ubuntu 18.04 systemd-udevd进程CPU占用特别高，禁用WiFi可以解决，如下：
执行
执行
执行
这种情况，一般都算由于
解决方法如下：
执行完成后，就可以不禁用无线网卡了。
执行
udevadm monitor ，不断输出如下信息：|
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UDEV [13756.376116] bind /devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0 (usb) KERNEL[13756.380620] bind /devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0 (usb) KERNEL[13756.381300] unbind /devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0 (usb) UDEV [13756.381674] unbind /devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0 (usb) KERNEL[13756.392446] bind /devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0 (usb) KERNEL[13756.393308] unbind /devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0 (usb) UDEV [13756.393898] bind /devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0 (usb) KERNEL[13756.397263] bind /devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0 (usb) KERNEL[13756.398300] unbind /devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0 (usb) UDEV [13756.398561] unbind /devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0 (usb) |
执行
dmesg 输出内容如下：|
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[13756.340234] usb 8-2.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71 [13756.346204] usb 8-2.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71 [13756.354209] usb 8-2.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71 [13756.362221] usb 8-2.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71 [13756.367210] usb 8-2.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71 [13756.375214] usb 8-2.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71 [13756.381236] usb 8-2.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71 [13756.393229] usb 8-2.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71 [13756.398213] usb 8-2.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71 [13756.407212] usb 8-2.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71 [13756.413235] usb 8-2.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71 [13756.425200] usb 8-2.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71 [13756.430295] usb 8-2.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71 [13756.438214] usb 8-2.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71 [13756.443217] usb 8-2.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71 [13756.454226] usb 8-2.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71 |
执行
sudo /lib/systemd/systemd-udevd -D ,会发现持续输出如下信息：|
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RUN 'hid2hci --method=dell --devpath=%p' /lib/udev/rules.d/97-hid2hci.rules:11 starting 'hid2hci --method=dell --devpath=/devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0' seq 5913 queued, 'bind' 'usb' 'hid2hci --method=dell --devpath=/devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0'(err) 'error: switching device '/sys//devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0' failed.' seq 5914 queued, 'unbind' 'usb' Process 'hid2hci --method=dell --devpath=/devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0' failed with exit code 1. seq 5893 processed seq 5894 running IMPORT builtin 'hwdb' /lib/udev/rules.d/50-udev-default.rules:14 RUN 'hid2hci --method=dell --devpath=%p' /lib/udev/rules.d/97-hid2hci.rules:11 Process '/usr/sbin/obex-check-device 413c 8156' failed with exit code 1. RUN 'VBoxCreateUSBNode.sh $major $minor $attr{bDeviceClass} vboxusers' /lib/udev/rules.d/60-virtualbox.rules:2 IMPORT builtin 'path_id' /lib/udev/rules.d/71-seat.rules:51 RUN 'uaccess' /lib/udev/rules.d/73-seat-late.rules:17 handling device node '/dev/bus/usb/008/017', devnum=c189:912, mode=0660, uid=0, gid=46 set permissions /dev/bus/usb/008/017, 020660, uid=0, gid=46 creating symlink '/dev/char/189:912' to '../bus/usb/008/017' starting 'hid2hci --method=dell --devpath=/devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0' starting 'VBoxCreateUSBNode.sh 189 912 e0 vboxusers' seq 5915 queued, 'bind' 'usb' 'hid2hci --method=dell --devpath=/devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0'(err) 'error: switching device '/sys//devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0' failed.' seq 5916 queued, 'unbind' 'usb' Process 'hid2hci --method=dell --devpath=/devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0' failed with exit code 1. seq 5894 processed 'VBoxCreateUSBNode.sh 189 912 e0 vboxusers'(err) '/lib/udev/VBoxCreateUSBNode.sh: 35: test: Illegal number: e0' seq 5895 running RUN 'hid2hci --method=dell --devpath=%p' /lib/udev/rules.d/97-hid2hci.rules:11 starting 'hid2hci --method=dell --devpath=/devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0' seq 5917 queued, 'bind' 'usb' 'hid2hci --method=dell --devpath=/devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0'(err) 'Can't claim interface: Device or resource busy (16)' 'hid2hci --method=dell --devpath=/devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0'(err) 'error: switching device '/sys//devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0' failed.' Process 'hid2hci --method=dell --devpath=/devices/pci0000:00/0000:00:1d.2/usb8/8-2/8-2.2/8-2.2:1.0' failed with exit code 1. |
这种情况，一般都算由于
Dell Wireless 370 Bluetooth 或者 Dell Wireless 1397 WLAN 驱动导致的，如下：
解决方法如下：
|
1 |
$ sudo rm -rf /lib/udev/rules.d/97-hid2hci.rules |
执行完成后，就可以不禁用无线网卡了。