Hi *,

i am also experiencing sudden resets (rebootwith without panic/ddb traces).
Right after installing the system it was very stable - after a week of operation
a simple pkgsrc compile triggers a reset. Disabling X didn't improve things.
It "feels" like things are deteriorating.

The board is a ASUS K8V with an AMD Athlon(tm) 64 3000+ CPU. dmesg below.
Some more effects:
	- panic: sbdrop
	- during /etc/rc sh in running state (via ^T) but no progress, no accumulated u/s time (not picked up by scheduler?)
	- savecore in endless (> 2min) loop accumulating sys time after printing savecore: no core

Power-, CPU- oder memory-trouble ?

no traces in dmesg can be found and ddb is not called.

dmesg:
wsdisplay0: screen 3 added (80x25, vt100 emulation)
wsdisplay0: screen 4 added (80x25, vt100 emulation)
wsdisplay0: screen 5 added (80x25, vt100 emulation)
wsdisplay0: screen 6 added (80x25, vt100 emulation)
wsdisplay0: screen 7 added (80x25, vt100 emulation)
NetBSD 2.0C (ORCUS) #0: Fri Apr 16 15:19:17 CEST 2004
        kardel@Orcus:/usr/src/sys/arch/amd64/compile/ORCUS
total memory = 1022 MB
avail memory = 980 MB
mainbus0 (root)
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: AMD Athlon(tm) 64 Processor 3000+, 2002.69 MHz
cpu0: features: e7dbfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR>
cpu0: features: e7dbfbff<PGE,MCA,CMOV,PAT,PSE36,MPC,NOX,MMXX,MMX>
cpu0: features: e7dbfbff<FXSR,SSE,SSE2,LONG,3DNOW2,3DNOW>
cpu0: I-cache 64 KB 64b/line 2-way, D-cache 64 KB 64b/line 2-way
cpu0: L2 cache 512 KB 64b/line 16-way
cpu0: ITLB 32 4 KB entries fully associative, 8 4 MB entries fully associative
cpu0: DTLB 32 4 KB entries fully associative, 8 4 MB entries fully associative
cpu0: calibrating local timer
cpu0: apic clock running at 200 MHz
cpu0: 8 page colors
ioapic0 at mainbus0 apid 1 (I/O APIC)
ioapic0: pa 0xfec00000, version 3, 24 pins
ioapic0: misconfigured as apic 2
ioapic0: remapped to apic 1
acpi0 at mainbus0
acpi0: using Intel ACPI CA subsystem version 20040211
acpi0: X/RSDT: OemId <A M I ,OEMXSDT ,01000428>, AslId <MSFT,00000097>
acpi0: SCI interrupting at int 9
acpi0: fixed-feature power button present
ACPI Object Type 'Processor' (0x0c) at acpi0 not configured
acpi: activated PNP0C0F
acpi: activated PNP0C0F
acpi: activated PNP0C0F
acpi: activated PNP0C0F
PNP0A03 [PCI Bus] at acpi0 not configured
PNP0000 [AT Interrupt Controller] at acpi0 not configured
PNP0200 [AT DMA Controller] at acpi0 not configured
PNP0100 [AT Timer] at acpi0 not configured
PNP0B00 [AT Real-Time Clock] at acpi0 not configured
pckbc0 at acpi0 (PNP0303): kbd port
pckbc0: io 0x60,0x64 irq 1
pckbc1 at acpi0 (PNP0F03): aux port
pckbc1: irq 12
PNP0800 [AT-style speaker sound] at acpi0 not configured
PNP0C04 [Math Coprocessor] at acpi0 not configured
fdc0 at acpi0 (PNP0700)
fdc0: io 0x3f0-0x3f5,0x3f7 irq 6 drq 2
fdc0: expected BUFFER, got 4
lpt0 at acpi0 (PNP0400-1)
lpt0: io 0x378-0x37f irq 7
PNP0C02 [Plug and Play motherboard register resources] at acpi0 not configured
