Gần đây tôi đã chuyển từ Kubfox 17.10 sang Kubfox 18.04 (cài đặt mới). Vấn đề là quá trình systemd-udevd
liên tục chạy và tiêu tốn 90 - 100% tải CPU. Sau khi mày mò khắp nơi với tất cả các thiết bị, tôi phát hiện ra rằng đó là do WiFi! Khi tôi bật WiFi, quá trình bắt đầu chạy và tải CPU lên tới 100%. Nhưng bất cứ khi nào tôi tắt WiFi, nó sẽ xuống không! Đây là top
kết quả khi WiFi được bật:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
338 root 20 0 94336 51744 3120 S 44.7 0.6 0:35.50 systemd-udevd
24957 root 20 0 67936 25248 2860 R 40.4 0.3 0:23.85 systemd-udevd
328 root 19 -1 150720 53068 52264 S 4.3 0.7 0:07.61 systemd-journal
và chạy: strace -p 338
làm cho đầu ra sau lặp đi lặp lại:
strace: Process 338 attached
strace: [ Process PID=338 runs in x32 mode. ]
strace: [ Process PID=338 runs in 64 bit mode. ]
epoll_wait(10, [{EPOLLIN, {u32=4010170080, u64=94544830289632}}, {EPOLLIN, {u32=4010060672, u64=94544830180224}}], 11, 0) = 2
clock_gettime(CLOCK_REALTIME, {tv_sec=1524848329, tv_nsec=484799898}) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=1045, tv_nsec=112300760}) = 0
clock_gettime(CLOCK_BOOTTIME, {tv_sec=1045, tv_nsec=112454363}) = 0
epoll_wait(10, [{EPOLLIN, {u32=4010170080, u64=94544830289632}}, {EPOLLIN, {u32=4010060672, u64=94544830180224}}], 11, 0) = 2
clock_gettime(CLOCK_REALTIME, {tv_sec=1524848329, tv_nsec=485376240}) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=1045, tv_nsec=112893238}) = 0
clock_gettime(CLOCK_BOOTTIME, {tv_sec=1045, tv_nsec=113047679}) = 0
recvmsg(7, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="", iov_len=0}], msg_iovlen=1, msg_control=[{cmsg_len=28, cmsg_level=SOL_SOCKET, cmsg_type=SCM_CREDENTIALS, cmsg_data={pid=24957, uid=0, gid=0}}], msg_controllen=32, msg_flags=0}, MSG_DONTWAIT) = 0
recvmsg(7, {msg_namelen=0}, MSG_DONTWAIT) = -1 EAGAIN (Resource temporarily unavailable)
sendmsg(3, {msg_name={sa_family=AF_NETLINK, nl_pid=-853365251, nl_groups=00000000}, msg_namelen=12, msg_iov=[{iov_base="libudev\0\376\355\312\376(\0\0\0(\0\0\0\315\0\0\0\5w\305\345\261\2Ge"..., iov_len=40}, {iov_base="ACTION=unbind\0DEVPATH=/devices/p"..., iov_len=205}], msg_iovlen=2, msg_controllen=0, msg_flags=0}, 0) = 245
epoll_wait(10, [{EPOLLIN, {u32=4010170080, u64=94544830289632}}], 11, 0) = 1
clock_gettime(CLOCK_REALTIME, {tv_sec=1524848329, tv_nsec=495431807}) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=1045, tv_nsec=123814890}) = 0
clock_gettime(CLOCK_BOOTTIME, {tv_sec=1045, tv_nsec=123945023}) = 0
recvmsg(3, {msg_name={sa_family=AF_NETLINK, nl_pid=0, nl_groups=0x000001}, msg_namelen=128->12, msg_iov=[{iov_base="unbind@/devices/pci0000:00/0000:"..., iov_len=8192}], msg_iovlen=1, msg_control=[{cmsg_len=28, cmsg_level=SOL_SOCKET, cmsg_type=SCM_CREDENTIALS, cmsg_data={pid=0, uid=0, gid=0}}], msg_controllen=32, msg_flags=0}, 0) = 243
getrandom("\x9c\x6d\x41\x2b\xb5\xf0\xf1\x9a\x32\xb3\x4a\x73\xee\x04\xff\x90", 16, GRND_NONBLOCK) = 16
clock_gettime(CLOCK_MONOTONIC, {tv_sec=1045, tv_nsec=126971116}) = 0
getrandom("\xaf\x35\x7a\x36\x01\x32\xa6\xe6\x13\x46\x4e\x22\xcc\x48\x77\x9b", 16, GRND_NONBLOCK) = 16
