Hello list,

[dmesg and ifconfig output attached inline at bottom]

I upgraded from a mid-July snapshot to a recent one, and I've been
experiencing a strange problem with the network losing
connectivity that I haven't been able to pin down.

What happens is the machine (a Thinkpad T60) will lose all network
connectivity, even to the point where pinging local machines or
the default gateway will produce no response.  

A simple "ifconfig em0 down up" will restore connectivity.  There
are no errors in the dmesg, and "ifconfig em0" shows the interface
as up and running when connectivity is lost.

Fetching email with ports/mail/fdm (I haven't tried any other
MDAs) will usually cause the hang to occur.  Strangely, regular
web browsing doesn't seem to be very likely to cause this.

Does anyone have any idea of things I can do to try to isolate
this?  I've looked through the CVS logs since mid-July and nothing
jumped out at me as being particularly likely to cause this.

Thank you.

-- 
Bryan


OpenBSD 5.6-current (GENERIC.MP) #330: Thu Sep  4 02:53:34 MDT 2014
    t...@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC.MP
cpu0: Genuine Intel(R) CPU T2300 @ 1.66GHz ("GenuineIntel" 686-class) 1.67 GHz
cpu0: 
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,NXE,SSE3,MWAIT,VMX,EST,TM2,xTPR,PDCM,PERF
real mem  = 2682613760 (2558MB)
avail mem = 2626367488 (2504MB)
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: AT/286+ BIOS, date 04/01/10, BIOS32 rev. 0 @ 0xfd6b0, SMBIOS 
rev. 2.4 @ 0xe0010 (68 entries)
bios0: vendor LENOVO version "79ETE6WW (2.26 )" date 04/01/2010
bios0: LENOVO 2623D9U
acpi0 at bios0: rev 2
acpi0: sleep states S0 S3 S4 S5
acpi0: tables DSDT FACP SSDT ECDT TCPA APIC MCFG HPET BOOT SSDT SSDT SSDT SSDT
acpi0: wakeup devices LID_(S3) SLPB(S3) LURT(S3) DURT(S3) EXP0(S4) EXP1(S4) 
EXP2(S4) EXP3(S4) PCI1(S4) USB0(S3) USB1(S3) USB2(S3) USB7(S3) HDEF(S4)
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpiec0 at acpi0
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges
cpu0: apic clock running at 166MHz
cpu0: mwait min=64, max=64, C-substates=0.2.2.2.2, IBE
cpu1 at mainbus0: apid 1 (application processor)
cpu1: Genuine Intel(R) CPU T2300 @ 1.66GHz ("GenuineIntel" 686-class) 1.67 GHz
cpu1: 
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,NXE,SSE3,MWAIT,VMX,EST,TM2,xTPR,PDCM,PERF
ioapic0 at mainbus0: apid 1 pa 0xfec00000, version 20, 24 pins
ioapic0: misconfigured as apic 2, remapped to apid 1
acpimcfg0 at acpi0 addr 0xf0000000, bus 0-63
acpihpet0 at acpi0: 14318179 Hz
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus 1 (AGP_)
acpiprt2 at acpi0: bus 2 (EXP0)
acpiprt3 at acpi0: bus 3 (EXP1)
acpiprt4 at acpi0: bus 4 (EXP2)
acpiprt5 at acpi0: bus 12 (EXP3)
acpiprt6 at acpi0: bus 21 (PCI1)
acpicpu0 at acpi0: C3, C2, C1, PSS
acpicpu1 at acpi0: C3, C2, C1, PSS
acpipwrres0 at acpi0: PUBS, resource for USB0, USB2, USB7
acpitz0 at acpi0: critical temperature is 127 degC
acpitz1 at acpi0: critical temperature is 99 degC
