• Possibly linux@lemmy.zip
    link
    fedilink
    English
    arrow-up
    8
    ·
    8 months ago

    Fun fact off doesn’t mean off on modern Android. When you plug in your device and see a battery percentage that means there is software running on the device

      • Possibly linux@lemmy.zip
        link
        fedilink
        English
        arrow-up
        1
        arrow-down
        4
        ·
        edit-2
        8 months ago

        Actually I don’t believe it is. That part of the system is part of the OS image. I believe its how google tracks the Pixel 8

        • Dandroid@sh.itjust.works
          link
          fedilink
          English
          arrow-up
          13
          ·
          8 months ago

          I used to be an Android device developer back in the Lollipop days. I compiled the various images myself, including the bootloader, recovery, and the Android OS. I can say with 100% certainty that at least back in the Lollipop days, and at least on the vast, vast majority of devices (a device could theoretically change this, and I don’t know everything about every device ever released), the battery percentage that shows up when the phone is off is part of the bootloader, not Android. It’s a separate image entirely.

          • JDubbleu@programming.dev
            link
            fedilink
            English
            arrow-up
            3
            arrow-down
            1
            ·
            8 months ago

            I’ve rooted many android phones including modern ones. Flashing the bootloader/recovery without the OS always changed the charging animation in the off state in my experience. Can’t say this is how all Androids work, but I’ve never encountered one that didn’t behave this way.

            • Dandroid@sh.itjust.works
              link
              fedilink
              English
              arrow-up
              3
              ·
              8 months ago

              You most likely are flashing the bootloader, recovery, and OS all in one step. They can be combined into one image and all flashed at once. I doubt the Android bootloader would be able to boot Linux, but tbh, that’s not my area of expertise, so I could be wrong.

        • skuzz@discuss.tchncs.de
          link
          fedilink
          English
          arrow-up
          4
          ·
          edit-2
          8 months ago

          I know how it is. Used to work on phone chipsets. That being said, I have no idea how pixel 8 is doing this, but likely the Bluetooth chipset has a mode it can go into to behave like AirTags and just pulse out a BTLE beacon occasionally with both the main OS and sub-OSes turned off and power just being trickled to VCC on the BT chip.

          Edit: apologies, didn’t mean to sound so curt. Tl;dr: I know how bootloaders run to allow battery charge while off, not sure how pixel 8 is doing their magic-to-be but have a good theory.