getrandom("\x48\x0b\xeb\xf1\xf0\x1c\xf1\x78\x89\xb7\x48\xe1\x84\x38\xc9\x3c", 16, GRND_NONBLOCK) = 16
getrandom("\x11\x06\x8c\x4a\xeb\xff\x84\x8e\x0c\x09\x00\x84\x62\x74\xfc\xd7", 16, GRND_NONBLOCK) = 16
getrandom("\xb5\x8e\x19\x16\xad\xf6\x16\x7e\x21\x66\x90\x12\x2d\x43\x46\x45", 16, GRND_NONBLOCK) = 16
getrandom("\x84\x7d\x47\x96\x50\x36\xad\x28\x06\x6e\xed\x33\xe0\x05\x57\x20", 16, GRND_NONBLOCK) = 16
epoll_wait(10, [{EPOLLIN, {u32=4010170080, u64=94544830289632}}, {EPOLLIN, {u32=4010060672, u64=94544830180224}}], 11, 0) = 2
clock_gettime(CLOCK_REALTIME, {tv_sec=1524848329, tv_nsec=504542288}) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=1045, tv_nsec=131992368}) = 0
clock_gettime(CLOCK_BOOTTIME, {tv_sec=1045, tv_nsec=132096027}) = 0
epoll_wait(10, [{EPOLLIN, {u32=4010170080, u64=94544830289632}}, {EPOLLIN, {u32=4010060672, u64=94544830180224}}], 11, 0) = 2
clock_gettime(CLOCK_REALTIME, {tv_sec=1524848329, tv_nsec=504955877}) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=1045, tv_nsec=132438717}) = 0
clock_gettime(CLOCK_BOOTTIME, {tv_sec=1045, tv_nsec=132555928}) = 0
recvmsg(7, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="", iov_len=0}], msg_iovlen=1, msg_control=[{cmsg_len=28, cmsg_level=SOL_SOCKET, cmsg_type=SCM_CREDENTIALS, cmsg_data={pid=24957, uid=0, gid=0}}], msg_controllen=32, msg_flags=0}, MSG_DONTWAIT) = 0
recvmsg(7, {msg_namelen=0}, MSG_DONTWAIT) = -1 EAGAIN (Resource temporarily unavailable)
sendmsg(3, {msg_name={sa_family=AF_NETLINK, nl_pid=-853365251, nl_groups=00000000}, msg_namelen=12, msg_iov=[{iov_base="libudev\0\376\355\312\376(\0\0\0(\0\0\0\23\1\0\0\5w\305\345\261\2Ge"..., iov_len=40}, {iov_base="ACTION=bind\0DEVPATH=/devices/pci"..., iov_len=275}], msg_iovlen=2, msg_controllen=0, msg_flags=0}, 0) = 315
epoll_wait(10, [{EPOLLIN, {u32=4010170080, u64=94544830289632}}], 11, 0) = 1
clock_gettime(CLOCK_REALTIME, {tv_sec=1524848329, tv_nsec=512870505}) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=1045, tv_nsec=140367037}) = 0
clock_gettime(CLOCK_BOOTTIME, {tv_sec=1045, tv_nsec=140494166}) = 0
recvmsg(3, {msg_name={sa_family=AF_NETLINK, nl_pid=0, nl_groups=0x000001}, msg_namelen=128->12, msg_iov=[{iov_base="bind@/devices/pci0000:00/0000:00"..., iov_len=8192}], msg_iovlen=1, msg_control=[{cmsg_len=28, cmsg_level=SOL_SOCKET, cmsg_type=SCM_CREDENTIALS, cmsg_data={pid=0, uid=0, gid=0}}], msg_controllen=32, msg_flags=0}, 0) = 311
getrandom("\x21\xcd\x52\xae\x20\xa4\xe9\x0f\x2c\x3f\x68\x8a\x77\x65\xfb\x22", 16, GRND_NONBLOCK) = 16
getrandom("\xb5\x1f\x43\xf7\x14\x3e\x29\x6c\xdd\x95\xd5\x64\xec\xec\x66\xca", 16, GRND_NONBLOCK) = 16
clock_gettime(CLOCK_MONOTONIC, {tv_sec=1045, tv_nsec=141295429}) = 0
getrandom("\xe7\x73\x2e\xc2\x5d\x71\x93\x8a\xd0\xf4\x5f\xd7\x91\x1f\x7b\x00", 16, GRND_NONBLOCK) = 16
getrandom("\xe4\xd4\xd3\x2c\xa2\xa1\x0c\x96\x6e\x6a\x34\x9c\x50\x06\x3d\x43", 16, GRND_NONBLOCK) = 16
getrandom("\xb0\x7f\xf7\x93\x1f\xa6\x6d\x2e\x01\xfb\x21\x97\x4b\xe8\x85\x14", 16, GRND_NONBLOCK) = 16
getrandom("\x3f\x94\x2b\x17\x01\x8f\x88\x2e\x08\xa0\x9d\xd0\xef\x4f\x0e\x9a", 16, GRND_NONBLOCK) = 16
