I am trying to use a pair of Sony WH-CH500 bluetooth headphones in headset mode with a Lenovo T480 laptop. They work perfectly fine in stereo headphone mode but the moment I enable the headset from the sound settings the audio cuts out completely.
The T480 has a wifi/bt combo Intel® Dual Band Wireless-AC 8265 chip.
These headphones obviously work with my phone and they work with a different Asus laptop. Perhaps what is really surprising is that I installed a trial version of IVT BlueSoleil software on the T480 and once I paired the headphones using BlueSoleil they work as expected: stereo headphones when listening to music and automatically switch to headset mode when I receive or make a Skype call.
The headphones work, the laptop's hardware is capable (otherwise it wouldn't work in BlueSoleil) so why don't they work without BlueSoleil software (which I can't use once the trial ends)?
I tried installing drivers from lenovo, drivers from intel, purged both and tried using whatever driver windows installed by default and no luck.