PNP0C02 [Plug and Play motherboard register resources] at acpi0 not configured
com0 at acpi0 (PNP0501-1)
com0: io 0x3f8-0x3ff irq 4
com0: ns16550a, working fifo
PNP0C01 [System Board] at acpi0 not configured
acpibut0 at acpi0 (PNP0C0C-170): ACPI Power Button
PNP0C0F [PCI interrupt link device] at acpi0 not configured
PNP0C0F [PCI interrupt link device] at acpi0 not configured
PNP0C0F [PCI interrupt link device] at acpi0 not configured
PNP0C0F [PCI interrupt link device] at acpi0 not configured
PNP0C0F [PCI interrupt link device] at acpi0 not configured
PNP0C0F [PCI interrupt link device] at acpi0 not configured
PNP0C0F [PCI interrupt link device] at acpi0 not configured
PNP0C0F [PCI interrupt link device] at acpi0 not configured
acpibut1 at acpi0 (PNP0C0E): ACPI Sleep Button
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard
pms0 at pckbc0 (aux slot)
pckbc0: using irq 12 for aux slot
wsmouse0 at pms0 mux 0
pci0 at mainbus0 bus 0: configuration mode 1
pci0: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
pchb0 at pci0 dev 0 function 0
pchb0: VIA Technologies product 0x3188 (rev. 0x01)
ppb0 at pci0 dev 1 function 0: VIA Technologies product 0xb188 (rev. 0x00)
pci1 at ppb0 bus 1
pci1: i/o space, memory space enabled
vga0 at pci1 dev 0 function 0: ATI Technologies Radeon 9200SE (rev. 0x01)
wsdisplay0 at vga0 kbdmux 1: console (80x25, vt100 emulation), using wskbd0
wsmux1: connecting to wsdisplay0
ATI Technologies product 0x5d44 (miscellaneous display, revision 0x01) at pci1 dev 0 function 1 not configured
Promise Technology PDC20376 SATA/150 IDE controller (RAID mass storage, revision 0x02) at pci0 dev 8 function 0 not configured
skc0 at pci0 dev 10 function 0: ioapic0 pin 17 (irq 10)
skc0: Yukon Gigabit Ethernet 10/100/1000Base-T Adapter
sk0 at skc0 port A: Ethernet address 00:0e:a6:80:43:55
makphy0 at sk0 phy 0: Marvell 88E1011 Gigabit PHY, rev. 5
makphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-FDX, auto
ex0 at pci0 dev 12 function 0: 3Com 3c905C-TX 10/100 Ethernet with mngmt (rev. 0x78)
ex0: interrupting at ioapic0 pin 17 (irq 10)
ex0: MAC address 00:0a:5e:06:2c:68
exphy0 at ex0 phy 24: 3Com internal media interface
exphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
pdcide0 at pci0 dev 13 function 0
pdcide0: Promise Ultra133/ATA Bus Master IDE Accelerator (rev. 0x02)
pdcide0: bus-master DMA support present
pdcide0: primary channel configured to native-PCI mode
pdcide0: using ioapic0 pin 18 (irq 5) for native-PCI interrupt
atabus0 at pdcide0 channel 0
pdcide0: secondary channel configured to native-PCI mode
atabus1 at pdcide0 channel 1
ex1 at pci0 dev 14 function 0: 3Com 3c905C-TX 10/100 Ethernet with mngmt (rev. 0x78)
ex1: interrupting at ioapic0 pin 19 (irq 3)
ex1: MAC address 00:0a:5e:06:2c:62
exphy1 at ex1 phy 24: 3Com internal media interface
exphy1: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
viaide0 at pci0 dev 15 function 0
viaide0: VIA Technologies VT8237 SATA Controller (rev. 0x80)
