Zephyr 26.04 release notes¶
Zephyr 26.04 LTS is Canonical’s distribution of upstream Zephyr 4.4.
Development environment¶
The standard development path uses Workshop. Use the zephyr SDK from the
26.04/stable channel.
Source distribution¶
Canonical maintains the source repositories in the Zephyr RTOS Launchpad
project. The Canonical west manifest pins the tested repository
revisions. The current source set is published with the immutable
26.04.0 tag.
Known limitations¶
Workshop support requires an Ubuntu or snap-enabled Linux host. Use the host system installation path on an Ubuntu 26.04 host that cannot run Workshop.
Probe-based flashing over a USB debug probe does not work in Workshop 26.04.
A custom-device plug with subsystem: usb can show as connected while the
container receives no /dev/bus/usb/ device node. The flash tool then
reports LIBUSB_ERROR_NO_DEVICE. A tty plug for the same board is
unaffected. See the pass-through warning in the
flash hardware tutorial.
The upstream pip model (pip install -r requirements.txt) does not
work on a clean 26.04 image. It builds C extensions such as
ruamel-yaml-clib from source, which requires python3-dev, a package
that is not preinstalled. Install python3-dev or use the
host install guide, which installs the
Python requirements as packages.