Thanks Robert, I have logged the U-Boot and this is what I get. 

Anything to indicate the sd card is not working?

Net:   <ethaddr> not set. Validating first E-fuse MAC
w, usb_ether
Hit any key to stop autoboot:      0 
gpio: pin 53 (gpio 53) value is 1
Card did not respond to voltage select!
mmc0(part 0) is current device
mmc1(part 0) is current device
gpio: pin 54 (gpio 54) value is 1
SD/MMC found on device 1
reading uEnv.txt
1231 bytes read in 6 ms (200.2 KiB/s)
Importing environment from mmc ...
gpio: preading zImage
/s)
reading initrd.img
0 MiB/s)
reading /dtbs/am335x-boneblack.dtb
lattened Device Tree blob at 815f0000
Booting using the fdt blob at 0x815f0000
Using D[    0.000000] Booting Linux on physical CPU 0x Linux version 
3.8.13-bone40 (root@imx6q-sabrelite-1gb-0) (gcc version P Fri Jan 31 
10:36:05 UTC 2014
[    0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), 
cr=50c5387d
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasins14080 
r8192 d14592 u36864
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  
Total pages: 129792
[    0.000000] Kernel command line: console=ttyO0,115200n8 
root=UUID=e7af0f94-0db6-44cf-a6d8-c1658d45e898 ro rootfstype=ext4 rootwait 
fixrtc ip=
[    0.000000] PID hash table entries: 2048 (order: 1, 8192 bytes)
[    0.000000] Dentry cacheghmem
[    0.000000] Virtual kernel memory layout:
[    0.000000]     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
[    0.000000]     fixmap  : 0xfff00000 - 0xfffe0000   ( 896 c0000000   (   
2 MB)
[    0.000000]     modul.000000] OMAP clocksource: GPTIMER2 at 24000000 Hz
[    0.000000] Console: colour dummy device 80x30
[    0.000240] Calibrating delay loop... 993.47 BogoMIPS (lpj=969728)
[    0.029181] pid_max: default: 32768 minimum: 301
[    0.029324] Security Framework initialized
[    0.029382] Mount-cache hash table entries: 512
[    0.035391] Initializing cgroup subsys cpuacct
[    0.035416] Initializing cgroup subsys memory
[    0.035457] Initializing cgroup subsys blkio
[    0.035546] CPU: Testing write buffer coherency: ok
[    0.0y map for 0x8042d2c8 - 0x8042d314
[    0.036935] Brought up 1 CPUs
[    0.036951] SMP: Trl subsystem
[    0.096024] rstctl core: inil-single 44e10800.pinmux: 142 pins at pa 
f9e10 exists
[    0.103537] platform 49000000.edmMAP GPIO hardware version 0.1
[    0.106938]pported.
[    0.111413] cpsw.0: No hwaddr in dt. Using c8:a0:30:b2:c4:2d from efuse
[   ma-dma-engine edma-dma-engine.0: TI EDMA DMA    0.135705] LDO1: at 1800 
mV 
[    0.136507ying to unpack rootfs image as initramfs...
[    0.369788] Freeing initrd memory: 2844K
[    0.370116] hw perfevents: enabled with ARMv7 Cortex-A8 PMU driver, 5 
counters available
[    0.370445] CPU PMU: attempt to register multiple PMU devices!
[    0.370473] arm-pmion 7.20)
[    0.535356] Btrfs loaded
[   .537249] Block layer SCSI generic (bsg) driver version 0.4 loaded 
(major 249)
[    0.5372537299] io scheduler cfq registered (default)
[    0.538516] tps65217-bl tps65217-bl: no p7-bl: probe of tps65217-bl 
failed with error -22
[    0.539059] Serial: 8250/16550 driver    1.769760] bone-capemgr 
bone_capemgr.9: slot #4: #2 overlays
[    1.776351] boncapemgr.9: loader: done slot-4 BB-BONE-EMMC-2G:00A0 (prio 
1)
[    1.791874] bone-capemgr live tree
[    1.811931] musb-hdrc: version 6.0, ?dma?, otg (peripheral+host)
[    1e.0: allocated channel for 0:2
[    2.182605] mmc.11 supply vmmc_aux not found, using dummy regulator
[    2.189238] omap_hsmmc m[    2.222197] pinctrl-single 44e10800.pinmux: 
pin 44e10854 already requested by 44e10800.pinmux; cannot claim for 
gpio-leds.8
[    2.233889] pinctrl-single 44red to indicate activity on CPUs
[    2.2
[    2.279304] omap-aes 53500000.aes: OMAP AES hw accel rev: 3.2
[    2.285516] edma-dma-engine edma-dma-engine.0: [    2.302961] usbcore: 
registered newlog 'log_radio'
[    2.332762] logger: created 256K log 'log_system'
gistered
[    2.369017] VFP support v0.3: implementor 41 architecture 3 part 30 
variant c rev 3
[    2.377108] ThumbEE CPU extension supported.
[    2.381593] Registering SWP/SWPB emulation handler
[    2.386700] mmc1: BKOPS_EN bit is not set
[    2.391cblk0: mmc1:0001 MMC02G 1.78 GiB 
[    2.421933] mmcblk0boot0: mmc1:0001 MMC02G partition 1 1.00 MiB
[    2.428382] mmcblk0boot1: mmc1:0001 MMC02G partition585]  mmcblk0: p1 p2
[[    2.529095] tilcdc 4830e0reported connected with modes
[    2.555070[    2.570116] Console: switching to colour frame buffer 
device 128x48
[    2.582317] tilcdc 4830e000.fb: fb0:  frame buffer device
[    2.587958] tilcdc 4830e000.fb: registered panic notif[    2.647714] 
davinci_mdio 4a101000.mdio: davinci mdio revision 1.6
[    2.654094] davinci_mdio 4a101000.mdio: detected phy mask fffffffe
io: phy[0]: device 4a101000.mdio:00, driver SMSC LAN8710/LAN8720
[    2.681275] Detected MACID = c8:a0:30:b2:c4:2d
[    2.685880]: setting system clock to 2000-01-01 00:00:00Scannk0p2): 
INFO: recovery required on readonly filesystem
[    3.757330] EXT4-fs (mmcblk0p2): write access will be enabled during 
recovery
[    4.271311] EXT4-fs (mmcblk0p2): recovery complete
[    4.280171] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data 
mode. Opts: (null)

Begin: Running /scripts/local-bottom ..

[    5.226951] init: ureadahead main proces[   12.457957] libphy: 
PHirectories...        [80G
 
 [74G[ OK ]

 *   Autostarting VPN 'boat'        Starting very sm
 [74G[ [31mRELOAD cannot be preloaded: ignored.

  [33m* [39;49m Not starting motion daemon, disabled via /etc/default/motion

Ubuntu 13.10 arm ttyO0
The IP Address for usb0 is: 192.168.7.2
arm login:


On Thursday, 7 August 2014 23:52:20 UTC+9:30, RobertCNelson wrote:

>
> You could troubleshoot this pretty quickly with a usb-serial 
> converter. u-boot is pretty focal about what's going on with the boot 
> process. 
>
> Regards, 
>
> -- 
> Robert Nelson 
> http://www.rcn-ee.com/ 
>

-- 
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