Orin NX 16G + jetpack6.2/L4T 36.4.3 boot time optimization, r36.4.3 bootloader takes more than 10s during the cold boot

Robotics & Edge Computing Jetson & Embedded Systems Jetson Orin Nano
1

Continuing the discussion from Jetson UEFI r36.4.3 takes an excessively long time during the cold boot process of Orin NX (jetpack6.2), how to optimize UEFI boot time:

Attached log file is the debug uart log for Orin NX 16G(r36.4.3) during cold boot,uefi debug log is enabled
from the log,we can see the following information
(1)From power on to Ubuntu system login, it took a total of 27.290s
(2)Linux kernel and Linux userspace took 13.669s
(3)PSCROM+MB1+MB2+UEFI took more than 10s

#start boot MB1
[2025-11-18 17:16:03.579] [0000.062] I> MB1 (version: 1.4.0.4-t234-54845784-e89ea9bc)

#ubuntu2204 system login
[2025-11-18 17:16:30.869] localhost login:

kernel and userspace boot time
[2025-11-18 17:16:53.297] root@localhost:/home/agi#systemd-analyze time
[2025-11-18 17:17:31.445] Startup finished in 6.302s (kernel) + 7.366s (userspace) = 13.669s
[2025-11-18 17:17:31.451] graphical.target reached after 7.349s in userspace

we want to reduce the time consumption of UEFI r36.4.3 during cold boot

OrinNX16G_R36.4.3_boot_uart_2025-11-18_17_15_50.log (135.4 KB)

4

Hi @530266047 ,

Yes, the boot time can be reduced. NVIDIA provides several official boot-time optimization guides that you can follow, and many of the recommendations still apply to newer Jetson releases. You can review and apply the optimizations described here:

These guides cover techniques for reducing kernel and boot times. You can apply the modifications according to your requirements and choose the optimizations that fit your needs.

If you have more question, feel free to ask!

Best Regards,

Oscar Mendez
Embedded SW Engineer at RidgeRun
Contact us: support@ridgerun.com
Developers wiki: https://developer.ridgerun.com/
Website: www.ridgerun.com

5

//Startup finished in 6.302s (kernel) + 7.366s (userspace) = 13.669s

We have tailored and optimized the Linux Kernel Driver, Linux file system, and systemd services in the Linux user space. Now there is an urgent need to optimize the boot time of the PSCROM/MB1/MB2/UEFI components