Hi Andreas, It is a valid point, so I double checked - Dell Latitude E7240 does support Bluetooth 4 (LE / Smart) - Linux kernel has support since Linux 3.4 and later through BlueZ 5.0 rgds Paul On Wed, Apr 13, 2016 at 4:48 PM, Andreas Mahel <andreas@mahel.net> wrote:

On 13.04.2016 16:12, Paul Gonin wrote:

...

Hi,

I have a Logitech MX Anywhere 2 mouse that can be used in USB (Unifying) and Bluetooth mode.

Most of the time I use this mous in USB mode (when laptop is on dock) but I occasionally use it in Bluetooth mode (when using lapyop in mobility)

I now have an issue with this mouse on bluetooth mode following recent updates. I can't say for sure but I would say since TW upgraded to kernel 4.5

It works fine for a few minutes, but stop working and needs bluetooth stack restarted.

In system log (journalctl), when the mouse stop working I can see quite a few BT related errors: kernel: Bluetooth: hci0 command 0x2005 tx timeout

Any idea ? Should I report as bug ?

thanks Paul

I don't have that much experience in Bluetooth on Linux, so my input may be way off. However, I have experienced the same behavior with a Logitech MX Anywhere 2 mouse and Windows 7. There the reason was the fact that Win7 does not support Bluetooth Smart / LE / v4.0.

So the question to the more Bluetooth knowledgeable on this list: which version of Bluetooth is actually supported in TW in general and on Paul's machine in particular? And could it possibly also be that the laptop just does not support BT v4.0?

/Andreas

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