Odd hang during boot on RPI2 for 2 days now

Fri Mar 4 14:31:15 UTC 2016

Hello all,

A couple of days ago I rebuilt 11-current for my RPI2.
For some odd and still unexplained reason it started
hanging after it had found the USB keyboard during the
auto-configure. I have tried "svn update" a few times
since the problem started, but apparently there has
been no patch to this. The latest svn version which I
have tried is 296383.
I attach the dmesg.boot from the last known good boot.
It shows the last known properly booting system was
11.0-CURRENT r296310.
I have also marked the place where the boot now hangs
as follows ...

...
kbd1 at ukbd0
***
smsc0: chip 0xec00, rev. 0002
...

Everything before the "***" mark seems to work just fine.
At the mark all progress stops and none of the messages
normally seen after this point are shown.

Has something changed perhaps in a manner which could
cause this hang?

--jau

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KDB: debugger backends: ddb
KDB: current backend: ddb
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FreeBSD 11.0-CURRENT #0 r296310: Wed Mar  2 15:09:21 EET 2016
    jau at sleipnir:/tank/fish/jau/Xcomp/obj/arm.armv6hf/tank/fish/jau/Xcomp/src.head/sys/RPI2 arm
FreeBSD clang version 3.7.1 (tags/RELEASE_371/final 255217) 20151225
VT: init without driver.
sema_sysinit
CPU: Cortex A7 rev 5 (Cortex-A core)
 Supported features: ARM_ISA THUMB2 JAZELLE THUMBEE ARMv4 Security_Ext
 WB enabled LABT branch prediction disabled
LoUU:2 LoC:3 LoUIS:2 
Cache level 1: 
 32KB/64B 4-way data cache WB Read-Alloc Write-Alloc
 32KB/32B 2-way instruction cache Read-Alloc
Cache level 2: 
 512KB/64B 8-way unified cache WB Read-Alloc Write-Alloc
real memory  = 989851648 (943 MB)
avail memory = 956403712 (912 MB)
FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
random: entropy device external interface
kbd0 at kbdmux0
ofwbus0: <Open Firmware Device Tree>
simplebus0: <Flattened device tree simple bus> mem 0x3f000000-0x3fffffff on ofwbus0
bcm28360: <Broadcom bcm2836>
generic_timer0: <ARMv7 Generic Timer> irq 72,73,75,74 on ofwbus0
Timecounter "ARM MPCore Timecounter" frequency 19200000 Hz quality 1000
Event timer "ARM MPCore Eventtimer" frequency 19200000 Hz quality 1000
intc0: <BCM2835 Interrupt Controller> mem 0xb200-0xb3ff on simplebus0
bcmwd0: <BCM2708/2835 Watchdog> mem 0x10001c-0x100027 on simplebus0
gpio0: <BCM2708/2835 GPIO controller> mem 0x200000-0x2000af irq 57,59,58,60 on simplebus0
gpio0: read-only pins: 46,48-53.
gpio0: reserved pins: 48-53.
gpiobus0: <OFW GPIO bus> on gpio0
gpioled0: <GPIO led> at pin 35 on gpiobus0
gpioled1: <GPIO led> at pin 47 on gpiobus0
gpioc0: <GPIO controller> on gpio0
iichb0: <BCM2708/2835 BSC controller> mem 0x205000-0x20501f irq 61 on simplebus0
iicbus0: <OFW I2C bus> on iichb0
iic0: <I2C generic I/O> on iicbus0
iichb1: <BCM2708/2835 BSC controller> mem 0x804000-0x80401f irq 61 on simplebus0
iicbus1: <OFW I2C bus> on iichb1
