Dear Sir, Apologize for this question again, this is extend from the this topic below [image] [Jetson Xavier NX]UART with debug function consult Jetson Xavier NX Dear Sir, In the Jetson Xavier NX DevKit, It seems use the UART2 as a Debug port which will print…

hello momo_chen, you’ll need to update these 5 files, please disable combined uart and assign the correct uart port for the logs. bootloader/t186ref/tegra194-a02-bpmp-p3668-a00.dtb kernel/dtb/tegra194-p3668-all-p3509-0000.dtb bootloader/t186ref/BCT/tegra194-mb1-bct-misc-l4t.cfg bootloader/t186re…

hello momo_chen, all the logs were sending to UART2 (i.e. Debug UART) is reserve for kernel debug purpose. according to the screenshot, that’s mb1 logs, you may also check Boot flow for reference. FYI, could you please follow-up this topic, Topic 160948 , it shows some changes for disabling combi…

Dear Jerry, According the topic 160948, I will try to build the new Image first with those code below Linux_for_Tegra/sources/hardware/nvidia/platform/t19x/jakku/kernel-dts/common/tegra194-p3668-common.dtsi chosen { -- bootargs ="console=ttyTCU0,115200"; ++ bootargs ="…

UART_tune_20210706.log (6.3 KB) Dear Jerry, As the log file above, It will stuck with those configure that mention above. UART1 will no message, HDMI no output Image. Best Regards, MOMO Chen

hello momo_chen, is it possible the noise to interrupt the boot process? could you please disconnect every peripheral I/O and try again, thanks

Dear Jerry, No offense, but I guess that might be caused by enable_combined_uart = 0; spe_uart_instance = 0xff; If I use the default value to both argument, xavier devkit will booting to OS even the UART2 behavior seems strange(typing be difficult) with new dts(ttyS2…etc) setting. Would you mind…

hello momo_chen, we’re also reproduce the same failure as yours, it got boot stuck at NVIDIA logo screen after disable combined-uart. it’s now still under internal investigation. thanks

Dear Jerry, Sorry to reply late, Since we’re afraid there might other unknown risk between Xavier and our micro-processor. we’ve change our design recently. About this section, I will validate them later. Apologize to waste your time and thanks for your reply kindly. Best Regards, MOMO Chen

[Jetson Xavier NX] UART Tune

Robotics & Edge Computing Jetson Systems Jetson Xavier NX

momo_chen July 14, 2021, 8:39am 11

Dear Jerry,

Sorry to bother you, Is there any advice to these argument or any other suggestion??

Best Regards,
MOMO Chen

Disabling UART debug prints over ttyTCU0

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[Jetson Xavier NX] UART Tune

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