Unable to boot or debug Ubuntu linux on beagle board rev. C3

[mkstart]

First of all, I am new in this field,

I am trying to boot linux on Beagle Board Rev. C3 with no success. Steps I took for booting is taken from this wiki https://eewiki.net/display/linuxonarm/BeagleBoard . It is created by Robert Nelson. I can see that U-Boot is started and trying to start Linux kernel, but as control is passed to kernel I stop getting output. It looked like low-level debug is not configured for OMAP3. I tried to recompile and configure kernel. In menuconfig I select Kernel hacking ---> Kernel low-level debugging functions ---> Kernel low-level debugging port and I select "Kernel low-level debugging messages via OMAP3 UART3". I also select Early printk(I am not sure if I need this). After compiling I have no progress. I also connect monitor via hdmi and I see yellow screen only.

Could you please give me some idea?

This is my output:

U-Boot 2016.09-dirty (Nov 02 2016 - 12:23:39 +0100)

OMAP3530-GP ES3.0, CPU-OPP2, L3-165MHz, Max CPU Clock 600 MHz

OMAP3 Beagle board + LPDDR/NAND

I2C:   ready

DRAM:  256 MiB

NAND:  256 MiB

MMC:   OMAP SD/MMC: 0

*** Warning - bad CRC, using default environment

Beagle Rev C1/C2/C3

Timed out in wait_for_event: status=1000

Check if pads/pull-ups of bus are properly configured

No EEPROM on expansion board

Timed out in wait_for_bb: status=1000

No EEPROM on expansion board

OMAP die ID: 3d00000300000000040323090b01e00a

Net:   usb_ether

Error: usb_ether address not set.

Hit any key to stop autoboot:  0 

switch to partitions #0, OK

mmc0 is current device

SD/MMC found on device 0

Checking for: /uEnv.txt ...

Checking for: /boot/uEnv.txt ...

23 bytes read in 11 ms (2 KiB/s)

Loaded environment from /boot/uEnv.txt

Checking if uname_r is set in /boot/uEnv.txt...

Running uname_boot ...

loading /boot/vmlinuz-4.7.8-armv7-x3 ...

6089504 bytes read in 543 ms (10.7 MiB/s)

loading /boot/dtbs/4.7.8-armv7-x3/omap3-beagle.dtb ...

109840 bytes read in 277 ms (386.7 KiB/s)

debug: [console=ttyO2,115200n8 root=/dev/mmcblk0p2 ro rootfstype=ext4 rootwait musb_hdrc.fifo_mode=5] ...

debug: [bootz 0x82000000 - 0x88000000] ...

## Flattened Device Tree blob at 88000000

   Booting using the fdt blob at 0x88000000

   Loading Device Tree to 8ffe2000, end 8ffffd0f ... OK

Starting kernel ...

[Steve]

Try changing the ttyO2 to ttyS2.

[mkstart]

I try that unsuccessfully again. It surprised me that  bootargs haven't got updated from uEnv.txt file.

uEnv.txt

uname_r=4.7.8-armv7-x3

bootargs=earlyprintk console=ttyS2,115200

However, I did change tty from the u-boot command line directly, resuming boot process with "=> boot" and "=> run bootcmd"(I tried with both because I didn't know which is correct) , and got the same freeze after Starting linux kernel ... output.

Here is my output:

=> editenv console

edit: ttyS2,115200n8

=> boot

switch to partitions #0, OK

mmc0 is current device

SD/MMC found on device 0

Checking for: /uEnv.txt ...

Checking for: /boot/uEnv.txt ...

65 bytes read in 10 ms (5.9 KiB/s)

Loaded environment from /boot/uEnv.txt

Checking if uname_r is set in /boot/uEnv.txt...

Running uname_boot ...

loading /boot/vmlinuz-4.7.8-armv7-x3 ...

6095360 bytes read in 542 ms (10.7 MiB/s)

loading /boot/dtbs/4.7.8-armv7-x3/omap3-beagle.dtb ...

109840 bytes read in 278 ms (385.7 KiB/s)

debug: [console=ttyS2,115200n8 root=/dev/mmcblk0p2 ro rootfstype=ext4 rootwait musb_hdrc.fifo_mode=5] ...

debug: [bootz 0x82000000 - 0x88000000] ...

## Flattened Device Tree blob at 88000000

   Booting using the fdt blob at 0x88000000

   Loading Device Tree to 8ffe2000, end 8ffffd0f ... OK

Starting kernel ...