epoll_wait(10, [{EPOLLIN, {u32=4010170080, u64=94544830289632}}, {EPOLLIN, {u32=4010060672, u64=94544830180224}}], 11, 0) = 2
clock_gettime(CLOCK_REALTIME, {tv_sec=1524848329, tv_nsec=519062044}) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=1045, tv_nsec=146474265}) = 0
clock_gettime(CLOCK_BOOTTIME, {tv_sec=1045, tv_nsec=146513033}) = 0
epoll_wait(10, [{EPOLLIN, {u32=4010170080, u64=94544830289632}}, {EPOLLIN, {u32=4010060672, u64=94544830180224}}], 11, 0) = 2
clock_gettime(CLOCK_REALTIME, {tv_sec=1524848329, tv_nsec=519231922}) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=1045, tv_nsec=146636530}) = 0
clock_gettime(CLOCK_BOOTTIME, {tv_sec=1045, tv_nsec=146675297}) = 0
recvmsg(7, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="", iov_len=0}], msg_iovlen=1, msg_control=[{cmsg_len=28, cmsg_level=SOL_SOCKET, cmsg_type=SCM_CREDENTIALS, cmsg_data={pid=24957, uid=0, gid=0}}], msg_controllen=32, msg_flags=0}, MSG_DONTWAIT) = 0
recvmsg(7, {msg_namelen=0}, MSG_DONTWAIT) = -1 EAGAIN (Resource temporarily unavailable)
sendmsg(3, {msg_name={sa_family=AF_NETLINK, nl_pid=-853365251, nl_groups=00000000}, msg_namelen=12, msg_iov=[{iov_base="libudev\0\376\355\312\376(\0\0\0(\0\0\0\315\0\0\0\5w\305\345\261\2Ge"..., iov_len=40}, {iov_base="ACTION=unbind\0DEVPATH=/devices/p"..., iov_len=205}], msg_iovlen=2, msg_controllen=0, msg_flags=0}, 0) = 245
epoll_wait(10, [{EPOLLIN, {u32=4010170080, u64=94544830289632}}], 11, 0) = 1
clock_gettime(CLOCK_REALTIME, {tv_sec=1524848329, tv_nsec=525080911}) = 0
clock_gettime(CLOCK_MONOTONIC, {tv_sec=1045, tv_nsec=152528058}) = 0
clock_gettime(CLOCK_BOOTTIME, {tv_sec=1045, tv_nsec=152611810}) = 0
....
chạy udevadm monitor
in nhiều lần sau đây:
KERNEL[1464.842652] bind /devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0 (usb)
KERNEL[1464.844393] unbind /devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0 (usb)
UDEV [1464.845340] bind /devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0 (usb)
KERNEL[1464.857728] bind /devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0 (usb)
KERNEL[1464.858361] unbind /devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0 (usb)
....
và chạy journalctl
trả lại nhiều lần:
Apr 27 05:22:09 amir-pc systemd-udevd[359]: Process 'hid2hci --method=dell --devpath=/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3
Apr 27 05:22:09 amir-pc upowerd[1339]: unhandled action 'unbind' on /sys/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0
-- Logs begin at Fri 2018-04-27 05:22:09 +0430, end at Fri 2018-04-27 21:37:15 +0430. --
Apr 27 05:22:09 amir-pc systemd-udevd[359]: Process 'hid2hci --method=dell --devpath=/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3
Apr 27 05:22:09 amir-pc upowerd[1339]: unhandled action 'unbind' on /sys/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0
Apr 27 05:22:09 amir-pc systemd-udevd[359]: Process 'hid2hci --method=dell --devpath=/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3
Apr 27 05:22:09 amir-pc upowerd[1339]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0
....
