Canonical has begun building official Ubuntu desktop images for 64-bit RISC-V (riscv64), shipping experimental Ubuntu 26.10 ISOs with a GNOME desktop and a lighter Xubuntu (Xfce) variant. The images target modern RVA23+ RISC-V hardware and were tested on the SpacemiT K3 board; they are labeled experimental and carry no official support yet, with a final release due 15 October 2026. On real RISC-V hardware the GNOME image is reported to be performant, but GNOME under QEMU can take up to 30 minutes to load, which motivated offering a smaller Xfce build for emulation and lower-end boards.
Delivering desktop ISOs required multiple platform changes: adding RISC-V support to Flutter so many Ubuntu apps (including the installer) run, modifying livecd-rootfs to handle device trees, and adapting the build pipeline to produce riscv64 ISOs. Some snaps are not yet RISC-V ready - the App Center is an example - and vendors previously hosted their own recovery images for RISC-V devices; official desktop ISOs now join Intel/AMD and Arm64 downloads. An Ubuntu 26.04.1 LTS riscv64 desktop ISO is also available (without K3 support yet), and test images can be fetched from the daily builds on cdimage.ubuntu.com.
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