On May 14, 2026, the open-source project rkdebian released a pre-release Debian 12 Bookworm image for the Doogee U10 tablet, which utilizes the Rockchip RK3562 system-on-chip. Developed independently by the tech4bot community, this build allows users to boot a full Linux desktop environment directly from an SD card without requiring bootloader unlocking or modifying the internal eMMC storage containing Android. Upon removing the SD card, the device automatically reverts to stock Android. The project was built from scratch without access to official vendor documentation or binary support packages, relying instead on the Firefly RK3562 open-source repositories and assistance from various AI models. The resulting image supports the tablet's 10.1-inch display, Wi-Fi, Bluetooth, audio, sensors, and the Rockchip Neural Processing Unit (NPU). While 3D acceleration and camera color tuning are currently partial, core functionalities such as multitouch, touchscreen input, and NPU-based local LLM inference are fully operational. The system ships with the Phosh desktop environment and includes pre-installed applications like Firefox ESR, FreeTube, Dolphin file manager, and Okular. Notably, the image features optimized support for running local large language models on the NPU using the RKLLM stack. Benchmarks conducted in April 2026 indicate that the Qwen3-0.6B model achieves inference speeds up to 24.9 tokens per second on this hardware. The build system, managed via the build.sh script, compiles the U-Boot bootloader, Linux kernel, and Debian root filesystem. Users can customize the build through environment variables and command-line flags to select GPU stacks, desktop backends, and CPU power governors. The process generates a bootable SD card image that expands the root filesystem automatically upon first boot. Additionally, the project supports Over-The-Air (OTA) updates, allowing users to apply software patches via a generated tarball without reflashing the entire card. Compatibility is restricted to x86-64 Linux hosts for the build process. The repository includes comprehensive documentation on the image layout, kernel versions, and third-party component licenses, covering proprietary Mali GPU binaries and vendor-specific drivers for the Seekwave Wi-Fi module. The software is distributed under the MIT License, with upstream components retaining their original licenses. This release represents a significant achievement in bringing desktop-class Linux capabilities to ARM-based tablets through reverse engineering and community collaboration.