Hi list, I have noticed that the bluetooth connection between my laptop (Intel 7260) and my headphones (Sennheiser Momentum Wirelless) is very unreliable. While under Windows 10 devices stay connected for hours on end, under Fedora 28 the connection is lost every few minutes at most. Often the connection will be reestablished only to be lost again. bluetoothd shows messages like: cze 29 21:31:13 snowball2 bluetoothd[3832]: Endpoint unregistered: sender=:1.145 path=/MediaEndpoint/A2DPSource cze 29 21:31:13 snowball2 bluetoothd[3832]: Endpoint unregistered: sender=:1.145 path=/MediaEndpoint/A2DPSink cze 29 21:31:13 snowball2 bluetoothd[3832]: Endpoint registered: sender=:1.145 path=/MediaEndpoint/A2DPSource cze 29 21:31:13 snowball2 bluetoothd[3832]: Endpoint registered: sender=:1.145 path=/MediaEndpoint/A2DPSink cze 29 21:31:39 snowball2 bluetoothd[3832]: /org/bluez/hci0/dev_00_1B_66_81_8D_76/fd5: fd(25) ready cze 29 21:33:02 snowball2 bluetoothd[3832]: Unable to get io data for Headset Voice gateway: getpeername: Transport endpoint is not connected (107) cze 29 21:33:02 snowball2 bluetoothd[3832]: Endpoint unregistered: sender=:1.145 path=/MediaEndpoint/A2DPSource cze 29 21:33:02 snowball2 bluetoothd[3832]: Endpoint unregistered: sender=:1.145 path=/MediaEndpoint/A2DPSink cze 29 21:33:03 snowball2 bluetoothd[3832]: Endpoint registered: sender=:1.145 path=/MediaEndpoint/A2DPSource cze 29 21:33:03 snowball2 bluetoothd[3832]: Endpoint registered: sender=:1.145 path=/MediaEndpoint/A2DPSink cze 29 21:33:31 snowball2 bluetoothd[3832]: /org/bluez/hci0/dev_00_1B_66_81_8D_76/fd6: fd(25) ready cze 29 21:35:38 snowball2 bluetoothd[3832]: Unable to get io data for Headset Voice gateway: getpeername: Transport endpoint is not connected (107) dmesg for the same period looks as follows: 2018-06-29T21:30:58,743292+02:00 Bluetooth: hci0: last event is not cmd complete (0x0f) 2018-06-29T21:31:12,613199+02:00 usb 2-1.4: USB disconnect, device number 8 2018-06-29T21:31:12,809196+02:00 usb 2-1.4: new full-speed USB device number 9 using ehci-pci 2018-06-29T21:31:12,889200+02:00 usb 2-1.4: New USB device found, idVendor=8087, idProduct=07dc, bcdDevice= 0.01 2018-06-29T21:31:12,889203+02:00 usb 2-1.4: New USB device strings: Mfr=0, Product=0, SerialNumber=0 2018-06-29T21:31:12,903435+02:00 Bluetooth: hci0: read Intel version: 3707100180012d0d2a 2018-06-29T21:31:12,903438+02:00 Bluetooth: hci0: Intel device is already patched. patch num: 2a 2018-06-29T21:31:13,002369+02:00 Bluetooth: hci0: last event is not cmd complete (0x0f) 2018-06-29T21:31:28,853543+02:00 Bluetooth: hci0: last event is not cmd complete (0x0f) 2018-06-29T21:31:39,625447+02:00 input: 00:1B:66:81:8D:76 as /devices/virtual/input/input31 2018-06-29T21:31:44,742251+02:00 Bluetooth: hci0: last event is not cmd complete (0x0f) 2018-06-29T21:32:00,746866+02:00 Bluetooth: hci0: last event is not cmd complete (0x0f) 2018-06-29T21:32:16,747075+02:00 Bluetooth: hci0: last event is not cmd complete (0x0f) 2018-06-29T21:32:32,746099+02:00 Bluetooth: hci0: last event is not cmd complete (0x0f) 2018-06-29T21:32:48,747212+02:00 Bluetooth: hci0: last event is not cmd complete (0x0f) 2018-06-29T21:33:02,403071+02:00 usb 2-1.4: USB disconnect, device number 9 2018-06-29T21:33:02,595275+02:00 usb 2-1.4: new full-speed USB device number 10 using ehci-pci 2018-06-29T21:33:02,675493+02:00 usb 2-1.4: New USB device found, idVendor=8087, idProduct=07dc, bcdDevice= 0.01 2018-06-29T21:33:02,675502+02:00 usb 2-1.4: New USB device strings: Mfr=0, Product=0, SerialNumber=0 2018-06-29T21:33:02,691213+02:00 Bluetooth: hci0: read Intel version: 3707100180012d0d2a 2018-06-29T21:33:02,691216+02:00 Bluetooth: hci0: Intel device is already patched. patch num: 2a 2018-06-29T21:33:02,791228+02:00 Bluetooth: hci0: last event is not cmd complete (0x0f) 2018-06-29T21:33:18,854324+02:00 Bluetooth: hci0: last event is not cmd complete (0x0f) 2018-06-29T21:33:31,481782+02:00 input: 00:1B:66:81:8D:76 as /devices/virtual/input/input32 2018-06-29T21:33:34,742175+02:00 Bluetooth: hci0: last event is not cmd complete (0x0f) 2018-06-29T21:35:37,864703+02:00 usb 2-1.4: USB disconnect, device number 10 2018-06-29T21:35:38,056428+02:00 usb 2-1.4: new full-speed USB device number 11 using ehci-pci 2018-06-29T21:35:38,140706+02:00 usb 2-1.4: New USB device found, idVendor=8087, idProduct=07dc, bcdDevice= 0.01 2018-06-29T21:35:38,140712+02:00 usb 2-1.4: New USB device strings: Mfr=0, Product=0, SerialNumber=0 2018-06-29T21:35:38,155840+02:00 Bluetooth: hci0: read Intel version: 3707100180012d0d2a 2018-06-29T21:35:38,155843+02:00 Bluetooth: hci0: Intel device is already patched. patch num: 2a I am not sure where to look further. Does it look like an issue with pulseaudio, or a deeper problem with linux bluetooth stack? Thanks for your input in advance! Best regards, Julian
