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I upgraded my system to ubuntu 17.10. I could turn on my bluetooth and use it normally. But today, I don't know why and how, I can't turn it on. In the top-right I can only press Turn Off open Bluetooth Settings. The Turn Off button doesn't toggle even if I press it. Even when I open the Bluetooth Settings I can't turn it on from there.

Does anybody have a solution?

Screenshot1

Screenshot2(settings)

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    I know a little French (thanks to the ex-wife)... "Pas" signals a negative and "trouvé" is a form of the verb "to find" so, is it saying "not found" or something? If so, it can be hardware. If it happened suddenly it probably is. – user692175 Nov 18 '17 at 23:49
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    Is there a hardware switch on your computer to turn off Bluetooth and/or other RF activity? You might have accidentally switched it off. – Pierre-Antoine Mar 24 '18 at 11:07
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I got the same problem today, and found out the problem was related to rfkill. So I tried

$ rfkill list 
0: hci0: Bluetooth
    Soft blocked: yes   <-- ah ah!
    Hard blocked: no
(...)

The command rfkill unblock 0 did the trick.

That being said, I have no idea why all of a sudden I ended up in that state... (or why the UI is not able to detect/fix that problem on its own).

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  • I had the same problem, but for me this solution doesn't work because I have neither soft or hard block in rfkill. The only solution I found was restarting my computer. – patapouf_ai Aug 18 '20 at 14:16

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