viaide0: bus-master DMA support present
viaide0: primary channel wired to native-PCI mode
viaide0: using ioapic0 pin 20 (irq 10) for native-PCI interrupt
atabus2 at viaide0 channel 0
viaide0: secondary channel wired to native-PCI mode
atabus3 at viaide0 channel 1
viaide1 at pci0 dev 15 function 1
viaide1: VIA Technologies VT8237 ATA133 controller
viaide1: bus-master DMA support present
viaide1: primary channel configured to compatibility mode
viaide1: primary channel interrupting at ioapic0 pin 14 (irq 14)
atabus4 at viaide1 channel 0
viaide1: secondary channel configured to compatibility mode
viaide1: secondary channel interrupting at ioapic0 pin 15 (irq 15)
atabus5 at viaide1 channel 1
uhci0 at pci0 dev 16 function 0: VIA Technologies VT83C572 USB Controller (rev. 0x81)
uhci0: interrupting at ioapic0 pin 21 (irq 11)
usb0 at uhci0: USB revision 1.0
uhub0 at usb0
uhub0: VIA Technologies UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
uhci1 at pci0 dev 16 function 1: VIA Technologies VT83C572 USB Controller (rev. 0x81)
uhci1: interrupting at ioapic0 pin 21 (irq 11)
usb1 at uhci1: USB revision 1.0
uhub1 at usb1
uhub1: VIA Technologies UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
uhci2 at pci0 dev 16 function 2: VIA Technologies VT83C572 USB Controller (rev. 0x81)
uhci2: interrupting at ioapic0 pin 21 (irq 10)
usb2 at uhci2: USB revision 1.0
uhub2 at usb2
uhub2: VIA Technologies UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub2: 2 ports with 2 removable, self powered
uhci3 at pci0 dev 16 function 3: VIA Technologies VT83C572 USB Controller (rev. 0x81)
uhci3: interrupting at ioapic0 pin 21 (irq 10)
usb3 at uhci3: USB revision 1.0
uhub3 at usb3
uhub3: VIA Technologies UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub3: 2 ports with 2 removable, self powered
VIA Technologies VT8237 EHCI USB Controller (USB serial bus, interface 0x20, revision 0x86) at pci0 dev 16 function 4 not configured
pcib0 at pci0 dev 17 function 0
pcib0: VIA Technologies VT8237 (Apollo KT600) PCI-ISA Bridge (rev. 0x00)
auvia0 at pci0 dev 17 function 5: VIA Technologies VT8235 AC'97 Audio (rev 0x60)
auvia0: interrupting at ioapic0 pin 22 (irq 5)
auvia0: ac97: Analog Devices AD1980 codec; headphone, 20 bit DAC, no 3D stereo
auvia0: ac97: ext id 3c7<AMAP,LDAC,SDAC,CDAC,SPDIF,DRA,VRA>
audio0 at auvia0: full duplex, mmap, independent
pchb1 at pci0 dev 24 function 0
pchb1: Advanced Micro Devices AMD64 HyperTransport configuration (rev. 0x00)
pchb2 at pci0 dev 24 function 1
pchb2: Advanced Micro Devices AMD64 Address Map configuration (rev. 0x00)
pchb3 at pci0 dev 24 function 2
pchb3: Advanced Micro Devices AMD64 DRAM configuration (rev. 0x00)
pchb4 at pci0 dev 24 function 3
pchb4: Advanced Micro Devices AMD64 Miscellaneous configuration (rev. 0x00)
isa0 at pcib0
pcppi0 at isa0 port 0x61
sysbeep0 at pcppi0
ioapic0: enabling
Kernelized RAIDframe activated
IPsec: Initialized Security Association Processing.
