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So I got the log with armbianmonitor -u http://ix.io/SMr 4 mar boot: [ 9422.035588] usb 3-1: USB disconnect, device number 2 [ 9422.618182] usb 3-1: new full-speed USB device number 3 using ohci-platform [ 9423.100066] usb 3-1: New USB device found, idVendor=0a12, idProduct=0001 [ 9423.100081] usb 3-1: New USB device strings: Mfr=0, Product=2, SerialNumber=0 [ 9423.100091] usb 3-1: Product: BT2.0 [10894.702587] usb 3-1: USB disconnect, device number 3 [10895.292545] usb 3-1: new full-speed USB device number 4 using ohci-platform [10895.775054] usb 3-1: New USB device found, idVendor=0a12, idProduct=0001 [10895.775073] usb 3-1: New USB device strings: Mfr=0, Product=2, SerialNumber=0 [10895.775083] usb 3-1: Product: BT2.0 [13759.620173] usb 3-1: USB disconnect, device number 4 [13760.195726] usb 3-1: new full-speed USB device number 5 using ohci-platform [13760.678008] usb 3-1: New USB device found, idVendor=0a12, idProduct=0001 [13760.678018] usb 3-1: New USB device strings: Mfr=0, Product=2, SerialNumber=0 [13760.678024] usb 3-1: Product: BT2.0 [14830.486566] usb 3-1: USB disconnect, device number 5 [47722.111511] zram: Removed device: zram0 [47722.134578] zram: Removed device: zram1 the Bluetooth stays online for about 4/5 days. Yesterday evening I restart the 123solar application and all was working fine. This morning I found no usb Bluetooth adapter (no device in the lsusb output). I tried to reboot bananapi from command line with no success: no device even after reboot. After unplug then reconnect the usb adapter all working ok. The relevant logs are from 4 march to 5 march (this morning).

The only difference in the usb power between orange pi pc and banana ( if i'm not wrong) is that banana has a step up converter (axp209). well , i'll try to test another psu..... or bypass directly the axp209 Could you suggest me a good class 1 bluetooth fully compatible with banana pi ? the actual bluetooth (used now in orange pi and fully working) Bus 007 Device 002: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode) Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 224 Wireless bDeviceSubClass 1 Radio Frequency bDeviceProtocol 1 Bluetooth bMaxPacketSize0 64 idVendor 0x0a12 Cambridge Silicon Radio, Ltd idProduct 0x0001 Bluetooth Dongle (HCI mode) bcdDevice 19.58 iManufacturer 0 iProduct 0 iSerial 0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 177 bNumInterfaces 2 bConfigurationValue 1 iConfiguration 0 bmAttributes 0x80 (Bus Powered) MaxPower 100mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 3 bInterfaceClass 224 Wireless bInterfaceSubClass 1 Radio Frequency bInterfaceProtocol 1 Bluetooth iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 3 Transfer Type Interrupt Synch Type None Usage Type Data wMaxPacketSize 0x0010 1x 16 bytes bInterval 1 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x02 EP 2 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 1 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x82 EP 2 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0040 1x 64 bytes bInterval 1 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 0 bNumEndpoints 2 bInterfaceClass 224 Wireless bInterfaceSubClass 1 Radio Frequency bInterfaceProtocol 1 Bluetooth iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x03 EP 3 OUT bmAttributes 1 Transfer Type Isochronous Synch Type None Usage Type Data wMaxPacketSize 0x0000 1x 0 bytes bInterval 1 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x83 EP 3 IN bmAttributes 1 Transfer Type Isochronous Synch Type None Usage Type Data wMaxPacketSize 0x0000 1x 0 bytes bInterval 1 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 1 bNumEndpoints 2 bInterfaceClass 224 Wireless bInterfaceSubClass 1 Radio Frequency bInterfaceProtocol 1 Bluetooth iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x03 EP 3 OUT bmAttributes 1 Transfer Type Isochronous Synch Type None Usage Type Data wMaxPacketSize 0x0009 1x 9 bytes bInterval 1 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x83 EP 3 IN bmAttributes 1 Transfer Type Isochronous Synch Type None Usage Type Data wMaxPacketSize 0x0009 1x 9 bytes bInterval 1 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 2 bNumEndpoints 2 bInterfaceClass 224 Wireless bInterfaceSubClass 1 Radio Frequency bInterfaceProtocol 1 Bluetooth iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x03 EP 3 OUT bmAttributes 1 Transfer Type Isochronous Synch Type None Usage Type Data wMaxPacketSize 0x0011 1x 17 bytes bInterval 1 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x83 EP 3 IN bmAttributes 1 Transfer Type Isochronous Synch Type None Usage Type Data wMaxPacketSize 0x0011 1x 17 bytes bInterval 1 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 3 bNumEndpoints 2 bInterfaceClass 224 Wireless bInterfaceSubClass 1 Radio Frequency bInterfaceProtocol 1 Bluetooth iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x03 EP 3 OUT bmAttributes 1 Transfer Type Isochronous Synch Type None Usage Type Data wMaxPacketSize 0x0019 1x 25 bytes bInterval 1 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x83 EP 3 IN bmAttributes 1 Transfer Type Isochronous Synch Type None Usage Type Data wMaxPacketSize 0x0019 1x 25 bytes bInterval 1 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 4 bNumEndpoints 2 bInterfaceClass 224 Wireless bInterfaceSubClass 1 Radio Frequency bInterfaceProtocol 1 Bluetooth iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x03 EP 3 OUT bmAttributes 1 Transfer Type Isochronous Synch Type None Usage Type Data wMaxPacketSize 0x0021 1x 33 bytes bInterval 1 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x83 EP 3 IN bmAttributes 1 Transfer Type Isochronous Synch Type None Usage Type Data wMaxPacketSize 0x0021 1x 33 bytes bInterval 1 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 5 bNumEndpoints 2 bInterfaceClass 224 Wireless bInterfaceSubClass 1 Radio Frequency bInterfaceProtocol 1 Bluetooth iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x03 EP 3 OUT bmAttributes 1 Transfer Type Isochronous Synch Type None Usage Type Data wMaxPacketSize 0x0031 1x 49 bytes bInterval 1 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x83 EP 3 IN bmAttributes 1 Transfer Type Isochronous Synch Type None Usage Type Data wMaxPacketSize 0x0031 1x 49 bytes bInterval 1 Device Status: 0x0000 (Bus Powered)

Thank you vlad59 added rmmod sun4i_gpadc_iio rmmod sun4i_gpadc in /etc/rc.local and now kworker cpu usage has gone. Now for the bluetooth i will try to make a bypass cable : the +5v from power supply is conneted directly to the usb bluetooth dongle...

Hi, just installed Armbian 5.38 mainline (both debian server or Ubuntu server fresh installation). There are two processs eating cpu (kworker), and I read some other users have the same issue, but there is a solution? Other problem: I use this board with Bluetooth dongle to monitor my solar plant. Sometimes Bluetooth dongle disappear from lsusb or hcitool scan tell me device is busy with no reason, just unplug and reconnect usb dongle and all restart to work again (tried with two different Bluetooth dongle, this dongle works with no problem at all in another orange pi pc, no disconnection or disappear). The power supply is the same for both orange pi pc and orange pi 5v 2A. To power banana pi I used first standard microusb connector and then sata power connector directly to power the the board (read about connector power issue). This evening I will add the missing armbianmonitor -u output when Bluetooth is ok an when Bluetooth is not working.