Hi Dr Nukular: You could run "btmon -w btsnoop.log" to capture the HCI logs, have your devices connected, let them idle for a while, and observe which side terminates the connection. Also please make sure if you use the same peripheral devices when you compare the re-connection latency before and after you upgrade kernel/system. Bluetooth classic mouse/keyboard work differently from BLE mouse/keyboard. When a classic bluetooth device disconnects, its input node will be removed from kernel. Next time when reconnecting, it needs to create its node again in kernel. On the other hand, when a BLE device disconnects, its input node remains. Hence, a BLE device is supposed to be a bit faster to reconnect. Joseph On Tue, Apr 10, 2018 at 2:06 AM, Dr Nukular <dr.nukular@xxxxxxxxxx> wrote: > Hi Joseph, > > > Thanks for the reply. Not sure, but that might be the case, however this > issue started after a kernel / system update. Does that mean that before the > update the system was ignoring the power saving mode of that device? In that > case what changed exactly? > > > Fedora 27. kernel 4.15.14. gnome-shell 3.26.2 gnome-bluetooth 3.26.1. > > ________________________________ > Von: Joseph Hwang <josephsih@xxxxxxxxxx> > Gesendet: Montag, 9. April 2018 04:51:14 > An: Dr Nukular > Cc: linux-bluetooth@xxxxxxxxxxxxxxx > Betreff: Re: Bluetooth connection drops after idle time > > Hi Dr Nukular: > > As far as I know, it is the peripheral device that enters power > saving mode and disconnects. > > On Sat, Apr 7, 2018 at 2:32 PM, Dr Nukular <dr.nukular@xxxxxxxxxx> wrote: >> >> Bluetooth connection drops if the device, such as mouse or keyboard, is >> inactive for some time. Once the device is used again the bluetooth >> connection comes back on. This would not be an issue, if it wasn't for the >> time that it takes until the connection is re-established again. It is not >> responsive enough and interferes with the workflow, if you have to wait >> several seconds until you can use your device again, especially since you >> naturally expect an immediate response. >> >> If this is not a bug, then please enable a setting to disable that >> "feature" or improve the time by reducing it to a minimum to reconnect the >> device.-- >> To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" >> in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > > > -- > > Joseph Shyh-In Hwang > Email: josephsih@xxxxxxxxxx -- Joseph Shyh-In Hwang Email: josephsih@xxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
