Hi,

I recently built a new machine. Occasionally (meaning a couple of times
a day), the network dies in the following fashion:

First, the system slows down (mouse becomes jerky and unresponsive).
Shortly after, dmesg prints:

Jul 15 20:38:23 cathet re0: watchdog timeout

Once the watchdog timeout message has been printed, the network becomes
inaccessible.

Usually followed by (variants of):

Jul 15 20:40:17 cathet last message repeated 5 times

The system continues being very slow and may even lock up (no response
to mouse, caps lock led doesn't toggle, etc). Either way, I usually
hold down the power button to reset at this point. ifconfig down/up
doesn't stop the timeouts.


OpenBSD 5.8-beta (GENERIC.MP) #1126: Sun Jul  5 18:43:48 MDT 2015
    dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 34283859968 (32695MB)
avail mem = 33240956928 (31701MB)
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.8 @ 0xec2b0 (89 entries)
bios0: vendor American Megatrends Inc. version "2205" date 10/09/2014
bios0: ASUS All Series
acpi0 at bios0: rev 2
acpi0: sleep states S0 S3 S4 S5
acpi0: tables DSDT FACP APIC FPDT SSDT SSDT SSDT MCFG HPET SSDT SSDT
acpi0: wakeup devices PEGP(S4) PEG0(S4) PEGP(S4) PEG1(S4) PEGP(S4) PEG2(S4) 
UAR1(S4) PS2K(S4) PS2M(S4) PXSX(S4) RP01(S4) PXSX(S4) RP02(S4) PXSX(S4) 
RP03(S4) PXSX(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) Core(TM) i5-4590 CPU @ 3.30GHz, 3292.82 MHz
cpu0: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,LONG,LAHF,ABM,PERF,ITSC,FSGSBASE,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM,SENSOR,ARAT
cpu0: 256KB 64b/line 8-way L2 cache
cpu0: smt 0, core 0, package 0
mtrr: Pentium Pro MTRR support, 10 var ranges, 88 fixed ranges
cpu0: apic clock running at 99MHz
cpu0: mwait min=64, max=64, C-substates=0.2.1.2.4, IBE
cpu1 at mainbus0: apid 2 (application processor)
cpu1: Intel(R) Core(TM) i5-4590 CPU @ 3.30GHz, 3292.38 MHz
cpu1: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,LONG,LAHF,ABM,PERF,ITSC,FSGSBASE,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM,SENSOR,ARAT
cpu1: 256KB 64b/line 8-way L2 cache
cpu1: smt 0, core 1, package 0
cpu2 at mainbus0: apid 4 (application processor)
cpu2: Intel(R) Core(TM) i5-4590 CPU @ 3.30GHz, 3292.38 MHz
cpu2: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,LONG,LAHF,ABM,PERF,ITSC,FSGSBASE,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM,SENSOR,ARAT
cpu2: 256KB 64b/line 8-way L2 cache
cpu2: smt 0, core 2, package 0
cpu3 at mainbus0: apid 6 (application processor)
cpu3: Intel(R) Core(TM) i5-4590 CPU @ 3.30GHz, 3292.38 MHz
cpu3: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,LONG,LAHF,ABM,PERF,ITSC,FSGSBASE,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM,SENSOR,ARAT
cpu3: 256KB 64b/line 8-way L2 cache
cpu3: smt 0, core 3, package 0
ioapic0 at mainbus0: apid 8 pa 0xfec00000, version 20, 24 pins
acpimcfg0 at acpi0 addr 0xf8000000, bus 0-63
acpihpet0 at acpi0: 14318179 Hz
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus 1 (PEG0)
acpiprt2 at acpi0: bus -1 (PEG1)
acpiprt3 at acpi0: bus -1 (PEG2)
acpiprt4 at acpi0: bus 2 (RP01)
acpiprt5 at acpi0: bus -1 (RP02)
acpiprt6 at acpi0: bus 3 (RP03)
acpiprt7 at acpi0: bus 4 (RP04)
acpiprt8 at acpi0: bus -1 (RP05)
acpiprt9 at acpi0: bus -1 (RP06)
acpiprt10 at acpi0: bus -1 (RP07)
acpiprt11 at acpi0: bus -1 (RP08)
acpiec0 at acpi0: not present
acpicpu0 at acpi0: C2(200@148 mwait.1@0x33), C1(1000@1 mwait.1), PSS
acpicpu1 at acpi0: C2(200@148 mwait.1@0x33), C1(1000@1 mwait.1), PSS
acpicpu2 at acpi0: C2(200@148 mwait.1@0x33), C1(1000@1 mwait.1), PSS
acpicpu3 at acpi0: C2(200@148 mwait.1@0x33), C1(1000@1 mwait.1), PSS
acpipwrres0 at acpi0: PG00, resource for PEG0
acpipwrres1 at acpi0: PG01, resource for PEG1
acpipwrres2 at acpi0: PG02, resource for PEG2
acpipwrres3 at acpi0: FN00, resource for FAN0
acpipwrres4 at acpi0: FN01, resource for FAN1
acpipwrres5 at acpi0: FN02, resource for FAN2
acpipwrres6 at acpi0: FN03, resource for FAN3
acpipwrres7 at acpi0: FN04, resource for FAN4
acpitz0 at acpi0: critical temperature is 105 degC
acpitz1 at acpi0: critical temperature is 105 degC
acpibat0 at acpi0: BAT0 not present
acpibat1 at acpi0: BAT1 not present
acpibat2 at acpi0: BAT2 not present
acpibtn0 at acpi0: PWRB
