Restarting ubuntu doesn't help either. The only thing that helped me is
"Remove device" and then set up again.
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https://bugs.launchpad.net/bugs/1870356
Title:
Can't connect to paired
Same issue here, Ubuntu 20.04. External bluetooth speakers stay in
"disconnected" mode in Bluetooth Settings, without a possibility to
connect (slider moves but immediately bounces back)
"sudo service bluetooth status" shows: connect error: Device or resource
busy (16)
Restarting bluetooth
*** This bug is a duplicate of bug 1742602 ***
https://bugs.launchpad.net/bugs/1742602
Update 1:
It looks like Dell Inspiron 15 indeed has some hybrid Intel/Radeon graphics but
it was not clear to me at the beginning.
Update 2:
After fresh install of Ubuntu 20.04 (kernel:
*** This bug is a duplicate of bug 1742602 ***
https://bugs.launchpad.net/bugs/1742602
I am affected as well. I am running Ubuntu 18.04 LTS on Dell Inspiron 15
with external monitor over HDMI. The screen randomly goes blank for
couple of seconds, then returns to normal. It happens
