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## Description After a fresh installation of Armbian for Rockchip64 (Rock 3A), the system ships with `linux-image-current-rockchip64` version **26.2.1** (kernel 6.18.8), but the corresponding `linux-headers-current-rockchip64` package for version 26.2.1 is **not available** in the public APT repositories. This prevents installation of kernel headers required for DKMS modules, out-of-tree drivers, or any kernel module compilation. ## Steps to Reproduce 1. Flash the latest Armbian image for `rock-3a` (branch: `current`) from the official download page. 2. Boot the device and connect to the network. 3. Run `apt update` with any standard mirror (e.g., `mirrors.tuna.tsinghua.edu.cn`, `mirror.yandex.ru`). 4. Check installed kernel version: ```bash uname -r # Output: 6.18.8-current-rockchip64 ``` 5. Check available headers: ```bash apt policy linux-headers-current-rockchip64 ``` ## Actual Behavior - Installed image packages: ``` linux-image-current-rockchip64 26.2.1 [installed,local] linux-dtb-current-rockchip64 26.2.1 [installed,local] armbian-bsp-cli-rock-3a-current 26.2.1 [installed] ``` - `apt policy` output for headers: ``` linux-headers-current-rockchip64: Installed: (none) Candidate: 25.11.2 Version table: 25.11.2 500 500 http://<mirror>/armbian noble/main arm64 Packages ... (no 26.2.1 available) ``` ## Expected Behavior - The `linux-headers-current-rockchip64` package version **26.2.1** should be available in the `current` branch repository, matching the kernel shipped in the image. - Alternatively, the image should ship with packages that are already published and synchronized in the public repository. ## Impact - Users cannot install DKMS modules (ZFS, VirtualBox, WiFi drivers, etc.). - Development workflows requiring kernel headers are blocked. - Confusion for users performing a "clean install" who expect a consistent system. ## System Information - **Board:** Radxa Rock 3A - **Armbian version:** 26.2.1 (from image filename/release) - **Kernel:** 6.18.8-current-rockchip64 - **APT branch:** `current` - **Distribution:** Ubuntu Noble (24.04) - **Mirrors tested:** - `http://mirrors.tuna.tsinghua.edu.cn/armbian` - `http://mirror.yandex.ru/mirrors/armbian/apt` - `http://apt.armbian.com` (redirector) ## Possible Causes (hypothesis) 1. **Publishing race condition:** The image was built after `linux-image-26.2.1` was compiled but before `linux-headers-26.2.1` was published to the public repository. 2. **Branch mislabeling:** Version 26.2.1 may have been moved to `edge` after the image was built, but the image metadata was not updated. 3. **Mirror sync delay:** The master repository has the package, but mirrors have not yet synchronized (though multiple mirrors were tested over several days).