I have a NetBSD/i386 machine running vanilla 1.3.2, plus lots of packages.
It is connected (via crossover cable) to a Pipeline-50 which is my ISDN link
to work. About every other week, something mysteriously fumbles the connection
and I see the following:

Aug 21 17:51:57 uni /netbsd: de0: link down: cable problem?
Aug 21 17:52:08 uni /netbsd: de0: autosense failed: cable problem?

(Those dates are wrong because I used 'rdate -a' a little too much and my
clock appears to be warped; I haven't gotten around to fixing that just yet.)

After those messages, the Pipeline-50 flails for a minute and then closes
down its ISDN connection. After that I can hit a key and it wakes up,
re-connecting as if it had simply been power-cycled, and everything seems
to be fine after that. Until it happens again, that is.

Far as I can tell, I never lose any data, it's just denial of service for
a couple minutes. Relevant dmesg follows.

Todd Whitesel
toddpw @ best.com
-----------------

Copyright (c) 1996, 1997, 1998
    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 1.3.2 (UNI) #0: Mon Aug 10 07:24:33 PDT 1998
    root@uni:/usr/src/sys/arch/i386/compile/UNI
cpu0: family 6 model 1 step 2
cpu0: Intel Pentium Pro (686-class)
real mem  = 75100160
avail mem = 72249344
using 942 buffers containing 3858432 bytes of memory
mainbus0 (root)
pci0 at mainbus0 bus 0: configuration mode 1
pchb0 at pci0 dev 0 function 0
pchb0: Intel 82441FX PCI and Memory Controller (PMC) (rev. 0x02)
pcib0 at pci0 dev 7 function 0
pcib0: Intel 82371SB PCI-to-ISA Bridge (PIIX3) (rev. 0x01)
Intel 82371SB IDE Interface (PIIX3) (IDE mass storage, interface 0x80) at pci0 dev 7 function 1 not configured
de0 at pci0 dev 8 function 0
de0: interrupting at irq 15
de0: DEC DE500-AA 21140A [10-100Mb/s] pass 2.0
de0: address 00:00:f8:1f:0b:92
ahc0 at pci0 dev 9 function 0
ahc0: interrupting at irq 9
ahc0: Using left over BIOS settings
ahc0: aic7880 Wide Channel, SCSI Id=7, 16 SCBs
scsibus0 at ahc0 channel 0: 16 targets
ahc0: target 0 using 16Bit transfers
ahc0: target 0 synchronous at 10.0MHz, offset = 0x8
sd0 at scsibus0 targ 0 lun 0: <IBM, DCAS-32160W, S61A> SCSI2 0/direct fixed
sd0: 2063MB, 8188 cyl, 3 head, 172 sec, 512 bytes/sect x 4226725 sectors
ahc0: target 1 using 16Bit transfers
ahc0: target 1 synchronous at 10.0MHz, offset = 0x8
sd1 at scsibus0 targ 1 lun 0: <SEAGATE, ST34371W, 0484> SCSI2 0/direct fixed
sd1: 4148MB, 5172 cyl, 10 head, 164 sec, 512 bytes/sect x 8496884 sectors
ahc0: target 3 synchronous at 10.0MHz, offset = 0xf
cd0 at scsibus0 targ 3 lun 0: <PLEXTOR, CD-ROM PX-32TS, 1.02> SCSI2 5/cdrom removable
sd2 at scsibus0 targ 5 lun 0: <IOMEGA, ZIP 100, E.11> SCSI2 0/direct removable
sd2: drive offline
ahc1 at pci0 dev 10 function 0
ahc1: interrupting at irq 11
ahc1: aic7850 Single Channel, SCSI Id=7, 3 SCBs
ahc1: Host Adapter Bios disabled.  Using default SCSI device parameters
scsibus1 at ahc1 channel 0: 8 targets
Matrox product 0x051b (VGA display) at pci0 dev 12 function 0 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
lpt0 at isa0 port 0x378-0x37b irq 7
npx0 at isa0 port 0xf0-0xff: using exception 16
pc0 at isa0 port 0x60-0x6f irq 1: color
pms0 at pc0 irq 12
spkr0 at pc0 port 0x61
pc0: console
fdc0 at isa0 port 0x3f0-0x3f7 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB, 80 cyl, 2 head, 18 sec
isapnp0 at isa0 port 0x279: read port 0x203
sb0 at isapnp0 port 0x220/16,0x330/2,0x388/4 irq 5 drq 1,5
sb0: Creative SB16 PnP Audio: dsp v4.13
audio0 at sb0
isapnp0: <Creative SB16 PnP, CTL2011, PNP0600, IDE> port 0x168/8,0x36e/2 irq 10 not configured
isapnp0: <Creative SB16 PnP, CTL0051, , StereoEnhance> port 0x100/1 not configured
isapnp0: <Creative SB16 PnP, CTL7001, , Game> port 0x200/8 not configured
biomask a40 netmask 8a40 ttymask 9ac2
findroot: can't open dev sd2a (5)
boot device: sd0
root on sd0a dumps on sd0b
de0: enabling 10baseT port
de0: link down: cable problem?
de0: autosense failed: cable problem?
sd2: no disk label
uid 0 on /tmp: file system full
uid 0 on /tmp: file system full
uid 0 on /tmp: file system full
uid 0 on /tmp: file system full
de0: link down: cable problem?
de0: autosense failed: cable problem?

# eof