AGX Thor / JetPack 7.1 - DCE_MBOX_TO_DCE_RM left dirty by UEFI causing RmInitAdapter failure on specific units

johan81 · May 12, 2026, 11:04am

Hi,

We are deploying multiple AGX Thor Developer Kit units (all running JetPack 7.1-b112, BSP 38.4.0-20251230160601, UEFI 38.4.0-gcid-43443517 dated 12/30/2025, Tegra Revision A01 SKU 160) and have encountered a reproducible DCE initialization failure on one specific unit that persists across cold power cycles.

On boot, GPU ID 0x00020000 (the DCE-managed display GPU at 0002:00:00.0) fails to initialize. The integrated GPU (nvidia0) works correctly. The display output is non-functional. lspci shows all-0xff in the config space for that device.

=== NVIDIA DCE Diagnostic Report ===
Date: Tue May 12 10:21:24 AM CEST 2026

=== Jetson Model ===
NVIDIA Jetson AGX Thor Developer Kit
=== Tegra Revision ===

=== JetPack Version ===

R38 (release), REVISION: 4.0, GCID: 43443517, BOARD: generic, EABI: aarch64, DATE: Wed Dec 31 00:15:19 UTC 2025

KERNEL_VARIANT: oot

TARGET_USERSPACE_LIB_DIR=nvidia
TARGET_USERSPACE_LIB_DIR_ INSTALL_TYPE=
hi nvidia-jetpack ii nvidia-jetpack-dev ii nvidia-jetpack-runtime ii nvidia-l4t-3d-core ii nvidia-l4t-adaruntime ii nvidia-l4t-apt-source ii nvidia-l4t-bootloader ii nvidia-l4t-bootloader-utils ii nvidia-l4t-bsp-openrm ii nvidia-l4t-camera ii nvidia-l4t-configs hi nvidia-l4t-core ii nvidia-l4t-cuda ii nvidia-l4t-cuda-utils ii nvidia-l4t-cudadebuggingsupport ii nvidia-l4t-display-kernel ii nvidia-l4t-extlinux ii nvidia-l4t-firmware ii nvidia-l4t-firmware-openrm ii nvidia-l4t-firstboot ii nvidia-l4t-gbm ii nvidia-l4t-graphics-demos ii nvidia-l4t-gstreamer ii nvidia-l4t-init ii nvidia-l4t-init-openrm ii nvidia-l4t-initrd ii nvidia-l4t-jetson-io ii nvidia-l4t-jetson-multimedia-api ii nvidia-l4t-jetsonpower-gui-tools ii nvidia-l4t-kernel ii nvidia-l4t-kernel-dtbs ii nvidia-l4t-kernel-headers ii nvidia-l4t-kernel-module-configs ii nvidia-l4t-kernel-oot-headers ii nvidia-l4t-kernel-oot-modules ii nvidia-l4t-kernel-openrm ii nvidia-l4t-kernel-partitions ii nvidia-l4t-libvulkan ii nvidia-l4t-multimedia ii nvidia-l4t-multimedia-openrm ii nvidia-l4t-multimedia-utils ii nvidia-l4t-nvfancontrol ii nvidia-l4t-nvml ii nvidia-l4t-nvpmodel ii nvidia-l4t-nvpmodel-gui-tools ii nvidia-l4t-nvsci ii nvidia-l4t-oobe ii nvidia-l4t-openwfd ii nvidia-l4t-optee ii nvidia-l4t-pva ii nvidia-l4t-tools ii nvidia-l4t-usb-service ii nvidia-l4t-video-codec-openrm ii nvidia-l4t-vulkan-sc-dev ii nvidia-l4t-vulkan-sc-openrm ii nvidia-l4t-vulkan-sc-samples ii nvidia-l4t-vulkan-sc-sdk ii nvidia-l4t-wayland ii nvidia-l4t-weston ii nvidia-l4t-wpasupplicant ii nvidia-l4t-x11 ii nvidia-l4t-xwayland PATH=usr/lib/aarch64-linux-gnu/nvidia
7.1-b112 arm64 NVIDIA Jetpack Meta Package
7.1-b112 arm64 NVIDIA Jetpack dev Meta Package
7.1-b112 arm64 NVIDIA Jetpack runtime Meta Package
38.4.0-20251230160601 arm64 NVIDIA GL EGL Package
38.4.0-20251230160601 arm64 NVIDIA Ada Runtime Package
38.4.0-20251230160601 arm64 NVIDIA L4T apt source list debian package
38.4.0-20251230160601 arm64 NVIDIA Bootloader Package
38.4.0-20251230160601 arm64 NVIDIA Bootloader Utils Package
38.4.0-20251230160601 arm64 NVIDIA L4T BSP meta Package
38.4.0-20251230160601 arm64 NVIDIA Camera Package
38.4.0-20251230160601 arm64 NVIDIA configs debian package
38.4.0-20251230160601 arm64 NVIDIA Core Package
38.4.0-20251230160601 arm64 NVIDIA CUDA Package
