Hi,

I just built a -current amd64 kernel and userland (except XFree) and tried
to start X (xinit) and the system rebooted immediately.  The same happens
with 3.0.1 release kernel and binaries.  I added DDB to my kernel config,
but the system still reboots without entering the debugger.

Is it my graphics card or a generic amd64 problem?

Here's the dmesg output:

Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
The NetBSD Foundation, Inc.  All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California.  All rights reserved.

NetBSD 4.99.1 (LOKKI) #1: Mon Aug 21 15:56:19 EEST 2006
root@lokki:/tmp/nb/obj/sys/arch/amd64/compile/LOKKI
total memory = 4094 MB
avail memory = 3939 MB
timecounter: Timecounters tick every 10.000 msec
timecounter: Timecounter "i8254" frequency 1193182 Hz quality 100
timecounter: selected timecounter "i8254" frequency 1193182 Hz quality 100
mainbus0 (root)
mainbus0: Intel MP Specification (Version 1.4) (OEM00000 PROD00000000)
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Dual Core AMD Opteron(tm) Processor 170, 2009.36 MHz
cpu0: features: f7dbfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR>
cpu0: features: f7dbfbff<PGE,MCA,CMOV,PAT,PSE36,MPC,NOX,MMXX,MMX>
cpu0: features: f7dbfbff<FXSR,SSE,SSE2,HTT,LONG,3DNOW2,3DNOW>
cpu0: I-cache 64 KB 64B/line 2-way, D-cache 64 KB 64B/line 2-way
cpu0: L2 cache 1 MB 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: 16 page colors
cpu1 at mainbus0: apid 1 (application processor)
cpu1: not started
mpbios: bus 0 is type PCI   
mpbios: bus 1 is type PCI   
mpbios: bus 2 is type PCI   
mpbios: bus 3 is type PCI   
mpbios: bus 4 is type PCI   
mpbios: bus 5 is type PCI   
mpbios: bus 6 is type ISA   
ioapic0 at mainbus0 apid 2 (I/O APIC)
ioapic0: pa 0xfec00000, version 11, 24 pins
ioapic0: misconfigured as apic 0
ioapic0: remapped to apic 2
pci0 at mainbus0 bus 0: configuration mode 1
pci0: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
NVIDIA nForce4 Memory Controller (miscellaneous memory, revision 0xa3) at pci0 dev 0 function 0 not configured
pcib0 at pci0 dev 1 function 0
pcib0: NVIDIA product 0x0050 (rev. 0xa3)
NVIDIA nForce4 SMBus (SMBus serial bus, revision 0xa2) at pci0 dev 1 function 1 not configured
ohci0 at pci0 dev 2 function 0: NVIDIA nForce4 USB Host Controller (rev. 0xa2)
ohci0: interrupting at ioapic0 pin 11 (irq 11)
ohci0: OHCI version 1.0, legacy support
usb0 at ohci0: USB revision 1.0
uhub0 at usb0
uhub0: NVIDIA OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 8 ports with 8 removable, self powered
ehci0 at pci0 dev 2 function 1: NVIDIA nForce4 USB2 Host Controller (rev. 0xa3)
ehci0: interrupting at ioapic0 pin 5 (irq 5)
ehci0: BIOS refuses to give up ownership, using force
ehci0: EHCI version 1.0
ehci0: companion controller, 4 ports each: ohci0
usb1 at ehci0: USB revision 2.0
uhub1 at usb1
uhub1: NVIDIA EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
uhub1: 8 ports with 8 removable, self powered
auich0 at pci0 dev 4 function 0: nForce4 AC-97 Audio
auich0: interrupting at ioapic0 pin 10 (irq 10)
auich0: ac97: Avance Logic ALC655 codec; no 3D stereo
auich0: ac97: ext id 9c4<AC97_23,LDAC,SDAC,CDAC,SPDIF>
viaide0 at pci0 dev 6 function 0
viaide0: NVIDIA nForce4 IDE Controller (rev. 0xf2)
viaide0: bus-master DMA support present
viaide0: primary channel configured to compatibility mode
viaide0: primary channel interrupting at ioapic0 pin 14 (irq 14)
atabus0 at viaide0 channel 0
viaide0: secondary channel configured to compatibility mode
viaide0: secondary channel interrupting at ioapic0 pin 15 (irq 15)
atabus1 at viaide0 channel 1
ppb0 at pci0 dev 9 function 0: NVIDIA nForce4 PCI Host Bridge (rev. 0xa2)
pci1 at ppb0 bus 1
pci1: i/o space, memory space enabled
fwohci0 at pci1 dev 6 function 0: VIA Technologies VT6306 IEEE 1394 Host Controller (rev. 0x80)
fwohci0: interrupting at ioapic0 pin 11 (irq 11)
fwohci0: OHCI version 1.10 (ROM=1)