acpibtn0 at acpi0: LID_
acpibtn1 at acpi0: SLPB
acpibat0 at acpi0: BAT0 model "92P1139" serial   659 type LION oem "Panasonic"
acpibat1 at acpi0: BAT1 not present
acpiac0 at acpi0: AC unit online
acpithinkpad0 at acpi0
acpidock0 at acpi0: GDCK docked (15)
bios0: ROM list: 0xc0000/0xfe00 0xd0000/0x1000 0xd1000/0x1000 0xdc000/0x4000! 
0xe0000/0x10000!
cpu0: Enhanced SpeedStep 1663 MHz: speeds: 1667, 1333, 1000 MHz
pci0 at mainbus0 bus 0: configuration mode 1 (bios)
pchb0 at pci0 dev 0 function 0 "Intel 82945GM Host" rev 0x03
ppb0 at pci0 dev 1 function 0 "Intel 82945GM PCIE" rev 0x03: apic 1 int 16
pci1 at ppb0 bus 1
radeondrm0 at pci1 dev 0 function 0 "ATI Radeon Mobility X1300 M52-64" rev 0x00
drm0 at radeondrm0
radeondrm0: apic 1 int 16
azalia0 at pci0 dev 27 function 0 "Intel 82801GB HD Audio" rev 0x02: msi
azalia0: codecs: Analog Devices AD1981HD, Conexant/0x2bfa, using Analog Devices 
AD1981HD
audio0 at azalia0
ppb1 at pci0 dev 28 function 0 "Intel 82801GB PCIE" rev 0x02: apic 1 int 20
pci2 at ppb1 bus 2
em0 at pci2 dev 0 function 0 "Intel 82573L" rev 0x00: msi, address 
00:16:41:52:7e:81
ppb2 at pci0 dev 28 function 1 "Intel 82801GB PCIE" rev 0x02: apic 1 int 21
pci3 at ppb2 bus 3
wpi0 at pci3 dev 0 function 0 "Intel PRO/Wireless 3945ABG" rev 0x02: msi, MoW1, 
address 00:13:02:20:41:18
ppb3 at pci0 dev 28 function 2 "Intel 82801GB PCIE" rev 0x02: apic 1 int 22
pci4 at ppb3 bus 4
ppb4 at pci0 dev 28 function 3 "Intel 82801GB PCIE" rev 0x02: apic 1 int 23
pci5 at ppb4 bus 12
uhci0 at pci0 dev 29 function 0 "Intel 82801GB USB" rev 0x02: apic 1 int 16
uhci1 at pci0 dev 29 function 1 "Intel 82801GB USB" rev 0x02: apic 1 int 17
uhci2 at pci0 dev 29 function 2 "Intel 82801GB USB" rev 0x02: apic 1 int 18
uhci3 at pci0 dev 29 function 3 "Intel 82801GB USB" rev 0x02: apic 1 int 19
ehci0 at pci0 dev 29 function 7 "Intel 82801GB USB" rev 0x02: apic 1 int 19
usb0 at ehci0: USB revision 2.0
uhub0 at usb0 "Intel EHCI root hub" rev 2.00/1.00 addr 1
ppb5 at pci0 dev 30 function 0 "Intel 82801BAM Hub-to-PCI" rev 0xe2
pci6 at ppb5 bus 21
cbb0 at pci6 dev 0 function 0 "TI PCI1510 CardBus" rev 0x00: apic 1 int 16
cardslot0 at cbb0 slot 0 flags 0
cardbus0 at cardslot0: bus 22 device 0 cacheline 0x8, lattimer 0xb0
pcmcia0 at cardslot0
ichpcib0 at pci0 dev 31 function 0 "Intel 82801GBM LPC" rev 0x02: PM disabled
pciide0 at pci0 dev 31 function 1 "Intel 82801GB IDE" rev 0x02: DMA, channel 0 
configured to compatibility, channel 1 configured to compatibility
atapiscsi0 at pciide0 channel 0 drive 0
scsibus1 at atapiscsi0: 2 targets
cd0 at scsibus1 targ 0 lun 0: <HL-DT-ST, DVDRAM GSA-U10N, 1.05> ATAPI 5/cdrom 
removable
cd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2
pciide0: channel 1 ignored (disabled)
ahci0 at pci0 dev 31 function 2 "Intel 82801GBM AHCI" rev 0x02: msi, AHCI 1.1
scsibus2 at ahci0: 32 targets
sd0 at scsibus2 targ 0 lun 0: <ATA, INTEL SSDSC2CW24, 400i> SCSI3 0/direct 
fixed naa.5001517bb2a98d08
sd0: 228936MB, 512 bytes/sector, 468862128 sectors, thin