acpibtn1 at acpi0: LID0
acpivideo0 at acpi0: GFX0
acpivout0 at acpivideo0: DD1F
cpu0: Enhanced SpeedStep 3292 MHz: speeds: 3301, 3300, 3100, 2900, 2800, 2600, 
2400, 2200, 2000, 1900, 1700, 1500, 1300, 1200, 1000, 800 MHz
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "Intel Core 4G Host" rev 0x06
ppb0 at pci0 dev 1 function 0 "Intel Core 4G PCIE" rev 0x06: msi
pci1 at ppb0 bus 1
radeondrm0 at pci1 dev 0 function 0 "ATI Radeon HD 5450" rev 0x00
drm0 at radeondrm0
radeondrm0: msi
azalia0 at pci1 dev 0 function 1 "ATI Radeon HD 5470 Audio" rev 0x00: msi
azalia0: no supported codecs
xhci0 at pci0 dev 20 function 0 "Intel 9 Series xHCI" rev 0x00: msi
usb0 at xhci0: USB revision 3.0
uhub0 at usb0 "Intel xHCI root hub" rev 3.00/1.00 addr 1
"Intel 9 Series MEI" rev 0x00 at pci0 dev 22 function 0 not configured
ehci0 at pci0 dev 26 function 0 "Intel 9 Series USB" rev 0x00: apic 8 int 20
usb1 at ehci0: USB revision 2.0
uhub1 at usb1 "Intel EHCI root hub" rev 2.00/1.00 addr 1
azalia1 at pci0 dev 27 function 0 "Intel 9 Series HD Audio" rev 0x00: msi
azalia1: codecs: Realtek/0x0887
audio0 at azalia1
ppb1 at pci0 dev 28 function 0 "Intel 9 Series PCIE" rev 0xd0: msi
pci2 at ppb1 bus 2
ppb2 at pci0 dev 28 function 2 "Intel 9 Series PCIE" rev 0xd0: msi
pci3 at ppb2 bus 3
re0 at pci3 dev 0 function 0 "Realtek 8168" rev 0x11: RTL8168G/8111G (0x4c00), 
msi, address 08:62:66:2e:95:0a
rgephy0 at re0 phy 7: RTL8251 PHY, rev. 0
ppb3 at pci0 dev 28 function 3 "Intel 9 Series PCIE" rev 0xd0: msi
pci4 at ppb3 bus 4
vendor "Conexant", unknown product 0x8880 (class multimedia subclass video, rev 
0x04) at pci4 dev 0 function 0 not configured
ehci1 at pci0 dev 29 function 0 "Intel 9 Series USB" rev 0x00: apic 8 int 23
usb2 at ehci1: USB revision 2.0
uhub2 at usb2 "Intel EHCI root hub" rev 2.00/1.00 addr 1
pcib0 at pci0 dev 31 function 0 "Intel H97 LPC" rev 0x00
ahci0 at pci0 dev 31 function 2 "Intel 9 Series AHCI" rev 0x00: msi, AHCI 1.3
ahci0: port 0: 6.0Gb/s
ahci0: port 1: 6.0Gb/s
ahci0: port 2: 6.0Gb/s
ahci0: port 3: 6.0Gb/s
scsibus1 at ahci0: 32 targets
sd0 at scsibus1 targ 0 lun 0: <ATA, Hitachi HDS5C302, ML6O> SCSI3 0/direct 
fixed naa.5000cca369cec8f2
sd0: 1907729MB, 512 bytes/sector, 3907029168 sectors
sd1 at scsibus1 targ 1 lun 0: <ATA, TS64GSSD340, SVN4> SCSI3 0/direct fixed 
naa.5000000000000000
sd1: 61057MB, 512 bytes/sector, 125045424 sectors, thin
sd2 at scsibus1 targ 2 lun 0: <ATA, ST2000VM003-1CT1, SC23> SCSI3 0/direct 
fixed naa.5000c50072de892f
sd2: 1907729MB, 512 bytes/sector, 3907029168 sectors
sd3 at scsibus1 targ 3 lun 0: <ATA, TS64GSSD340, SVN4> SCSI3 0/direct fixed 
naa.5000000000000000
sd3: 61057MB, 512 bytes/sector, 125045424 sectors, thin
ichiic0 at pci0 dev 31 function 3 "Intel 9 Series SMBus" rev 0x00: apic 8 int 18
iic0 at ichiic0
spdmem0 at iic0 addr 0x50: 8GB DDR3 SDRAM PC3-12800
spdmem1 at iic0 addr 0x51: 8GB DDR3 SDRAM PC3-12800
spdmem2 at iic0 addr 0x52: 8GB DDR3 SDRAM PC3-12800
spdmem3 at iic0 addr 0x53: 8GB DDR3 SDRAM PC3-12800
isa0 at pcib0
isadma0 at isa0
com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
pckbc0 at isa0 port 0x60/5 irq 1 irq 12
pckbd0 at pckbc0 (kbd slot)
wskbd0 at pckbd0: console keyboard
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
uhidev0 at uhub0 port 14 configuration 1 interface 0 "Lite-On Technology Corp. 
ThinkPad USB Keyboard with TrackPoint" rev 1.10/1.26 addr 2
uhidev0: iclass 3/1
ukbd0 at uhidev0: 8 variable keys, 6 key codes
wskbd1 at ukbd0 mux 1
uhidev1 at uhub0 port 14 configuration 1 interface 1 "Lite-On Technology Corp. 
ThinkPad USB Keyboard with TrackPoint" rev 1.10/1.26 addr 2
uhidev1: iclass 3/0, 4 report ids
ums0 at uhidev1 reportid 1: 3 buttons
wsmouse0 at ums0 mux 0
uhid0 at uhidev1 reportid 2: input=1, output=0, feature=0
uhid1 at uhidev1 reportid 3: input=3, output=1, feature=0
uhid2 at uhidev1 reportid 4: input=0, output=0, feature=4
uhub3 at uhub1 port 1 "Intel Rate Matching Hub" rev 2.00/0.00 addr 2
uhub4 at uhub2 port 1 "Intel Rate Matching Hub" rev 2.00/0.00 addr 2
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
root on sd1a (8e9ad79095874a2d.a) swap on sd1b dump on sd1b
WARNING: / was not properly unmounted
error: [drm:pid0:drm_edid_block_valid] *ERROR* EDID checksum is invalid, 
remainder is 128
Raw EDID:

ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
error: [drm:pid0:drm_edid_block_valid] *ERROR* EDID checksum is invalid, 
remainder is 128
Raw EDID:

ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
error: [drm:pid0:drm_edid_block_valid] *ERROR* EDID checksum is invalid, 
remainder is 128
Raw EDID:

ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
error: [drm:pid0:drm_edid_block_valid] *ERROR* EDID checksum is invalid, 
remainder is 128
Raw EDID:

ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
drm:pid0:drm_do_get_edid *WARNING* DVI-I-1: Ignoring invalid EDID block 1.
error: [drm:pid0:drm_edid_block_valid] *ERROR* EDID checksum is invalid, 
remainder is 128
Raw EDID:

ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
error: [drm:pid0:drm_edid_block_valid] *ERROR* EDID checksum is invalid, 
remainder is 128
Raw EDID:

ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
error: [drm:pid0:drm_edid_block_valid] *ERROR* EDID checksum is invalid, 
remainder is 128
Raw EDID:

ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
error: [drm:pid0:drm_edid_block_valid] *ERROR* EDID checksum is invalid, 
remainder is 128
Raw EDID:

ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff 
drm:pid0:drm_do_get_edid *WARNING* DVI-I-2: Ignoring invalid EDID block 1.
radeondrm0: 2560x1440
wsdisplay0 at radeondrm0 mux 1: console (std, vt100 emulation), using wskbd0
wskbd1: connecting to wsdisplay0
wsdisplay0: screen 1-5 added (std, vt100 emulation)

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