I decided that tonight was the time to upgrade my home router from OpenBSD 5.2/amd64. I performed a new install of 5.7/amd64. During the install, a DHCP lease could not be obtained on em0 from my ISP. On first boot it gave me "No acceptable DHCPOFFERS received." I flashed the latest BIOS and received the same error on boot.
This computer has a Supermicro X7SPA-HF mainboard (an Intel Atom CPU with two onboard Intel gigabit NICs). In addition to the dhclient problem, I've also noticed that the onboard Matrox G200 video no longer works with X. No idea if these problems are related. None of the 5.7 errata appear to be applicable, but I'll patch them up tomorrow just in case. I thought that I had better post this tonight, because I'm essentially at the end of my rope. Thanks, dmesg follows: OpenBSD 5.7 (GENERIC.MP) #881: Sun Mar 8 11:04:17 MDT 2015 dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP real mem = 2130182144 (2031MB) avail mem = 2069618688 (1973MB) mpath0 at root scsibus0 at mpath0: 256 targets mainbus0 at root bios0 at mainbus0: SMBIOS rev. 2.6 @ 0x9f000 (19 entries) bios0: vendor American Megatrends Inc. version "1.2b" date 07/19/13 bios0: Supermicro X7SPA-HF acpi0 at bios0: rev 2 acpi0: sleep states S0 S1 S4 S5 acpi0: tables DSDT FACP APIC MCFG OEMB HPET EINJ BERT ERST HEST acpi0: wakeup devices P0P1(S4) PS2K(S4) PS2M(S4) USB0(S4) USB1(S4) USB2(S4) USB5(S4) EUSB(S4) USB3(S4) USB4(S4) USB6(S4) USBE(S4) P0P4(S4) P0P5(S4) P0P6(S4) P0P7(S4) [...] acpitimer0 at acpi0: 3579545 Hz, 24 bits acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat cpu0 at mainbus0: apid 0 (boot processor) cpu0: Intel(R) Atom(TM) CPU D510 @ 1.66GHz, 1666.91 MHz cpu0: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUS H,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,DTES64,MWAIT,DS-CPL,TM2,SSSE3, CX16,xTPR,PDCM,MOVBE,NXE,LONG,LAHF,PERF cpu0: 512KB 64b/line 8-way L2 cache cpu0: smt 0, core 0, package 0 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=0.1.0.0.0, IBE cpu1 at mainbus0: apid 2 (application processor) cpu1: Intel(R) Atom(TM) CPU D510 @ 1.66GHz, 1666.67 MHz cpu1: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUS H,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,DTES64,MWAIT,DS-CPL,TM2,SSSE3, CX16,xTPR,PDCM,MOVBE,NXE,LONG,LAHF,PERF cpu1: 512KB 64b/line 8-way L2 cache cpu1: smt 0, core 1, package 0 cpu2 at mainbus0: apid 1 (application processor) cpu2: Intel(R) Atom(TM) CPU D510 @ 1.66GHz, 1666.67 MHz cpu2: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUS H,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,DTES64,MWAIT,DS-CPL,TM2,SSSE3, CX16,xTPR,PDCM,MOVBE,NXE,LONG,LAHF,PERF cpu2: 512KB 64b/line 8-way L2 cache cpu2: smt 1, core 0, package 0 cpu3 at mainbus0: apid 3 (application processor) cpu3: Intel(R) Atom(TM) CPU D510 @ 1.66GHz, 1666.67 MHz cpu3: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUS H,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,DTES64,MWAIT,DS-CPL,TM2,SSSE3, CX16,xTPR,PDCM,MOVBE,NXE,LONG,LAHF,PERF cpu3: 512KB 64b/line 8-way L2 cache cpu3: smt 1, core 1, package 0 ioapic0 at mainbus0: apid 4 pa 0xfec00000, version 20, 24 pins ioapic0: misconfigured as apic 1, remapped to apid 4 acpimcfg0 at acpi0 addr 0xe0000000, bus 0-255 acpihpet0 at acpi0: 14318179 Hz acpiprt0 at acpi0: bus 0 (PCI0) acpiprt1 at acpi0: bus 4 (P0P1) acpiprt2 at acpi0: bus 1 (P0P4) acpiprt3 at acpi0: bus 2 (P0P8) acpiprt4 at acpi0: bus 3 (P0P9) acpicpu0 at acpi0 acpicpu1 at acpi0 acpicpu2 at acpi0 acpicpu3 at acpi0 acpibtn0 at acpi0: SLPB acpibtn1 at acpi0: PWRB ipmi at mainbus0 not configured pci0 at mainbus0 bus 0 pchb0 at pci0 dev 0 function 0 "Intel Pineview DMI" rev 0x02 uhci0 at pci0 dev 26 function 0 "Intel 82801I USB" rev 0x02: apic 4 int 16 uhci1 at pci0 dev 26 function 1 "Intel 82801I USB" rev 0x02: apic 4 int 21 uhci2 at pci0 dev 26 function 2 "Intel 82801I USB" rev 0x02: apic 4 int 19 ehci0 at pci0 dev 26 function 7 "Intel 82801I USB" rev 0x02: apic 4 int 18 usb0 at ehci0: USB revision 2.0 uhub0 at usb0 "Intel EHCI root hub" rev 2.00/1.00 