uhub0: port error, restarting port 1
uhub0: port error, restarting port 2
uhub1: port error, restarting port 1
uhub1: port error, restarting port 2
uhub2: port error, restarting port 1
uhub2: port error, giving up port 1
uhub2: port error, restarting port 2
uhub2: port error, giving up port 2
uhub3: port error, restarting port 1
uhub3: port error, giving up port 1
uhub3: port error, restarting port 2
uhub3: port error, giving up port 2
wd0 at atabus0 drive 0: <HDS722525VLAT80>
wd0: drive supports 16-sector PIO transfers, LBA48 addressing
wd0: 186 GB, 387621 cyl, 16 head, 63 sec, 512 bytes/sect x 390721968 sectors
wd0: 32-bit data port
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
wd0(pdcide0:0:0): using PIO mode 4, Ultra-DMA mode 5 (Ultra/100) (using DMA data transfers)
wd1 at atabus1 drive 0: <HDS722525VLAT80>
wd1: drive supports 16-sector PIO transfers, LBA48 addressing
wd1: 186 GB, 387621 cyl, 16 head, 63 sec, 512 bytes/sect x 390721968 sectors
wd1: 32-bit data port
wd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
wd1(pdcide0:1:0): using PIO mode 4, Ultra-DMA mode 5 (Ultra/100) (using DMA data transfers)
wd2 at atabus4 drive 0: <HDS722525VLAT80>
wd2: drive supports 16-sector PIO transfers, LBA48 addressing
wd2: 186 GB, 387621 cyl, 16 head, 63 sec, 512 bytes/sect x 390721968 sectors
wd2: 32-bit data port
wd2: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
wd2(viaide1:0:0): using PIO mode 4, Ultra-DMA mode 5 (Ultra/100) (using DMA data transfers)
wd3 at atabus5 drive 0: <HDS722525VLAT80>
wd3: drive supports 16-sector PIO transfers, LBA48 addressing
wd3: 186 GB, 387621 cyl, 16 head, 63 sec, 512 bytes/sect x 390721968 sectors
wd3: 32-bit data port
wd3: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
wd3(viaide1:1:0): using PIO mode 4, Ultra-DMA mode 5 (Ultra/100) (using DMA data transfers)
boot device: wd0
root on wd0a dumps on wd0b
root file system type: ffs
raid0: Component /dev/wd0h being configured at col: 0
         Column: 0 Num Columns: 2
         Version: 2 Serial Number: 2004040900 Mod Counter: 258
         Clean: No Status: 0
/dev/wd0h is not clean!
raid0: Component /dev/wd1h being configured at col: 1
         Column: 1 Num Columns: 2
         Version: 2 Serial Number: 2004040900 Mod Counter: 258
         Clean: No Status: 0
/dev/wd1h is not clean!
raid0: RAID Level 1
raid0: Components: /dev/wd0h /dev/wd1h
raid0: Total Sectors: 33558272 (16385 MB)
raid1: Component /dev/wd0i being configured at col: 0
         Column: 0 Num Columns: 2
         Version: 2 Serial Number: 2004040901 Mod Counter: 246
         Clean: No Status: 0
/dev/wd0i is not clean!
raid1: Component /dev/wd1i being configured at col: 1
         Column: 1 Num Columns: 2
         Version: 2 Serial Number: 2004040901 Mod Counter: 246
         Clean: No Status: 0
/dev/wd1i is not clean!
raid1: RAID Level 1
raid1: Components: /dev/wd0i /dev/wd1i
raid1: Total Sectors: 33558272 (16385 MB)
raid2: Component /dev/wd0j being configured at col: 0
         Column: 0 Num Columns: 2
         Version: 2 Serial Number: 2004040902 Mod Counter: 254
         Clean: No Status: 0
/dev/wd0j is not clean!
raid2: Component /dev/wd1j being configured at col: 1
         Column: 1 Num Columns: 2
         Version: 2 Serial Number: 2004040902 Mod Counter: 254
...
raid15: RAID Level 1
raid15: Components: /dev/wd2m /dev/wd3m
raid15: Total Sectors: 51809920 (25297 MB)
wsdisplay0: screen 1 added (80x25, vt100 emulation)
wsdisplay0: screen 2 added (80x25, vt100 emulation)
wsdisplay0: screen 3 added (80x25, vt100 emulation)
wsdisplay0: screen 4 added (80x25, vt100 emulation)
wsdisplay0: screen 5 added (80x25, vt100 emulation)
wsdisplay0: screen 6 added (80x25, vt100 emulation)
wsdisplay0: screen 7 added (80x25, vt100 emulation)


-- 
Frank