ichiic0 at pci0 dev 31 function 3 "Intel 82801GB SMBus" rev 0x02: apic 1 int 23
iic0 at ichiic0
usb1 at uhci0: USB revision 1.0
uhub1 at usb1 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb2 at uhci1: USB revision 1.0
uhub2 at usb2 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb3 at uhci2: USB revision 1.0
uhub3 at usb3 "Intel UHCI root hub" rev 1.00/1.00 addr 1
usb4 at uhci3: USB revision 1.0
uhub4 at usb4 "Intel UHCI root hub" rev 1.00/1.00 addr 1
isa0 at ichpcib0
isadma0 at isa0
com1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo
pckbc0 at isa0 port 0x60/5
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
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
aps0 at isa0 port 0x1600/31
npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16
uhub5 at uhub0 port 6 "IBM product 0x4485" rev 2.00/0.01 addr 2
uhidev0 at uhub5 port 2 configuration 1 interface 0 "Logitech USB-PS/2 Optical 
Mouse" rev 2.00/20.00 addr 3
uhidev0: iclass 3/1
ums0 at uhidev0: 3 buttons, Z dir
wsmouse1 at ums0 mux 0
uhidev1 at uhub5 port 3 configuration 1 interface 0 "Gravis GamePad Pro USB" 
rev 1.00/2.00 addr 4
uhidev1: iclass 3/0
uhid0 at uhidev1: input=4, output=0, feature=0
ugen0 at uhub4 port 2 "STMicroelectronics Biometric Coprocessor" rev 1.00/0.01 
addr 2
vscsi0 at root
scsibus3 at vscsi0: 256 targets
softraid0 at root
scsibus4 at softraid0: 256 targets
sd1 at scsibus4 targ 1 lun 0: <OPENBSD, SR CRYPTO, 005> SCSI2 0/direct fixed
sd1: 200595MB, 512 bytes/sector, 410819160 sectors
softraid0: volume sd1 is roaming, it used to be sd2, updating metadata
root on sd1a (bfe3b486511fab55.a) swap on sd1b dump on sd1b
drm: initializing kernel modesetting (RV515 0x1002:0x7149 0x17AA:0x2005).
radeondrm0: VRAM: 128M 0x0000000000000000 - 0x0000000007FFFFFF (64M used)
radeondrm0: GTT: 512M 0x0000000008000000 - 0x0000000027FFFFFF
drm: PCIE GART of 512M enabled (table at 0x0000000000040000).
radeondrm0: 1024x768
wsdisplay0 at radeondrm0 mux 1: console (std, vt100 emulation), using wskbd0
wsdisplay0: screen 1-5 added (std, vt100 emulation)
wpi0: radio is disabled by hardware switch
wpi0: could not initialize hardware
umass0 at uhub5 port 1 configuration 1 interface 0 "Seagate Backup+  Desk" rev 
2.10/3.42 addr 5
umass0: using SCSI over Bulk-Only
scsibus5 at umass0: 2 targets, initiator 0
sd2 at scsibus5 targ 1 lun 0: <Seagate, Backup+ Desk, 0342> SCSI4 0/direct fixed
sd2: 4769307MB, 4096 bytes/sector, 1220942645 sectors


ifconfig em0 output:

em0: flags=28843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,NOINET6> mtu 1500
        lladdr 00:16:41:52:7e:81
        priority: 0
        groups: egress
        media: Ethernet autoselect (100baseTX full-duplex,rxpause,txpause)
        status: active
        inet pub.lic.add.res netmask 0xffffff00 broadcast pub.lic.brd.cst
        inet 192.168.1.7 netmask 0xffffff00 broadcast 192.168.1.255
        inet 10.0.0.14 netmask 0xffffff00 broadcast 10.0.0.255

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