addr 1 ppb0 at pci0 dev 28 function 0 "Intel 82801I PCIE" rev 0x02: msi pci1 at ppb0 bus 1 ppb1 at pci0 dev 28 function 4 "Intel 82801I PCIE" rev 0x02: msi pci2 at ppb1 bus 2 em0 at pci2 dev 0 function 0 "Intel 82574L" rev 0x00: msi, address 00:25:90:0a:3d:fc ppb2 at pci0 dev 28 function 5 "Intel 82801I PCIE" rev 0x02: msi pci3 at ppb2 bus 3 em1 at pci3 dev 0 function 0 "Intel 82574L" rev 0x00: msi, address 00:25:90:0a:3d:fd uhci3 at pci0 dev 29 function 0 "Intel 82801I USB" rev 0x02: apic 4 int 23 uhci4 at pci0 dev 29 function 1 "Intel 82801I USB" rev 0x02: apic 4 int 19 uhci5 at pci0 dev 29 function 2 "Intel 82801I USB" rev 0x02: apic 4 int 18 ehci1 at pci0 dev 29 function 7 "Intel 82801I USB" rev 0x02: apic 4 int 23 usb1 at ehci1: USB revision 2.0 uhub1 at usb1 "Intel EHCI root hub" rev 2.00/1.00 addr 1 ppb3 at pci0 dev 30 function 0 "Intel 82801BA Hub-to-PCI" rev 0x92 pci4 at ppb3 bus 4 vga1 at pci4 dev 4 function 0 "Matrox MGA G200eW" rev 0x0a wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation) wsdisplay0: screen 1-5 added (80x25, vt100 emulation) pcib0 at pci0 dev 31 function 0 "Intel 82801IR LPC" rev 0x02 ahci0 at pci0 dev 31 function 2 "Intel 82801I AHCI" rev 0x02: msi, AHCI 1.2 scsibus1 at ahci0: 32 targets sd0 at scsibus1 targ 0 lun 0: <ATA, ST3200822AS, 3.01> SCSI3 0/direct fixed t10.ATA_ST3200822AS_4LJ06C5G sd0: 190782MB, 512 bytes/sector, 390721968 sectors sd1 at scsibus1 targ 1 lun 0: <ATA, ST3200822AS, 3.01> SCSI3 0/direct fixed t10.ATA_ST3200822AS_4LJ05Z4Z sd1: 190782MB, 512 bytes/sector, 390721968 sectors ichiic0 at pci0 dev 31 function 3 "Intel 82801I SMBus" rev 0x02: apic 4 int 18 iic0 at ichiic0 lm1 at iic0 addr 0x2d: W83627DHG spdmem0 at iic0 addr 0x50: 1GB DDR2 SDRAM non-parity PC2-5300CL5 SO-DIMM spdmem1 at iic0 addr 0x51: 1GB DDR2 SDRAM non-parity PC2-5300CL5 SO-DIMM usb2 at uhci0: USB revision 1.0 uhub2 at usb2 "Intel UHCI root hub" rev 1.00/1.00 addr 1 usb3 at uhci1: USB revision 1.0 uhub3 at usb3 "Intel UHCI root hub" rev 1.00/1.00 addr 1 usb4 at uhci2: USB revision 1.0 uhub4 at usb4 "Intel UHCI root hub" rev 1.00/1.00 addr 1 usb5 at uhci3: USB revision 1.0 uhub5 at usb5 "Intel UHCI root hub" rev 1.00/1.00 addr 1 usb6 at uhci4: USB revision 1.0 uhub6 at usb6 "Intel UHCI root hub" rev 1.00/1.00 addr 1 usb7 at uhci5: USB revision 1.0 uhub7 at usb7 "Intel UHCI root hub" rev 1.00/1.00 addr 1 isa0 at pcib0 isadma0 at isa0 com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo 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, using wsdisplay0 pcppi0 at isa0 port 0x61 spkr0 at pcppi0 wbsio0 at isa0 port 0x2e/2: W83627DHG rev 0x25 lm2 at wbsio0 port 0xca0/8: W83627DHG lm1: disabling sensors due to alias with lm2 uhidev0 at uhub4 port 2 configuration 1 interface 0 "Winbond Electronics Corp Hermon USB hidmouse Device" rev 1.10/0.01 addr 2 uhidev0: iclass 3/1 ums0 at uhidev0: 3 buttons, Z dir wsmouse0 at ums0 mux 0 uhidev1 at uhub4 port 2 configuration 1 interface 1 "Winbond Electronics Corp Hermon USB hidmouse Device" rev 1.10/0.01 addr 2 uhidev1: iclass 3/1 ukbd0 at uhidev1: 8 variable keys, 6 key codes wskbd1 at ukbd0 mux 1 wskbd1: connecting to wsdisplay0 uhidev2 at uhub7 port 1 configuration 1 interface 0 "HP HP Wireless Mini Keyboard" rev 2.00/0.15 addr 2 uhidev2: iclass 3/1, 2 report ids ukbd1 at uhidev2 reportid 1: 8 variable keys, 6 key codes wskbd2 at ukbd1 mux 1 wskbd2: connecting to wsdisplay0 uhid0 at uhidev2 reportid 2: input=3, output=0, feature=0 uhidev3 at uhub7 port 1 configuration 1 interface 1 "HP HP Wireless Mini Keyboard" rev 2.00/0.15 addr 2 uhidev3: iclass 3/1, 3 report ids ums1 at uhidev3 reportid 1 ums1: mouse has no X report ums2 at uhidev3 reportid 2: 0 button wsmouse1 at ums2 mux 0 uhid1 at uhidev3 reportid 3: input=1, output=0, feature=0 vscsi0 at root scsibus2 at vscsi0: 256 targets softraid0 at root scsibus3 at softraid0: 256 targets sd2 at scsibus3 targ 1 lun 0: <OPENBSD, SR RAID 1, 005> SCSI2 0/direct fixed sd2: 190779MB, 512 bytes/sector, 390716273 sectors root on sd2a (e119f073d06815a3.a) swap on sd2b dump on sd2b