: <OHCI (generic) USB controller> on ohci0 usb0: USB revision 1.0 uhub0: nVidia OHCI root hub, class 9/0, rev 1.00/1.00, addr 1 uhub0: 8 ports with 8 removable, self powered ehci0: <EHCI (generic) USB 2.0 controller> mem 0xf2208000-0xf22080ff irq 19 at device 11.1 on pci0 ehci0: [GIANT-LOCKED] usb1: EHCI version 1.0 usb1: companion controller, 8 ports each: usb0 usb1: <EHCI (generic) USB 2.0 controller> on ehci0 usb1: USB revision 2.0 uhub1: nVidia EHCI root hub, class 9/0, rev 2.00/1.00, addr 1 uhub1: 8 ports with 8 removable, self powered atapci0: <nVidia nForce MCP51 UDMA133 controller> port 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0x8c00-0x8c0f at device 13.0 on pci0 ata0: <ATA channel 0> on atapci0 ata1: <ATA channel 1> on atapci0 atapci1: <nVidia nForce MCP51 SATA300 controller> port 0x8c40-0x8c47,0x8c34-0x8c37,0x8c38-0x8c3f,0x8c30-0x8c33,0x8c10-0x8c1f mem 0xf2205000-0xf2205fff irq 20 at device 14.0 on pci0 ata2: <ATA channel 0> on atapci1 ata3: <ATA channel 1> on atapci1 atapci2: <nVidia nForce MCP51 SATA300 controller> port 0x8c58-0x8c5f,0x8c4c-0x8c4f,0x8c50-0x8c57,0x8c48-0x8c4b,0x8c20-0x8c2f mem 0xf2206000-0xf2206fff irq 21 at device 15.0 on pci0 ata4: <ATA channel 0> on atapci2 ata5: <ATA channel 1> on atapci2 pcib3: <ACPI PCI-PCI bridge> at device 16.0 on pci0 pci4: <ACPI PCI bus> on pcib3 pci0: <multimedia> at device 16.1 (no driver attached) nve0: <NVIDIA nForce MCP13 Networking Adapter> port 0x8c60-0x8c67 mem 0xf2207000-0xf2207fff irq 23 at device 20.0 on pci0 nve0: Ethernet address 00:30:05:a7:bc:30 miibus0: <MII bus> on nve0 rgephy0: <RTL8169S/8110S media interface> on miibus0 rgephy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-FDX, auto nve0: Ethernet address: 00:30:05:a7:bc:30 acpi_hpet0: <High Precision Event Timer> iomem 0x1e0e000-0x1e0efff on acpi0 device_attach: acpi_hpet0 attach returned 22 atkbdc0: <Keyboard controller (i8042)> port 0x60,0x64 irq 1 on acpi0 atkbd0: <AT Keyboard> irq 1 on atkbdc0 kbd0 at atkbd0 atkbd0: [GIANT-LOCKED] sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0 sio0: type 16550A acpi_hpet0: <High Precision Event Timer> iomem 0x1e0e000-0x1e0efff on acpi0 device_attach: acpi_hpet0 attach returned 12 orm0: <ISA Option ROM> at iomem 0xcf000-0xcffff on isa0 sc0: <System console> at flags 0x100 on isa0 sc0: VGA <16 virtual consoles, flags=0x300> vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0 sio1: configured irq 3 not in bitmap of probed irqs 0 sio1: port may not be enabled ukbd0: CHESEN USB Keyboard, rev 1.10/1.10, addr 2, iclass 3/1 kbd2 at ukbd0 uhid0: CHESEN USB Keyboard, rev 1.10/1.10, addr 2, iclass 3/1 Timecounters tick every 1.000 msec acd0: DVDROM <HL-DT-STDVD-ROM GDR8164B/0L06> at ata0-master UDMA33 ad4: 76319MB <WDC WD800JD-00MSA1 10.01E01> at ata2-master SATA300 SMP: AP CPU #1 Launched! Trying to mount root from ufs:/dev/ad4s1a