LineageOS to offer seamless system updates
Android 7.0 Nougat has a special treat for Google Pixel and Google Pixel XL users, namely seamless updates. Thanks to this feature, users can use their devices while the OTA update process takes place and the only downtime occurs during the reboot that leads into the updated system.
Now, it looks like LineageOS would soon get seamless updates as well. According to XDA Developers, "A set of commits to the CMUpdater found in LineageOS points that this functionality will soon be available on the ROM." Unfortunately, the same source also reveals that not all LineageOS-compatible devices will get this feature. In fact, it looks like only Google Pixel and Google Pixel XL will get A/B style OTA updates.
The reason behind the lack of seamless updates on older devices is quite simple - "Older devices which were not launched with A/B style OTA support in their stock ROMs will lack the requisite partitions to support this new style of OTA." Although it has not been confirmed yet, it seems that the next nightly build of LineageOS will add seamless updates, so the public build should get it in the coming weeks as well.
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