I have a Linksys card (as dc0) in a server here that first generates a
series of TX underrun error messages, followed by one "using store and
forward" message.

Last night, while building a release, the server crashed. By crashed I
mean won't respond to keyboard or pingable from any external source. The
screen is a dull grey.

This same hardware unit used to live as a linux box and it would regularly
crash whenever a high volume of data was being transfered through that
nic. Last night was the first crash I've seen seen I switched it to
OpenBSD 3, but the symptoms were shockingly familiar.

And, having written that, I have to admit that I have shockingly little to
go on in guessing that the Linksys nic is to blame...just a hunch I guess.
No core dumps, no revealing log messages, nothing besides coming home to a
dead box.

So. This may be a real shot in the dark. Would I gain anything by forcing
that nic to half duplex? Would I be better off getting rid of the linksys
nic entirely? I can swap it out with an Intel, but I have to do it
_quick_ because my partner in all things will be home soon and I don't
want her to find the guts of her computer strewn across the office
floor...

Dmesg to follow...

OpenBSD 3.0 (GENERIC) #94: Thu Oct 18 14:48:27 MDT 2001
    deraadti386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: F00F bug workaround installed
cpu0: Intel Pentium (P54C) ("GenuineIntel" 586-class) 100 MHz
cpu0: FPU,V86,DE,PSE,TSC,MSR,MCE,CX8
real mem = 66695168 (65132K)
avail mem = 56520704 (55196K)
using 839 buffers containing 3436544 bytes (3356K) of memory
mainbus0 (root)
bios0 at mainbus0: AT/286+(ff) BIOS, date 01/01/94, BIOS32 rev. 0 0xf0210
apm0 at bios0: Power Management spec V1.1
apm0: AC on, battery charge unknown
pcibios0 at bios0: rev. 2.1 0xf0200/0x900
pcibios0: pcibios_get_intr_routing - function not supported
pcibios0: PCI IRQ Routing information unavailable.
pcibios0: PCI bus #0 is the last bus
bios0: ROM list: 0xc0000/0x8000 0xc8000/0x2600
pci0 at mainbus0 bus 0: configuration mode 1 (bios)
pchb0 at pci0 dev 0 function 0 "Acer Labs M1451 Host-PCI" rev 0xbd
"Acer Labs M1449 PCI-ISA" rev 0xc0 at pci0 dev 2 function 0 not configured
pciide0 at pci0 dev 3 function 0 "CMD Technology PCI0640" rev 0x02: no DMA, channel 0 wired to compatibility, channel 1 wired to compatibility
pciide0: channel 1 ignored (disabled)
vga1 at pci0 dev 4 function 0 "Cirrus Logic CL-GD5430" rev 0x47
wsdisplay0 at vga1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
dc0 at pci0 dev 14 function 0 "Lite-On PNIC-II" rev 0x25: irq 9 address 00:a0:cc:34:74:7c
dcphy0 at dc0 phy 31: internal PHY
pciide1 at pci0 dev 15 function 0 "CMD Technology PCI0648" rev 0x01: DMA, channel 0 configured to native-PCI, channel 1 configured to native-PCI
pciide1: using irq 5 for native-PCI interrupt
wd0 at pciide1 channel 0 drive 0: <WDC WD136AA>
wd0: 16-sector PIO, LBA, 12971MB, 16383 cyl, 16 head, 63 sec, 26564832 sectors
atapiscsi0 at pciide1 channel 0 drive 1
scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 0 lun 0: <MITSUMI, CD-ROM !B, B06> SCSI0 5/cdrom removable
wd0(pciide1:0:0): using PIO mode 4, Ultra-DMA mode 4
cd0(pciide1:0:1): using PIO mode 3
isa0 at mainbus0
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
ep0 at isa0 port 0x300/16 irq 3: address 00:a0:24:16:85:c9, utp (default utp)
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
sysbeep0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
npx0 at isa0 port 0xf0/16: using exception 16
pccom1: irq 3 already in use
fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
biomask 4060 netmask 4268 ttymask 42ea
pctr: 586-class performance counters and user-level cycle counter enabled
dkcsum: wd0 matched BIOS disk 80
root on wd0a
rootdev=0x0 rrootdev=0x300 rawdev=0x302
WARNING: / was not properly unmounted
dc0: TX underrun -- increasing TX threshold
dc0: TX underrun -- increasing TX threshold
dc0: TX underrun -- increasing TX threshold
dc0: TX underrun -- using store and forward mode

Many thanks in advance,

Jeff

Jeff Ross
Open Vistas Networking, Inc.
http://www.openvistas.net

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