fwohci0: No. of Isochronous channels is 4.
fwohci0: EUI64 00:e0:81:00:00:23:ce:5c
fwohci0: Phy 1394a available S400, 2 ports.
fwohci0: Link S400, max_rec 2048 bytes.
ieee1394if0 at fwohci0: IEEE1394 bus
fwip0 at ieee1394if0: IP over IEEE1394
fwohci0: Initiate bus reset
eap0 at pci1 dev 7 function 0: Ensoniq CT5880 CT5880-C (rev. 0x02)
eap0: interrupting at ioapic0 pin 5 (irq 5)
eap0: ac97: SigmaTel STAC9721/23 codec; 18 bit DAC, 18 bit ADC, SigmaTel 3D
eap0: ac97: ext id 200<AMAP>
audio0 at eap0: full duplex, mmap, independent
midi0 at eap0: AudioPCI MIDI UART
nfe0 at pci0 dev 10 function 0: ioapic0 pin 11 (irq 11), address 00:e0:81:55:90:81
makphy0 at nfe0 phy 1: Marvell 88E1111 Gigabit PHY, rev. 2
makphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-FDX, auto
ppb1 at pci0 dev 11 function 0: NVIDIA nForce4 PCIe Host Bridge (rev. 0xa3)
pci2 at ppb1 bus 2
pci2: i/o space, memory space enabled, rd/line, wr/inv ok
ppb2 at pci0 dev 12 function 0: NVIDIA nForce4 PCIe Host Bridge (rev. 0xa3)
pci3 at ppb2 bus 3
pci3: i/o space, memory space enabled, rd/line, wr/inv ok
ppb3 at pci0 dev 13 function 0: NVIDIA nForce4 PCIe Host Bridge (rev. 0xa3)
pci4 at ppb3 bus 4
pci4: i/o space, memory space enabled, rd/line, wr/inv ok
ppb4 at pci0 dev 14 function 0: NVIDIA nForce4 PCIe Host Bridge (rev. 0xa3)
pci5 at ppb4 bus 5
pci5: i/o space, memory space enabled, rd/line, wr/inv ok
vga0 at pci5 dev 0 function 0: NVIDIA product 0x0141 (rev. 0xa2)
vga0: WARNING: ignoring 64-bit BAR @ 0x14
vga0: WARNING: ignoring 64-bit BAR @ 0x1c
wsdisplay0 at vga0 kbdmux 1: console (80x25, vt100 emulation)
wsmux1: connecting to wsdisplay0
pchb0 at pci0 dev 24 function 0
pchb0: Advanced Micro Devices AMD64 HyperTransport configuration (rev. 0x00)
pchb1 at pci0 dev 24 function 1
pchb1: Advanced Micro Devices AMD64 Address Map configuration (rev. 0x00)
pchb2 at pci0 dev 24 function 2
pchb2: Advanced Micro Devices AMD64 DRAM configuration (rev. 0x00)
pchb3 at pci0 dev 24 function 3
pchb3: Advanced Micro Devices AMD64 Miscellaneous configuration (rev. 0x00)
isa0 at pcib0
lpt0 at isa0 port 0x378-0x37b irq 7
com0 at isa0 port 0x3f8-0x3ff irq 4: ns16550a, working fifo
com1 at isa0 port 0x2f8-0x2ff irq 3: ns16550a, working fifo
pckbc0 at isa0 port 0x60-0x64
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
attimer0 at isa0 port 0x40-0x43: AT Timer
pcppi0 at isa0 port 0x61
midi1 at pcppi0: PC speaker (CPU-intensive output)
sysbeep0 at pcppi0
fdc0 at isa0 port 0x3f0-0x3f7 irq 6 drq 2
pcppi0: attached to attimer0
ioapic0: enabling
timecounter: Timecounter "TSC" frequency 2009359100 Hz quality 800
timecounter: selected timecounter "TSC" frequency 2009359100 Hz quality 800
fwohci0: node_id=0xc800ffc0, gen=1, CYCLEMASTER mode
ieee1394if0: 1 nodes, maxhop <= 0, cable IRM = 0 (me)
ieee1394if0: bus manager 0 (me)
timecounter: Timecounter "clockinterrupt" frequency 100 Hz quality 0
audio1 at auich0: full duplex, independent
Kernelized RAIDframe activated
atapibus0 at atabus0: 2 targets
cd0 at atapibus0 drive 1: <HL-DT-ST DVDRAM GSA-H10N, K15E5JF0546, JL10> cdrom removable
cd0: 32-bit data port
cd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 2 (Ultra/33)
wd0 at atabus0 drive 0: <ST34321A>
wd0: drive supports 32-sector PIO transfers, LBA addressing
wd0: 4103 MB, 8894 cyl, 15 head, 63 sec, 512 bytes/sect x 8404830 sectors
wd0: 32-bit data port
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 2 (Ultra/33)
wd0(viaide0:0:0): using PIO mode 4, Ultra-DMA mode 2 (Ultra/33) (using DMA)
cd0(viaide0:0:1): using PIO mode 4, Ultra-DMA mode 2 (Ultra/33) (using DMA)
boot device: wd0
root on wd0a dumps on wd0b
root file system type: ffs
uhidev0 at uhub0 port 1 configuration 1 interface 0
uhidev0: Logitech Optical USB Mouse, rev 2.00/3.40, addr 2, iclass 3/1
ums0 at uhidev0: 3 buttons and Z dir.
wsmouse0 at ums0 mux 0
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)
 no core dump