Hi, I've upgraded my Distro Ubuntu from 14.04 (Kernel 3.13.0) to 16.04 (Kernel 4.4.0). Since the upgrade the battery indicator LEDs on my Logitech Performance MX Mouse light up about every 60 seconds. Depending on the charging level 1, 2 or 3 LEDs light up green. I've used the usbmon module to capture the usb traffic and when the LEDs light up the following is captured by "cat /sys/kernel/debug/usb/usbmon/2u": ffff8807a16ddd80 290929349 S Co:2:009:0 s 21 09 0210 0002 0007 7 = 10018107 000000 ffff8807a16ddd80 290929492 C Co:2:009:0 0 7 > ffff88074c55b180 290932022 C Ii:2:009:3 0:2 7 = 10018f81 070900 ffff88074c55b180 290932033 S Ii:2:009:3 -115:2 32 < ffff8807f4332540 296834836 S Co:2:009:0 s 21 09 0210 0002 0007 7 = 10028107 000000 ffff8807f4332540 296835012 C Co:2:009:0 0 7 > ffff88074c55b180 298689874 C Ii:2:009:3 0:2 7 = 10028107 050000 ffff88074c55b180 298689892 S Ii:2:009:3 -115:2 32 < Here is the output from "lsusb -v" for the Logitech Unifying Receiver in use: Bus 002 Device 009: ID 046d:c52b Logitech, Inc. Unifying Receiver Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 8 idVendor 0x046d Logitech, Inc. idProduct 0xc52b Unifying Receiver bcdDevice 12.01 iManufacturer 1 Logitech iProduct 2 USB Receiver iSerial 0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 84 bNumInterfaces 3 bConfigurationValue 1 iConfiguration 4 RQR12.01_B0019 bmAttributes 0xa0 (Bus Powered) Remote Wakeup MaxPower 98mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 1 bInterfaceClass 3 Human Interface Device bInterfaceSubClass 1 Boot Interface Subclass bInterfaceProtocol 1 Keyboard iInterface 0 HID Device Descriptor: bLength 9 bDescriptorType 33 bcdHID 1.11 bCountryCode 0 Not supported bNumDescriptors 1 bDescriptorType 34 Report wDescriptorLength 59 Report Descriptors: ** UNAVAILABLE ** Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0008 1x 8 bytes bInterval 8 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 0 bNumEndpoints 1 bInterfaceClass 3 Human Interface Device bInterfaceSubClass 1 Boot Interface Subclass bInterfaceProtocol 2 Mouse iInterface 0 HID Device Descriptor: bLength 9 bDescriptorType 33 bcdHID 1.11 bCountryCode 0 Not supported bNumDescriptors 1 bDescriptorType 34 Report wDescriptorLength 148 Report Descriptors: ** UNAVAILABLE ** Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x82 EP 2 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0008 1x 8 bytes bInterval 2 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 2 bAlternateSetting 0 bNumEndpoints 1 bInterfaceClass 3 Human Interface Device bInterfaceSubClass 0 No Subclass bInterfaceProtocol 0 None iInterface 0 HID Device Descriptor: bLength 9 bDescriptorType 33 bcdHID 1.11 bCountryCode 0 Not supported bNumDescriptors 1 bDescriptorType 34 Report wDescriptorLength 98 Report Descriptors: ** UNAVAILABLE ** Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x83 EP 3 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0020 1x 32 bytes bInterval 2 Device Status: 0x0000 (Bus Powered) If you have any idea how to disable or fix that behavior please let me know. If you need further information to debug this properly please also let me know. Thanks for your efforts! Best regards, Johannes -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html