iic1: <I2C generic I/O> on iicbus1
ds32310: <Maxim DS3231 RTC> at addr 0xd0 on iicbus1
spi0: <BCM2708/2835 SPI controller> mem 0x204000-0x20401f irq 62 on simplebus0
spibus0: <OFW SPI bus> on spi0
bcm_dma0: <BCM2835 DMA Controller> mem 0x7000-0x7fff,0xe05000-0xe05fff irq 24,25,26,27,28,29,30,31,32,33,34,35,36 on simplebus0
mbox0: <BCM2835 VideoCore Mailbox> mem 0xb880-0xb8bf irq 1 on simplebus0
sdhci_bcm0: <Broadcom 2708 SDHCI controller> mem 0x300000-0x3000ff irq 70 on simplebus0
mmc0: <MMC/SD bus> on sdhci_bcm0
uart0: <PrimeCell UART (PL011)> mem 0x201000-0x201fff irq 65 on simplebus0
uart0: console (115200,n,8,1)
vchiq0: <BCM2835 VCHIQ> mem 0xb800-0xb84f irq 2 on simplebus0
vchiq: local ver 8 (min 3), remote ver 8.
pcm0: <VCHIQ audio> on vchiq0
bcm283x_dwcotg0: <DWC OTG 2.0 integrated USB controller (bcm283x)> mem 0x980000-0x99ffff irq 17 on simplebus0
usbus0 on bcm283x_dwcotg0
cpulist0: <Open Firmware CPU Group> on ofwbus0
cpu0: <Open Firmware CPU> on cpulist0
bcm2835_cpufreq0: <CPU Frequency Control> on cpu0
cpu1: <Open Firmware CPU> on cpulist0
cpu2: <Open Firmware CPU> on cpulist0
cpu3: <Open Firmware CPU> on cpulist0
fb0: <BCM2835 VT framebuffer driver> on ofwbus0
fbd0 on fb0
VT: initialize with new VT driver "fb".
fb0: 1600x1200(1600x1200 at 0,0) 24bpp
fb0: fbswap: 1, pitch 4800, base 0x3d2d2000, screen_size 5760000
cryptosoft0: <software crypto>
Timecounters tick every 10.000 msec
IPsec: Initialized Security Association Processing.
usbus0: 480Mbps High Speed USB v2.0
ugen0.1: <DWCOTG> at usbus0
uhub0: <DWCOTG OTG Root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus0
mmcsd0: 64GB <SDHC       0.1 SN D0B50184 MFG 01/2015 by 40 BE> at mmc0 41.6MHz/4bit/65535-block
bcm2835_cpufreq0: ARM 600MHz, Core 250MHz, SDRAM 400MHz, Turbo OFF
Release APs
Trying to mount root from ufs:/dev/mmcsd0s2a []...
uhub0: 1 port with 1 removable, self powered
ugen0.2: <vendor 0x0424> at usbus0
uhub1: <vendor 0x0424 product 0x9514, class 9/0, rev 2.00/2.00, addr 2> on usbus0
uhub1: MTT enabled
uhub1: 5 ports with 4 removable, self powered
random: unblocking device.
ugen0.3: <vendor 0x0424> at usbus0
smsc0: <vendor 0x0424 product 0xec00, rev 2.00/2.00, addr 3> on usbus0
smsc0: chip 0xec00, rev. 0002
miibus0: <MII bus> on smsc0
ukphy0: <Generic IEEE 802.3u media interface> PHY 1 on miibus0
ukphy0:  none, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
ue0: <USB Ethernet> on smsc0
ue0: Ethernet address: b8:27:eb:23:fd:b1
ugen0.4: <Mitsumi Electric> at usbus0
uhub2: <Mitsumi Electric Hub in Apple Extended USB Keyboard, class 9/0, rev 1.10/4.10, addr 4> on usbus0
uhub2: 3 ports with 2 removable, bus powered
ugen0.5: <Mitsumi Electric> at usbus0
ukbd0: <Mitsumi Electric Apple Extended USB Keyboard, class 0/0, rev 1.10/4.10, addr 5> on usbus0
kbd1 at ukbd0
***
smsc0: chip 0xec00, rev. 0002
ue0: link state changed to DOWN
ue0: link state changed to UP
uhid0: <Mitsumi Electric Apple Extended USB Keyboard, class 0/0, rev 1.10/4.10, addr 5> on usbus0