chạy dmesg
trở lại:
[ 441.582359] usb 3-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 441.582361] usb 3-1.3: Product: Dell Wireless 370 Bluetooth Mini-card
[ 441.582363] usb 3-1.3: Manufacturer: Dell Computer Corp
[ 450.803644] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.811642] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.819653] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.826650] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.833668] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.841644] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.848630] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.856628] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.863632] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.871611] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.881629] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.888616] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.896634] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.903596] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.910611] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.917595] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.926603] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.933598] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.942616] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.949606] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.957363] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.964607] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.973581] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.980582] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.987582] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 450.994561] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 451.004574] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 451.009525] ERROR @wl_cfg80211_scan :
[ 451.009527] WLC_SCAN error (-22)
[ 451.010550] usb 3-1.2: usbfs: USBDEVFS_CONTROL failed cmd hid2hci rqt 33 rq 9 len 4 ret -71
[ 451.020078] usb 3-1: USB disconnect, device number 14
[ 451.020081] usb 3-1.1: USB disconnect, device number 15
[ 451.076974] usb 3-1.2: USB disconnect, device number 16
[ 451.077105] usb 3-1.3: USB disconnect, device number 19
[ 796.468102] usb 3-1: new full-speed USB device number 20 using uhci_hcd
[ 796.672318] usb 3-1: New USB device found, idVendor=0a5c, idProduct=4500
[ 796.672322] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 796.672325] usb 3-1: Product: BCM2046B1
[ 796.672328] usb 3-1: Manufacturer: Broadcom
[ 796.674239] hub 3-1:1.0: USB hub found
[ 796.676385] hub 3-1:1.0: 3 ports detected
[ 796.976059] usb 3-1.1: new full-speed USB device number 21 using uhci_hcd
[ 797.109323] usb 3-1.1: New USB device found, idVendor=413c, idProduct=8157
[ 797.109332] usb 3-1.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 797.116785] input: HID 413c:8157 as /devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.1/3-1.1:1.0/0003:413C:8157.000B/input/input25
[ 797.176461] hid-generic 0003:413C:8157.000B: input,hidraw0: USB HID v1.11 Keyboard [HID 413c:8157] on usb-0000:00:1a.0-1.1/input0
[ 797.256314] usb 3-1.2: new full-speed USB device number 22 using uhci_hcd
[ 797.396307] usb 3-1.2: New USB device found, idVendor=413c, idProduct=8158
[ 797.396315] usb 3-1.2: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 797.405072] input: HID 413c:8158 as /devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0/0003:413C:8158.000C/input/input26
[ 797.464858] hid-generic 0003:413C:8158.000C: input,hidraw3: USB HID v1.11 Mouse [HID 413c:8158] on usb-0000:00:1a.0-1.2/input0
[ 797.564507] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready
[ 797.944045] usb 3-1.3: new full-speed USB device number 23 using uhci_hcd
[ 803.296508] usb 3-1.3: unable to read config index 0 descriptor/all
[ 803.296515] usb 3-1.3: can't read configurations, error -110
[ 803.376039] usb 3-1.3: new full-speed USB device number 24 using uhci_hcd
[ 808.672986] usb 3-1.3: unable to read config index 0 descriptor/all
[ 808.672993] usb 3-1.3: can't read configurations, error -110
[ 808.673984] usb 3-1-port3: attempt power cycle
[ 809.280029] usb 3-1.3: new full-speed USB device number 25 using uhci_hcd
[ 809.340944] usb 3-1.3: New USB device found, idVendor=413c, idProduct=8156
[ 809.340948] usb 3-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 809.340951] usb 3-1.3: Product: Dell Wireless 370 Bluetooth Mini-card
[ 809.340954] usb 3-1.3: Manufacturer: Dell Computer Corp
[ 1337.985097] perf: interrupt took too long (2508 > 2500), lowering kernel.perf_event_max_sample_rate to 79500
[ 1387.269440] perf: interrupt took too long (3140 > 3135), lowering kernel.perf_event_max_sample_rate to 63500
[ 1454.553305] perf: interrupt took too long (3927 > 3925), lowering kernel.perf_event_max_sample_rate to 50750
....
và chạy /lib/systemd/systemd-udevd -D
trả về kết quả dưới đây nhiều lần:
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
starting 'hid2hci --method=dell --devpath=/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0'
seq 284188 queued, 'bind' 'usb'
seq 284189 queued, 'unbind' 'usb'
'hid2hci --method=dell --devpath=/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0'(err) 'error: switching device '/sys//devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0' failed.'
Process 'hid2hci --method=dell --devpath=/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0' failed with exit code 1.
seq 284184 processed
seq 284185 running
RUN 'hid2hci --method=dell --devpath=%p' /lib/udev/rules.d/97-hid2hci.rules:11
starting 'hid2hci --method=dell --devpath=/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0'
seq 284190 queued, 'bind' 'usb'
seq 284191 queued, 'unbind' 'usb'
Kubfox mới được cài đặt của tôi đang sử dụng phiên bản kernel 4.15.0-20-generic
và máy tính xách tay của tôi là Dell Studio XPS 1640. WiFi đang sử dụng bcmwl-kernel-source 6.30.223.271+bdcom-0ubuntu4
trình điều khiển (hạ cấp xuống trình điều khiển làm việc trước đó không giải quyết được vấn đề).
Điều đáng nói là không có thiết bị USB nào được kết nối, chỉ có chuột không dây, điều này không gây ra vấn đề gì (việc ngắt kết nối không ảnh hưởng đến sự cố). Nhưng như đã đề cập, tắt WiFi luôn khiến tải CPU cao biến mất.