Somewhat, in the resume stage, bluez has trouble to initialise the bluetooth adapter.
I put modified bluez package (version 4.96-0ubuntu5~kengyu2) in my ppa (https://launchpad.net/~lexical/+archive/bluez/) for test.
It contains a workaround/patch to force the initialisation. And it makes the bluetooth works on my Latitude 2110 (the only similar Dell I can approach) after the resume.
But it would be a better idea to take more effort inspecting the real cause.
Somewhat, in the resume stage, bluez has trouble to initialise the bluetooth adapter.
I put modified bluez package (version 4.96-0ubuntu5~ kengyu2) in my ppa (https:/ /launchpad. net/~lexical/ +archive/ bluez/) for test.
It contains a workaround/patch to force the initialisation. And it makes the bluetooth works on my Latitude 2110 (the only similar Dell I can approach) after the resume.
But it would be a better idea to take more effort inspecting the real cause.