ZE_RESULT_ERROR_UNINITIALIZED, code 0x78000001 - driver is not initialized

I am trying to run Gemma 4 E4B on Intel NPU + linux + ovms and got the following error:

```
VLM pipeline generation failed: Exception from src/inference/src/cpp/infer_request.cpp:246:
Exception from src/plugins/intel_npu/src/utils/src/zero/zero_wrappers.cpp:208:
L0 pfnAppendGraphExecute result: ZE_RESULT_ERROR_UNINITIALIZED, code 0x78000001 - driver is not initialized .
```

When I check dmesg I see following:

```
[534680.885730] intel_vpu 0000:00:0b.0: [drm] *ERROR* ivpu_bo_alloc_vpu_addr(): Failed to add BO to context 2: -28
[534680.885734] intel_vpu 0000:00:0b.0: [drm] *ERROR* ivpu_bo_create_ioctl(): Failed to create handle for BO: 000000006ab25868 (ctx 2 size 12378496 flags 0x20002)

```

I have tried to add:
1. GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_iommu=on,sm_on"
2. sudo modprobe intel_vpu force_snoop=1

And had no success.

Ubuntu 24.04.5 LTS
6.17.0-1032-oem
Intel© Core™ Ultra 7 265H × 16

OpenVINO Model Server 2026.3.0.6f3df706b
OpenVINO backend 2026.3.0-22451-8a17657b995-releases/2026/3
OpenVINO GenAI backend 2026.3.0.0-3277-bd8d6542e3c

intel_vpu 0000:00:0b.0: [drm] Firmware: intel/vpu/vpu_37xx_v1.bin, version: 20260630

modinfo -F version intel_vpu
1.0.0 6.17.0-1032-oem

Start by reproducing Gemma 4 E4B through OpenVINO Model Server on the listed Ubuntu kernel and inspect dmesg alongside the intel_vpu module logs. Trace the ZE_RESULT_ERROR_UNINITIALIZED failure back to the reported VPU buffer-allocation error; done means identifying a confirmed cause and an actionable fix or compatibility requirement.

Written by the indexing model from the issue text.