BTHUSB event ID 34
"The local adapter does not support an important Low Energy controller state to support peripheral mode..."
This pops up as a warning in Event Viewer every time the 3148 laptop is booted or awakened from sleep.
This fresh install included basic BlueTooth drivers, and that feature works reasonably well.
However, install of a Dell tech's recommended http://dell.to/2uZNhBh 1708 BT package, while it added a BT control panel, degraded audio. The effect was loosely similar to a flanging - watery and phase distorted. The update was uninstalled.
Disabling various BT items in Device Manager doesn't banish the warning - and usually kills communication. When 1708 drivers were removed, BT speaker audio returned to normal.
As a further test, "Allow the computer to turn off this device to save power" has been disabled where available under Device Manager performance tabs for Bluetooth entries - to no effect.
BT works. and it's understood that the warning is benign. But can it be eliminated?