i have lenovo laptop .my laptop bluetooth hardware is not working.please nd me the reason and soultions
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  1. Can you give us some more details?
  2. You could try to see if there's any mention of adapters in the kernel boot messages with something like
    dmesg|grep -iE "b(lue|t)"

    and see if it lists anything interesting.

    The other thing, if that doesn't turn up anything, is to look for unknown devices, usually USB devices, so you could check a few listing like
    dmesg|grep -i unknown
    //or, more directly

    Post some findings here when you get them.
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