I'm using NetBSD 1.5 on a Dell OptiPlex GX110, with i810 
video-on-motherboard. I'm using XFree86 4.0.2 with a package I got from this 
list(agppart.o?). Recently, when i "startx", my screen "flashes" once a 
while(it's like a lightening from inside my screen, with a sound,seems the 
hardware is not funcationing well), then i return to text mode, but this 
morning i found the same problem under text mode, i'm scared to death and 
switched to linux &window nt(multiboot system), but all my stuff is really 
on NetBSD, what should i do?

for the screen, i configured the frequency--vertical and horizontal 
correctly, i believe.

save my life...

p.s. DMESG output:
NetBSD 1.5 (XXKERN) #0: Thu May 17 09:39:32 CST 2001
    root@xxiaolab:/usr/src/sys/arch/i386/compile/XXKERN
cpu0: Intel Pentium III (E) (686-class)
total memory = 190 MB
avail memory = 171 MB
using 2461 buffers containing 9844 KB of memory
BIOS32 rev. 0 found at 0xffe90
mainbus0 (root)
pci0 at mainbus0 bus 0: configuration mode 1
pci0: i/o space, memory space enabled
pchb0 at pci0 dev 0 function 0
pchb0: Intel 82810E Memory Controller Hub (rev. 0x03)
vga1 at pci0 dev 1 function 0: Intel 82810E Graphics Controller (rev. 0x03)
wsdisplay0 at vga1: console (80x25, vt100 emulation)
ppb0 at pci0 dev 30 function 0: Intel 82801AA Hub-to-PCI Bridge (rev. 0x02)
pci1 at ppb0 bus 1
pci1: i/o space, memory space enabled
IDT 77201/77211 ATM ("NICStAR") (ATM network, revision 0x03) at pci1 dev 7 
function 0 not configured
ex0 at pci1 dev 12 function 0: 3Com 3c905C-TX 10/100 Ethernet with mngmt 
(rev. 0x78)
ex0: interrupting at irq 5
ex0: MAC address 00:b0:d0:60:b7:1b
ukphy0 at ex0 phy 24: Generic IEEE 802.3u media interface
ukphy0: OUI 0x001018, model 0x0017, rev. 7
ukphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
pcib0 at pci0 dev 31 function 0
pcib0: Intel 82801AA LPC Interface Bridge (rev. 0x02)
pciide0 at pci0 dev 31 function 1: Intel 82801AA IDE Controller (ICH) (rev. 
0x02)
pciide0: bus-master DMA support present
pciide0: primary channel wired to compatibility mode
wd0 at pciide0 channel 0 drive 0: <WDC WD102BB>
wd0: drive supports 16-sector pio transfers, lba addressing
wd0: 9779 MB, 16383 cyl, 16 head, 63 sec, 512 bytes/sect x 20028960 sectors
wd0: 32-bit data port
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5
pciide0: primary channel interrupting at irq 14
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 4 (using DMA data 
transfers)
pciide0: secondary channel wired to compatibility mode
atapibus0 at pciide0 channel 1
cd0 at atapibus0 drive 0: <CRD-8482B, , 1.05> type 5 cdrom removable
cd0: 32-bit data port
cd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 2
pciide0: secondary channel interrupting at irq 15
cd0(pciide0:1:0): using PIO mode 4, Ultra-DMA mode 2 (using DMA data 
transfers)
uhci0 at pci0 dev 31 function 2: Intel 82801AA USB Controller (rev. 0x02)
uhci0: interrupting at irq 11
usb0 at uhci0: USB revision 1.0
uhub0 at usb0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
Intel 82801AA SMBus Controller (SMBus serial bus, revision 0x02) at pci0 dev 
31 function 3 not configured
Intel 82801AA AC-97 Audio Controller (audio multimedia, revision 0x02) at 
pci0 dev 31 function 5 not configured
isa0 at pcib0
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
pmsi0 at pckbc0 (aux slot)
pckbc0: using irq 12 for aux slot
wsmouse0 at pmsi0 mux 0
lpt0 at isa0 port 0x378-0x37b irq 7
pcppi0 at isa0 port 0x61
midi0 at pcppi0: PC speaker
sysbeep0 at pcppi0
isapnp0 at isa0 port 0x279: ISA Plug 'n Play device support
npx0 at isa0 port 0xf0-0xff: using exception 16
fdc0 at isa0 port 0x3f0-0x3f7 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB, 80 cyl, 2 head, 18 sec
isapnp0: no ISA Plug 'n Play devices found
biomask ef45 netmask ef65 ttymask ffe7
boot device: wd0
root on wd0a dumps on wd0b
root file system type: ffs
IP Filter: v3.4.9 initialized.  Default = pass all, Logging = enabled
strip1: not multicast capable, IPv6 not enabled
strip1: not multicast capable, IPv6 not enabled
strip0: not multicast capable, IPv6 not enabled
strip0: not multicast capable, IPv6 not enabled
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)
wsmux1: connecting to wsdisplay0

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