LIRA currently requires Ubuntu 24.04 LTS with AMD's XRT packages. Ubuntu 26.04 LTS ships with native libxrt-npu2 (2.21.75) in the system repos and kernel 7.0 with built-in amdxdna driver. The kernel-level NPU support is already there, but the VitisAI userspace stack (onnxruntime-vitisai 1.23.3 from RyzenAI 1.7.1) is compiled against AMD's custom XRT and expects /opt/xilinx/xrt/, while Ubuntu 26.04 puts XRT in /usr/lib/x86_64-linux-gnu/.
What works:
NPU detection via xrt-smi examine (memlock limit needs adjustment)
Encoder model compilation for AIE cores (Compilation Complete, ERROR:0)
CPU inference
What fails:
Runtime inference on NPU: custom_op.cpp:1195] unsupported data type 1 — VitisAI provider can't pass data through the system XRT
Suggested fix:
Provide VitisAI runtime wheels compatible with the XRT version shipped in Ubuntu 26.04, or
Document steps to build/install the AMD XRT alongside the system one
System:
Ubuntu 26.04 LTS (Resolute Raccoon)
Kernel 7.0.0-15-generic
AMD Ryzen AI 7 350 (Strix Point/Krackan Point)
Ryzen AI Software 1.7.1
LIRA currently requires Ubuntu 24.04 LTS with AMD's XRT packages. Ubuntu 26.04 LTS ships with native libxrt-npu2 (2.21.75) in the system repos and kernel 7.0 with built-in amdxdna driver. The kernel-level NPU support is already there, but the VitisAI userspace stack (onnxruntime-vitisai 1.23.3 from RyzenAI 1.7.1) is compiled against AMD's custom XRT and expects /opt/xilinx/xrt/, while Ubuntu 26.04 puts XRT in /usr/lib/x86_64-linux-gnu/.
What works:
NPU detection via xrt-smi examine (memlock limit needs adjustment)
Encoder model compilation for AIE cores (Compilation Complete, ERROR:0)
CPU inference
What fails:
Runtime inference on NPU: custom_op.cpp:1195] unsupported data type 1 — VitisAI provider can't pass data through the system XRT
Suggested fix:
Provide VitisAI runtime wheels compatible with the XRT version shipped in Ubuntu 26.04, or
Document steps to build/install the AMD XRT alongside the system one
System:
Ubuntu 26.04 LTS (Resolute Raccoon)
Kernel 7.0.0-15-generic
AMD Ryzen AI 7 350 (Strix Point/Krackan Point)
Ryzen AI Software 1.7.1