BBB hang while powerup when using with “GEN4-4DCAPE-70CT” cape

Dear Developers,

I have bought Beaglebone black rev C (PCB rev B6) and flashed “bone-debian-9.3-lxqt-armhf-2018-01-28-4gb.img” in emmc1 on BBB and emmc0 SD card.

After I have connected “GEN4-4DCAPE-70CT” LCD with BeagleBone Black and did power cycle (using powerdown button on BBB or using shutdown -h now command ) sometime (once per 10 time) I get garbage value from debug port of BBB just before starting of Kernel and complete system hang up.

Following is debug output I get when I face this problem:


U-Boot SPL 2018.01-00002-g9aa111a004 (Jan 20 2018 - 12:45:29)

Trying to boot from MMC2

U-Boot 2018.01-00002-g9aa111a004 (Jan 20 2018 - 12:45:29 -0600), Build: jenkins-github_Bootloader-Builder-32

CPU : AM335X-GP rev 2.1

I2C: ready

DRAM: 512 MiB

No match for driver ‘omap_hsmmc’

No match for driver ‘omap_hsmmc’

Some drivers were not found

Reset Source: Power-on reset has occurred.


Using default environment

Board: BeagleBone Black

not set. Validating first E-fuse MAC

BeagleBone Black:

Model: Element14 BeagleBone Black Industrial:

debug: process_cape_part_number:[BB-BONE-4D7C-01]

debug: process_cape_part_number:[42422D424F4E452D344437432D3031]

BeagleBone: cape eeprom: i2c_probe: 0x54: /lib/firmware/BB-BONE-4D7C-01-00A1.dtbo [0xfe133cf]

BeagleBone: cape eeprom: i2c_probe: 0x55:

BeagleBone: cape eeprom: i2c_probe: 0x56:

BeagleBone: cape eeprom: i2c_probe: 0x57:

Net: eth0: MII MODE

cpsw, usb_ether

Press SPACE to abort autoboot in 2 seconds

board_name=[A335BNLT] …

board_rev=[EIA0] …

switch to partitions #0, OK

mmc0 is current device

SD/MMC found on device 0

** Bad device 0:2 0x82000000 **

** Bad device 0:2 0x82000000 **

switch to partitions #0, OK

mmc0 is current device

Scanning mmc 0:1…

gpio: pin 56 (gpio 56) value is 0

gpio: pin 55 (gpio 55) value is 0

gpio: pin 54 (gpio 54) value is 0

gpio: pin 53 (gpio 53) value is 1

switch to partitions #0, OK

mmc0 is current device

gpio: pin 54 (gpio 54) value is 1

Checking for: /uEnv.txt …

Checking for: /boot.scr …

Checking for: /boot/boot.scr …

Checking for: /boot/uEnv.txt …

gpio: pin 55 (gpio 55) value is 1

2061 bytes read in 46 ms (43 KiB/s)

Loaded environment from /boot/uEnv.txt

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

gpio: pin 56 (gpio 56) value is 1

Running uname_boot …

loading /boot/vmlinuz-4.9.78-ti-r94 …

9960536 bytes read in 665 ms (14.3 MiB/s)

uboot_overlays: [uboot_base_dtb=am335x-boneblack-uboot.dtb] …

uboot_overlays: Switching too: dtb=am335x-boneblack-uboot.dtb …

loading /boot/dtbs/4.9.78-ti-r94/am335x-boneblack-uboot.dtb …

61626 bytes read in 62 ms (969.7 KiB/s)

uboot_overlays: [fdt_buffer=0x60000] …

uboot_overlays: loading /lib/firmware/BB-BONE-4D7C-01-00A1.dtbo …

4578 bytes read in 92 ms (47.9 KiB/s)

uboot_overlays: loading /lib/firmware/BB-BONE-eMMC1-01-00A0.dtbo …

1105 bytes read in 255 ms (3.9 KiB/s)

uboot_overlays: loading /lib/firmware/BB-ADC-00A0.dtbo …

695 bytes read in 550 ms (1000 Bytes/s)

uboot_overlays: [uboot_detected_capes=BB-BONE-4D7C-01,] …

uboot_overlays: cape universal disabled, external cape enabled or detected…

loading /boot/initrd.img-4.9.78-ti-r94 …

6300596 bytes read in 429 ms (14 MiB/s)

debug: [console=ttyO0,115200n8 bone_capemgr.uboot_capemgr_enabled=1 root=/dev/mmcblk0p1 ro rootfstype=ext4 rootwait uboot_detected_capes=BB-BONE-4D7C-.

debug: [bootz 0x82000000 0x88080000:6023b4 88000000] …

Flattened Device Tree blob at 88000000

Booting using the fdt blob at 0x88000000

Loading Ramdisk to 8f9fd000, end 8ffff3b4 … OK

reserving fdt memory region: addr=88000000 size=70000

Loading Device Tree to 8f98a000, end 8f9fcfff … OK

// Note problem occur before starting kernel



Please inform me what can be possible reason for this issue and how can I solve it or if you need any other information from me…Thank you very much :slight_smile:

Please reflash with latest image…


Hello Mr Nelson,

Using image bone-debian-9.5-lxqt-armhf-2018-10-07-4gb.img has solved this problem. Thank you very much for your help. Can you please also inform me, why exactly sometime I was getting problem with “bone-debian-9.3-lxqt-armhf-2018-01-28-4gb.img”.

Kind regards

Saurabh Jain

Dear Mr Nelson,

Today I have faced same problem that when I boot BBB using SD card, I get garbage value on serial port and operating system in BBB hangs. Presently I am using bone-debian-9.5-lxqt-armhf-2018-10-07-4gb.img (latest) to work with BBB.

Kindly inform me how can I find out main cause of problem and how can I fix it.

Thanks and Regards

Saurabh Jain