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L4T R32.6.1 Notes
As of 10 Aug 2021, the dunfell branch supports L4T R32.6.1/JetPack 4.6. Users of dunfell that wish to remain
at L4T R32.3.1 should switch to the dunfell-l4t-r32.3.1 branch. As of 11 Aug 2021, the master branch was also
updated to R32.6.1.
NVIDIA documentation:
- R32.6.1 adds support for the Jetson AGX Xavier industrial module. No machine
.confis present in the layer yet for this module. - Support for the Jetson AGX Xavier 8GB module has been removed.
Note that NVIDIA has announced that this L4T release will be the last to support the t210 (TX1/Nano) and t186 (TX2) platforms.
The flash layout XML files for the Xavier platforms in the L4T BSP have been modified to include new attributes (but no location/size
changes). In particular, the xusb-fw partition is now marked oem_signed="true", as cboot now performs signature validation
on the USB controller firmware.
The Linux kernel in R32.6.1 has been updated to a 4.9.253 base.
The U-Boot in L4T R32.6.1 remains at U-Boot v2020.04, with added patches from NVIDIA. In this layer we continue to track the upstream OE-Core U-Boot recipes in each branch, porting NVIDIA patches to our fork of the upstream U-Boot repository.
Note that unlike NVIDIA, our U-Boot fork uses a separate build configuration for the SDcard-based Nano (sku 0000) and the eMMC production Nano (sku 0002), so patches related to supporting both in the same build have not been applied.
cboot on the t186/t194 platforms added a new "unified" A/B redundancy mode that associates a bootloader slot with a rootfs slot. For OE4T, this is equivalent to the "user" redundancy mode that we were already using.
- As mentioned above, the USB controller firmware is now signed on t194 platforms.
- The PT (Tegra partition table) partition on t210 platforms now gets a 16-byte trailer added.
- Bootloader update payloads (BUPs) have been changed to include more version information in the header.
- The Jetson-specific container runtime (
libnvidia-container-tools) was updated to version 0.10, which adds a mechanism for filtering out some of the pass-through mounts.
JetPack 4.6 includes the following updates:
- VPI 1.1
- CUDA 10.2.300
- TensorRT 8.0.1
- cuDNN 8.2.1
The Deepstream SDK recipe in the layer is still at version 5.1 (and is unlikely to work with the R32.6.1 BSP). A new version (6.0) of the DeepStream SDK that supports JetPack 4.6 is expected in October 2021.