There has yet to be an official build of LineageOS 16 released yet, but the team has been incredibly hard at work to bring everything up. This has led to some devices getting unofficial ports of early LOS 16 builds and the Xiaomi Mi A1 has been one which has been lucky enough to receive it. In a thread for a port from XDA Senior Member abhishek987 and XDA Forum Moderator / Recognized Developer flex1911, we were informed of an experimental version for those who want to take a chance on something new.
This different build for the Mi A1 includes a fully functional 4.9 kernel port (which was done by flex1911) but again, is said to be experimental and needs testing. A newer version of a kernel for a device rarely happens and is a big deal as it comes with much newer drivers, security improvements, and longevity. Not only that, but this special build also has the proper EAS implemented by Qualcomm for the Snapdragon 625 chipset. The download can be found in the post within the thread and there’s also a link to a Display Power Fix (again, this is an experimental build) for those who want to test it out.
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