Thank you very much Nobuhiro. I can confirm that the newly added btattach command works as intended in your bluez (5.40-1~exp0) experimental package. It allows me to run the following command manually to enable the Bluetooth chipset on my Lenovo ThinkPad 8 tablet: $ btattach --bredr /dev/ttyS1 -P bcm
However, compared to some existing USB-based Bluetooth dongles, the Bluetooth stack is not enabled automatically at boot time yet on that setup. I guess the btattach command needs to be plugged with other parts of the system as well? To answer fully the original Bug report and its second part "how to configure btattach in a way that it will enable such Bluetooth chipsets directly at boot time?", should this report remain open? Or would you prefer me to open a separate one? It is unclear to me how Bluetooth dongles are enabled automatically upon detection so if you prefer a new Bug report, I would appreciate to get some hints to find which component in the system (BlueZ, another part) needs to be modified to take benefit of this new btattach command. Thanks a lot, Jérôme