38.4.0-20251230160601 arm64 NVIDIA CUDA utilities
13.0-36205356.0 arm64 NVIDIA CUDA Debugger Support Package
6.8.12-tegra-38.4.0-20251230160601 arm64 NVIDIA Display Kernel Modules Package
38.4.0-20251230160601 arm64 NVIDIA Extlinux Package
38.4.0-20251230160601 arm64 NVIDIA Firmware Package
38.4.0-20251230160601 arm64 NVIDIA l4t openrm specific debian
38.4.0-20251230160601 arm64 NVIDIA Firstboot package
38.4.0-20251230160601 arm64 NVIDIA GBM Package
38.4.0-20251230160601 arm64 NVIDIA graphics demo applications
38.4.0-20251230160601 arm64 NVIDIA GST Application files
38.4.0-20251230160601 arm64 NVIDIA Init debian package
38.4.0-20251230160601 arm64 NVIDIA Init debian package containing openrm specific files
38.4.0-20251230160601 arm64 NVIDIA initrd debian package
38.4.0-20251230160601 arm64 NVIDIA Jetson.IO debian package
38.4.0-20251230160601 arm64 NVIDIA Jetson Multimedia API is a collection of lower-level APIs that support flexible application development.
38.4.0-20251230160601 arm64 NVIDIA Jetson Power GUI Tools debian package
6.8.12-tegra-38.4.0-20251230160601 arm64 NVIDIA Kernel Package
6.8.12-tegra-38.4.0-20251230160601 arm64 NVIDIA Kernel DTB Package
6.8.12-tegra-38.4.0-20251230160601 arm64 NVIDIA Linux Tegra Kernel Headers Package
6.8.12-tegra-38.4.0-20251230160601 arm64 NVIDIA System-wide Kernel Module Configuration Package
6.8.12-tegra-38.4.0-20251230160601 arm64 NVIDIA OOT Kernel Module Headers Package
6.8.12-tegra-38.4.0-20251230160601 arm64 NVIDIA OOT Kernel Module Drivers Package
6.8.12-tegra-38.4.0-20251230160601 arm64 NVIDIA Kernel Package containing OpenRM specific files
6.8.12-tegra-38.4.0-20251230160601 arm64 NVIDIA Kernel and Kernel DTB Partition Package
38.4.0-20251230160601 arm64 NVIDIA Vulkan Loader Package
38.4.0-20251230160601 arm64 NVIDIA Multimedia Package
38.4.0-20251230160601 arm64 NVIDIA Multimedia OpenRM Package
38.4.0-20251230160601 arm64 NVIDIA Multimedia Package
38.4.0-20251230160601 arm64 NVIDIA Nvfancontrol debian package
38.4.0-20251230160601 arm64 NVIDIA NVML Package
38.4.0-20251230160601 arm64 NVIDIA Nvpmodel debian package
38.4.0-20251230160601 arm64 NVIDIA Nvpmodel GUI Tools debian package
38.4.0-20251230160601 arm64 NVIDIA NvSci Package
38.4.0-20251230160601 arm64 NVIDIA OOBE Package
38.4.0-20251230160601 arm64 NVIDIA OpenWFD Package
38.4.0-20251230160601 arm64 OP-TEE userspace daemons, test programs and libraries
38.4.0-20251230160601 arm64 NVIDIA PVA Package
38.4.0-20251230160601 arm64 NVIDIA Public Test Tools Package
38.4.0-20251230160601 arm64 NVIDIA USB device mode service debian package
38.4.0-20251230160601 arm64 NVIDIA Multimedia OpenRM Package
38.4.0-20251230160601 arm64 NVIDIA Vulkan SC Dev package
38.4.0-20251230160601 arm64 NVIDIA Vulkan SC run-time openrm package
38.4.0-20251230160601 arm64 NVIDIA Vulkan SC samples package
38.4.0-20251230160601 arm64 NVIDIA Vulkan SC SDK package
38.4.0-20251230160601 arm64 NVIDIA Wayland Package
38.4.0-20251230160601 arm64 NVIDIA Weston Package
38.4.0-20251230160601 arm64 NVIDIA user mode wifi daemon package
38.4.0-20251230160601 arm64 NVIDIA X11 Package
38.4.0-20251230160601 arm64 NVIDIA XCB-X11 library that enables X applications to run on Wayland compositors with hardware acceleration

=== BIOS/UEFI Info ===

dmidecode 3.5

Getting SMBIOS data from sysfs.
SMBIOS 3.6.0 present.

SMBIOS implementations newer than version 3.5.0 are not

fully supported by this version of dmidecode.

