TK1 boot loop after flash

Hello guys,

I have 2 TK1 kit which has the same issue when flashing R21.8 (previously it running R21.4)
The Host is Ubuntu 20.04.3 LTS. Flash log complete successful:

sending file: tegra124-jetson_tk1-pm375-000-c00-00.dtb
- 59966/59966 bytes sent
tegra124-jetson_tk1-pm375-000-c00-00.dtb sent successfully
odm data: 0x6009c000
downloading bootloader -- load address: 0x83d88000 entry point: 0x83d88000
sending file: fastboot.bin
- 594363/594363 bytes sent
fastboot.bin sent successfully
waiting for bootloader to initialize
bootloader downloaded successfully
ML execution and Cpu Handover took 1 Secs
Partition backup took 0 Secs
setting device: 2 3
deleting device partitions
creating partition: BCT
creating partition: PPT
creating partition: PT
creating partition: EBT
creating partition: LNX
creating partition: SOS
creating partition: NVC
creating partition: MPB
creating partition: MBP
creating partition: GP1
creating partition: APP
creating partition: DTB
creating partition: EFI
creating partition: USP
creating partition: TP1
creating partition: TP2
creating partition: TP3
creating partition: WB0
creating partition: UDA
creating partition: GPT
sending file: ppt.img
\ 2097152/2097152 bytes sent
ppt.img sent successfully
padded 8 bytes to bootloader
sending file: u-boot.bin
- 625776/625776 bytes sent
u-boot.bin sent successfully
sending file: system.img
- 2311235068/2311235068 bytes sent
system.img sent successfully
sending file: tegra124-jetson_tk1-pm375-000-c00-00.dtb
- 59966/59966 bytes sent
tegra124-jetson_tk1-pm375-000-c00-00.dtb sent successfully
sending file: gpt.img
\ 2097152/2097152 bytes sent
gpt.img sent successfully
Create, format and download  took 162 Secs
Time taken for flashing 165 Secs
*** The target ardbeg has been flashed successfully. ***
Reset the board to boot from internal eMMC.

i dont have a console cable (i will try to find one) here are some screenshots of R21.4 and R21.8 boot loop.

ubuntu@tegra-ubuntu:~$ cat /etc/nv_tegra_release 
# R21 (release), REVISION: 4.0, GCID: 5650832, BOARD: ardbeg, EABI: hard, DATE: Thu Jun 25 22:38:59 UTC 2015
7c0e59658a9f05c0f81a92c6c79d35ed0d144c43 */usr/lib/xorg/modules/drivers/nvidia_drv.so
a78016854fa1475c1f5271a43b928492ec5f66d3 */usr/lib/xorg/modules/extensions/libglx.so
3a6ad4641f163aa65b7f453637dfaff511e554a5 */usr/lib/arm-linux-gnueabihf/tegra/libnvmmlite_video.so

The symptom same as this topic Jetson tk1 stuck in boot after flashing
Thank you for your help in advance!
-Khanhj-

Solved. Reflash using ubuntu host 14.04.7

Good to know issue resolved. Thanks