I just noticed I can no longer use bluetooth with the 4.14.15 kernel. This laptop has a shared bluetooth and WiFi mini card, which has never worked properly (see attached hardware details).
Although MWindows has no problem, in Linux I have to disable WiFi when I need to use bluetooth! O_o Anyway, I now discovered that bluetooth won't work and /lib/systemd/systemd- udevd --daemon is pegged at 100% of CPU time. Switching off the mini-card using a keyboard button does not stop udevd from running hot. It just drops from 100% to 45% until I kill the process manually. udevadm monitor shows: KERNEL[281.040708] bind /devices/pci0000:00/0000:00:1d.0/ usb2/2-1/2-1.6/2-1.6.2/2-1.6.2:1.0 (usb) KERNEL[281.040855] unbind /devices/pci0000:00/0000:00:1d.0/ usb2/2-1/2-1.6/2-1.6.2/2-1.6.2:1.0 (usb) UDEV [281.041192] unbind /devices/pci0000:00/0000:00:1d.0/ usb2/2-1/2-1.6/2-1.6.2/2-1.6.2:1.0 (usb) KERNEL[281.044485] bind /devices/pci0000:00/0000:00:1d.0/ usb2/2-1/2-1.6/2-1.6.2/2-1.6.2:1.0 (usb) KERNEL[281.044596] unbind /devices/pci0000:00/0000:00:1d.0/ usb2/2-1/2-1.6/2-1.6.2/2-1.6.2:1.0 (usb) UDEV [281.044969] bind /devices/pci0000:00/0000:00:1d.0/ usb2/2-1/2-1.6/2-1.6.2/2-1.6.2:1.0 (usb) KERNEL[281.048056] bind /devices/pci0000:00/0000:00:1d.0/ usb2/2-1/2-1.6/2-1.6.2/2-1.6.2:1.0 (usb) KERNEL[281.048257] unbind /devices/pci0000:00/0000:00:1d.0/ usb2/2-1/2-1.6/2-1.6.2/2-1.6.2:1.0 (usb) UDEV [281.048534] unbind /devices/pci0000:00/0000:00:1d.0/ usb2/2-1/2-1.6/2-1.6.2/2-1.6.2:1.0 (usb) KERNEL[281.051754] bind /devices/pci0000:00/0000:00:1d.0/ usb2/2-1/2-1.6/2-1.6.2/2-1.6.2:1.0 (usb) KERNEL[281.051995] unbind /devices/pci0000:00/0000:00:1d.0/ usb2/2-1/2-1.6/2-1.6.2/2-1.6.2:1.0 (usb) non stop. Syslog does not show anything unusual. Has anyone noticed something similar? How do I troubleshoot this? -- Regards, Mick
# lsusb -v
Bus 002 Device 011: ID 413c:8156 Dell Computer Corp. Wireless 370 Bluetooth
Mini-card
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 224 Wireless
bDeviceSubClass 1 Radio Frequency
bDeviceProtocol 1 Bluetooth
bMaxPacketSize0 64
idVendor 0x413c Dell Computer Corp.
idProduct 0x8156 Wireless 370 Bluetooth Mini-card
bcdDevice 4.56
iManufacturer 1 Dell Computer Corp
iProduct 2 Dell Wireless 370 Bluetooth Mini-card
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 216
bNumInterfaces 4
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xe0
Self Powered
Remote Wakeup
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 0x82 EP 2 IN
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 0x02 EP 2 OUT
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 0x83 EP 3 IN
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 0x03 EP 3 OUT
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 0x83 EP 3 IN
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 0x03 EP 3 OUT
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 0x83 EP 3 IN
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 0x03 EP 3 OUT
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 0x83 EP 3 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0020 1x 32 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0020 1x 32 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 0x83 EP 3 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 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 0x83 EP 3 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0020 1x 32 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x04 EP 4 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0020 1x 32 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 254 Application Specific Interface
bInterfaceSubClass 1 Device Firmware Update
bInterfaceProtocol 0
iInterface 0
Device Firmware Upgrade Interface Descriptor:
bLength 7
bDescriptorType 33
bmAttributes 7
Will Not Detach
Manifestation Tolerant
Upload Supported
Download Supported
wDetachTimeout 5000 milliseconds
wTransferSize 64 bytes
can't get device qualifier: Resource temporarily unavailable
can't get debug descriptor: Resource temporarily unavailable
Device Status: 0x0001
Self Powered
[snip ...]
