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I am running latest Arch Linux and GNOME desktop.

I sometimes put my computer to sleep, but after resuming I find that my bluetooth does not work. I can't turn it on from gnome system settings.
I tried running sudo modprobe btusb bluetooth couple of times and also tried restarting bluetooth service sudo systemctl restart bluetooth.service and failed. I don't get any error on running those commands.

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  • At least, systemd tells you some reason why the service could not be started, e.g. the exit code. This should also be in the journal - the relevant except would be helpful. Commented Sep 20, 2016 at 12:49
  • @MartinNyolt systemd wouldn't show error, according to systemd there is nothing wrong with bluetooth service but still bluetooth won't work Commented Sep 21, 2016 at 7:17
  • Sorry, then I misunderstood you saying that restarting the service failed - I thought you meant the actual systemctl restart failed. But the essence of my previous comment is the same: without more information from you, we cannot do much. What is the output of bluetoothctl, for instance? Is there any error message when turning on the power with bluetoothctl? Does dmesg say anything? Please give more diagnostic. Commented Sep 21, 2016 at 9:08
  • @MartinNyolt here is the link to some outputs. systemctl, dmesg,bluetoothctl don't give any kind of error, I checked all of them when my bluetooth wasn't starting Commented Oct 3, 2016 at 6:30
  • Check rfkill list all as it looks like bluetooth may have been disabled Commented Jan 12, 2017 at 22:58

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I had this problem, I have the Atheros AR9485. It seems that you have to enable bluetooth coexistence manually. In this website https://wireless.wiki.kernel.org/en/users/drivers/ath9k/btcoex It says that the bluetooth card is AR3012. The only way I solved it was doing (I added this to a systemd sleep script)

modprobe -r ath9k && modprobe -r ath3k && modprobe ath9k btcoex_enable=1 && modprobe ath3k
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  • I am not sure if this answer will help me (or anybody else) since the issue was fixed for my laptop in later versions of Linux kernel. Commented Mar 3, 2019 at 9:49

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