The issue can also be reproduced on my 14.04, by adding some prints in
the source code I found it's cause by a logic trap:
1. we click the switch in the u-c-c bt panel to turn on the bt
2. in the widget's "notify::active" callback it set the BT state to unblocked
3. the BT "state-changed" callback is triggered with {state: unblocked,
powered: off}, in this callback it will update the UI
4. in such a case step 2 is triggered again but this time it set the BT state
to blocked.
So after a long repetition the final status is BT is turned off again.
Actually I'm wondering if it will run into an endless dead loop under
special condition.
Anyway in my side I could fix, or maybe only workaround, the issue with
the attached patch, it will temporarily block the widget's
"notify::active" callback in the bt killswitch callbacks, so we won't
run into step 2 after step 3.
** Patch added: "block-power-callback-unless-its-triggered-by-user.patch"
https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1248720/+attachment/4306992/+files/block-power-callback-unless-its-triggered-by-user.patch
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https://bugs.launchpad.net/bugs/1248720
Title:
Bluetooth ON/OFF button switches OFF automatically
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