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So, I've got a problem where Bluetooth will just disappear from everywhere. No icon in system tray, settings say that no Bluetooth adapters have been found, begging me to connect one. The problem is that my laptop (HP pavilion dv7) has bluetooth built-in and bluetooth worked just fine about 15 minutes ago. lsusb also detects bluetooth adapter and so does my cellphone, which keeps beeping really loud every 30 seconds as it fails to connect to my laptop. (If I put laptop to sleep, beeping stops. It also stops when I went away from laptop — far enough to be out of BT range — therefore Bluetooth adapter in my laptop is even on and running and gets detected by my phone).
Is there any way to fix this problem (short of rebooting the system, which does fix the problem but takes fairly long too)? Qt: 4.8.3 KDE Development Platform: 4.10.00 (Kubuntu 12.10) |
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Can you check the output of the "dmesg" command to see if the kernel is giving any reason as to why the Bluetooth device is not being found?
Perhaps bluetoothd is crashing, which is a service used by the KDE Bluetooth programs (Bluedevil) to interface with your bluetooth adapter.
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I've just done some more "testing," turns out that this issue occurs about every other time I put my laptop into sleep mode.
There is also one more relevant thing — I've got blueProximity installed so my laptop gets locked as soon as my cellphone is out of range. Despite that KDE detects no bluetooth adapters and that phone constantly fails to establish connection, this program still works and will lock screen when cellphone gets out of range (or when I disable bluetooth on the phone). I've been using that program over 3 months and had no problems with it. (Problems with bluetooth first started earlier this week.) dmesg does seem to complain about it:
Where I assume btusb refers to bluetooth device. Full dmesg below: atkbd serio0 errors are there before 'bluetooth adapter not visible' issue starts.
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Interesting. The dmesg message is definitely indicative that the 'btusb' driver does not have any suspend handling in it from what I can tell.
However, given that Blueproximity is working, I suspect the bluetooth adapter itself is still functioning. Can you check to see if bluetoothd is running before and after suspending the computer?
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