Handle 0x0000, DMI type 0, 26 bytes
BIOS Information
Vendor: EDK II
Version: 38.4.0-gcid-43443517
Release Date: 12/30/2025
ROM Size: 0 MB
Characteristics:
PCI is supported
PNP is supported
BIOS is upgradeable
BIOS shadowing is allowed
Boot from CD is supported
Selectable boot is supported
ACPI is supported
Targeted content distribution is supported
UEFI is supported
BIOS Revision: 0.0
Firmware Revision: 0.0

Handle 0x0004, DMI type 13, 22 bytes
BIOS Language Information
Language Description Format: Long
Installable Languages: 1
en|US|iso8859-1
Currently Installed Language: en|US|iso8859-1

=== EFI Boot Chain ===
00000000: 0600 0000 0100 0000 …
00000000: 0600 0000 0000 0000 …

=== TegraPlatformSpec ===
3834-400-0008-H.1-1-1-p3834-0008-p4071-0000-nvme-
3834-000-0008–1–jetson-agx-thor-devkit-

=== PCI Devices ===
-[0000:00]—00.0-[01-ff]----00.0 NVIDIA Corporation Device 2b00
-[0001:00]—00.0-[01-ff]----00.0 Realtek Semiconductor Co., Ltd. RTL8852CE PCIe 802.11ax Wireless Network Controller
-[0002:00]—00.0-[01-ff]----00.0 Realtek Semiconductor Co., Ltd. Device 8126
-[0005:00]—00.0-[01-ff]----00.0 Samsung Electronics Co Ltd Device a810

=== GPU PCI Config Space (0000:01:00.0) ===
0000:01:00.0 3D controller: NVIDIA Corporation Device 2b00 (rev a1)
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ef0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
f10: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
f20: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
f30: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
f40: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
f50: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
f60: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
f70: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
f90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
fa0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
fb0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
fc0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
fd0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
fe0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

=== nvidia-l4t-firmware package contents (tegra264) ===
/lib/firmware/nvidia/tegra264
/lib/firmware/nvidia/tegra264/vic.bin
/lib/firmware/nvidia/tegra264/vic.bin

=== DCE Firmware Files ===
/usr/lib/firmware/display-t234-dce.bin
/usr/lib/firmware/display-t264-dce.bin
/lib/firmware/display-t234-dce.bin
/lib/firmware/display-t264-dce.bin

=== Boot Args ===
usbcore.usbfs_memory_mb=1000 root=PARTUUID=6dbf3837-ad8c-4979-8417-59ee4febbf90 rw rootwait rootfstype=ext4 mminit_loglevel=4 earlycon=tegra_utc,mmio32,0xc5a0000 console=tty0 console=ttyUTC0,115200 clk_ignore_unused firmware_class.path=/etc/firmware fbcon=map:0 nospectre_bhb efi=runtime bl_prof_dataptr=6225920@0x2008010000 bl_prof_ro_ptr=65536@0x20 video=HDMI-A-1:1920x1080M@60D bl_prof_dataptr=6225920@0x2004010000 bl_prof_ro_ptr=65536@0x2004000000 clk_ignore_unused pd_ignore_unused console=tty0

=== extlinux.conf ===
TIMEOUT 30
DEFAULT primary

MENU TITLE L4T boot options

LABEL primary
MENU LABEL primary kernel
LINUX /boot/Image
INITRD /boot/initrd
APPEND usbcore.usbfs_memory_mb=1000 ${cbootargs} root=PARTUUID=6dbf3837-ad8c-4979-8417-59ee4febbf90 rw rootwait rootfstype=ext4 mminit_loglevel=4 earlycon=tegra_utc,mmio32,0xc5a0000 console=tty0 console=ttyUTC0,115200 clk_ignore_unused firmware_class.path=/etc/firmware fbcon=map:0 nospectre_bhb efi=runtime bl_prof_dataptr=6225920@0x2008010000 bl_prof_ro_ptr=65536@0x20 video=HDMI-A-1:1920x1080M@60D

=== DCE Device Tree Node ===
dce@8808000000 {
iommus = <0x14b 0x500>;
interrupts = <0x00 0xee 0x04>;
compatible = “nvidia,tegra264-dce”;
status = “okay”;
interrupt-names = “dce-smb-0\0dce-smb-1\0dce-smb-2\0dce-smb-3”;
reg = <0x88 0x8000000 0x00 0x800000>;

	sha-carveout {
		compatible = "sha-carveout";
		status = "okay";
	};
};

bwmgr {
	nvidia,bpmp = <0x02>;

=== DCE Boot Status ===
DCE_FW_BOOT_DONE

johan81 · May 12, 2026, 11:33am

Just read about issue 5525468 in the 38.4 release notes. Looks related to our problem.

Is there a workaround to disable DCE suspend in UEFI phase to avoid the race?
Can the UEFI boot args be used to suppress DCE power gating before Linux handoff?
Is a fix planned in a 38.4.x point release?

KevinFFF · May 13, 2026, 6:50am

Hi johan81,

Your issue happens on specific one board during boot up so it may not be the same issue as 5525468.

Please use SDK manager to perform full flash for this problematic board to check if there’s still the issue.
If so, could you provide the full serial console log as file here for further check?

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