Bus 002 Device 008: ID 0a5c:4500 Broadcom Corp. BCM2046B1 USB 2.0 Hub (part of
BCM2046 Bluetooth)
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 9 Hub
bDeviceSubClass 0
bDeviceProtocol 0 Full speed (or root) hub
bMaxPacketSize0 8
idVendor 0x0a5c Broadcom Corp.
idProduct 0x4500 BCM2046B1 USB 2.0 Hub (part of BCM2046 Bluetooth)
bcdDevice 1.00
iManufacturer 1 Broadcom
iProduct 2 BCM2046B1
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 25
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xe0
Self Powered
Remote Wakeup
MaxPower 94mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9 Hub
bInterfaceSubClass 0
bInterfaceProtocol 0 Full speed (or root) hub
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 0x0001 1x 1 bytes
bInterval 255
Hub Descriptor:
bLength 9
bDescriptorType 41
nNbrPorts 3
wHubCharacteristic 0x0004
Ganged power switching
Compound device
Ganged overcurrent protection
bPwrOn2PwrGood 50 * 2 milli seconds
bHubContrCurrent 100 milli Ampere
DeviceRemovable 0x0e
PortPwrCtrlMask 0xff
Hub Port Status:
Port 1: 0000.0103 power enable connect
Port 2: 0000.0103 power enable connect
Port 3: 0000.0103 power enable connect
can't get device qualifier: Resource temporarily unavailable
can't get debug descriptor: Resource temporarily unavailable
Device Status: 0x0001
Self Powered
>From lshw:
=========
*-usb:1
description: USB controller
product: 5 Series/3400 Series Chipset USB2 Enhanced Host Controller
vendor: Intel Corporation
physical id: 1d
bus info: pci@0000:00:1d.0
version: 05
width: 32 bits
clock: 33MHz
capabilities: pm debug ehci bus_master cap_list
configuration: driver=ehci-pci latency=0
resources: irq:23 memory:f1005c00-f1005fff
*-usbhost
product: EHCI Host Controller
vendor: Linux 4.14.15-gentoo ehci_hcd
physical id: 1
bus info: usb@2
logical name: usb2
version: 4.14
capabilities: usb-2.00
configuration: driver=hub slots=3 speed=480Mbit/s
*-usb
description: USB hub
product: Integrated Rate Matching Hub
vendor: Intel Corp.
physical id: 1
bus info: usb@2:1
version: 0.00
capabilities: usb-2.00
configuration: driver=hub slots=8 speed=480Mbit/s
*-usb:0
description: Mouse
product: USB OPTICAL MOUSE
vendor: PIXART
physical id: 2
bus info: usb@2:1.2
version: 1.00
capabilities: usb-1.10
configuration: driver=usbhid maxpower=100mA speed=2Mbit/s
*-usb:1
description: USB hub
product: BCM2046B1
vendor: Broadcom
physical id: 6
bus info: usb@2:1.6
version: 1.00
capabilities: usb-2.00
configuration: driver=hub maxpower=94mA slots=3
speed=12Mbit/s
*-usb:0
description: Keyboard
product: Integrated Keyboard
vendor: Dell Computer Corp.
physical id: 1
bus info: usb@2:1.6.1
version: 1.00
capabilities: usb-2.00
configuration: driver=usbhid maxpower=2mA
speed=12Mbit/s
*-usb:1 UNCLAIMED
description: Mouse
product: Integrated Touchpad / Trackstick
vendor: Dell Computer Corp.
physical id: 2
bus info: usb@2:1.6.2
version: 1.00
capabilities: usb-2.00
configuration: maxpower=2mA speed=12Mbit/s
*-usb:2
description: Bluetooth wireless interface
product: Dell Wireless 370 Bluetooth Mini-card
vendor: Dell Computer Corp
physical id: 3
bus info: usb@2:1.6.3
version: 4.56
capabilities: bluetooth usb-2.00
configuration: driver=btusb maxpower=100mA
speed=12Mbit/s
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