Warning
NPU recovery issue after failed inference - #87
Validated on following configuration
| Platform | System | Kernel | Firmware |
|---|---|---|---|
| Meteor Lake | Ubuntu22.04 LTS | 6.8.0-60-generic | 20250611*MTL_CLIENT_SILICON-NVR+NN-deployment*5437076a64c995fd1fbe21c3019f522b56db98f9*5437076a64c995fd1fbe21c3019f522b56db98f9*5437076a64c
|
| Ubuntu24.04 LTS | 6.11.0-26-generic | 20250611*MTL_CLIENT_SILICON-NVR+NN-deployment*5437076a64c995fd1fbe21c3019f522b56db98f9*5437076a64c995fd1fbe21c3019f522b56db98f9*5437076a64c
| |
| Arrow Lake | Ubuntu22.04 LTS | 6.8.0-60-generic | 20250611*MTL_CLIENT_SILICON-NVR+NN-deployment*5437076a64c995fd1fbe21c3019f522b56db98f9*5437076a64c995fd1fbe21c3019f522b56db98f9*5437076a64c
|
| Ubuntu24.04 LTS | 6.11.0-26-generic | 20250611*MTL_CLIENT_SILICON-NVR+NN-deployment*5437076a64c995fd1fbe21c3019f522b56db98f9*5437076a64c995fd1fbe21c3019f522b56db98f9*5437076a64c
| |
| Lunar Lake | Ubuntu22.04 LTS | 6.8.0-60-generic | Jun 11 2025*NPU40xx*build/ci/npu-fw-ci-ci_branch_UD202524_npu_release_25ww22-20250603_183038-26415-8-g5437076a64c*5437076a64c995fd1fbe21c3019f522b56db98f9
|
| Ubuntu24.04 LTS | 6.11.0-26-generic | Jun 11 2025*NPU40xx*build/ci/npu-fw-ci-ci_branch_UD202524_npu_release_25ww22-20250603_183038-26415-8-g5437076a64c*5437076a64c995fd1fbe21c3019f522b56db98f9
|
Common:
| Component | Version |
|---|---|
| Level Zero | v1.22.4 |
| OpenVINO | 2025.2 |
| NPU Compiler | npu_ud_2025_24_rc2 built using OpenVINO_rev.d72b761 |
| GPU Driver | 25.13.33276.16 |
Installation procedure
- Remove old packages
dpkg --purge --force-remove-reinstreq intel-driver-compiler-npu intel-fw-npu intel-level-zero-npu
- Download all *.deb package
- Ubuntu22.04
wget https://github.com/intel/linux-npu-driver/releases/download/v1.19.0/intel-driver-compiler-npu_1.19.0.20250707-16111289554_ubuntu22.04_amd64.deb
wget https://github.com/intel/linux-npu-driver/releases/download/v1.19.0/intel-fw-npu_1.19.0.20250707-16111289554_ubuntu22.04_amd64.deb
wget https://github.com/intel/linux-npu-driver/releases/download/v1.19.0/intel-level-zero-npu_1.19.0.20250707-16111289554_ubuntu22.04_amd64.deb
- Ubuntu24.04
wget https://github.com/intel/linux-npu-driver/releases/download/v1.19.0/intel-driver-compiler-npu_1.19.0.20250707-16111289554_ubuntu24.04_amd64.deb
wget https://github.com/intel/linux-npu-driver/releases/download/v1.19.0/intel-fw-npu_1.19.0.20250707-16111289554_ubuntu24.04_amd64.deb
wget https://github.com/intel/linux-npu-driver/releases/download/v1.19.0/intel-level-zero-npu_1.19.0.20250707-16111289554_ubuntu24.04_amd64.deb
Tip
Since release v1.13.0, there is a checksum.sha256 file in Assets to ensure that the downloaded packages match those available in the repository.
To verify, run:
sha256sum --ignore-missing --check checksum.sha256
- Install libtbb12 which is a dependency for intel-driver-compiler-npu
sudo apt update
sudo apt install libtbb12
- Install all packages
sudo dpkg -i *.deb
- Install Level Zero if it is not in the system
# Check if Level Zero is installed
dpkg -l level-zero
Download and install package if Level Zero is missing
- Ubuntu22.04
wget https://github.com/oneapi-src/level-zero/releases/download/v1.22.4/level-zero_1.22.4+u22.04_amd64.deb
sudo dpkg -i level-zero*.deb
- Ubuntu24.04
wget https://github.com/oneapi-src/level-zero/releases/download/v1.22.4/level-zero_1.22.4+u24.04_amd64.deb
sudo dpkg -i level-zero*.deb
- Reboot
reboot
# if everything works, we should see /dev/accel/accel0 device
ls /dev/accel/accel0
/dev/accel/accel0
# to receive intel_vpu state
dmesg
User access to the device
👉 Ubuntu24.04 does not require setting access to the device
As a root user, this step can be skipped.
The new device /dev/accel/accel0 requires manual setting of permissions access.
The accel devices should be in the "render" group in Ubuntu:
# set the render group for accel device
sudo chown root:render /dev/accel/accel0
sudo chmod g+rw /dev/accel/accel0
# add user to the render group
sudo usermod -a -G render <user-name>
# user needs to restart the session to use the new group (log out and log in)
The above steps must be repeated each time module is reloaded or on every reboot.
To avoid manual setup of the group for accel device, the udev rules can be used:
sudo bash -c "echo 'SUBSYSTEM==\"accel\", KERNEL==\"accel*\", GROUP=\"render\", MODE=\"0660\"' > /etc/udev/rules.d/10-intel-vpu.rules"
sudo udevadm control --reload-rules
sudo udevadm trigger --subsystem-match=accel
Tip
In case of NPU is not visible, always check the access to the device with following command:
$ ls -lah /dev/accel/accel0
crw-rw---- 1 root render 261, 0 Mar 22 13:22 /dev/accel/accel0
If render is missing, or crw-rw---- is not set, please repeat the steps to set the access to the device.
Important
For more information check README.md