最近在台式机上安装了ubuntu 16.04，搭配了 USB插口的TP LINK TL-WN823N 无线网卡。
幸运的是可以正常上网了
不幸的是，只要reboot重启主机，无线网卡就需要重新插拔才可以用。
但是冷启动的话，无线网卡就可以正常使用，就是有的时候会掉线。
以下是一些命令，应该是看内核和驱动的吧
root@work-PC:~# uname -r
4.10.0-33-generic
root@work-PC:~#
lsusb:
root@work-PC:~# lsusb
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 0bda:818b Realtek Semiconductor Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 003: ID 03f0:0324 Hewlett-Packard SK-2885 keyboard
Bus 004 Device 002: ID 046d:c014 Logitech, Inc. Corded Workstation Mouse
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
root@work-PC:~#
root@work-PC:~#
lsusb -t:
root@work-PC:~# lsusb -t
/: Bus 08.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
/: Bus 07.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
/: Bus 06.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
/: Bus 05.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
|__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 2: Dev 3, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/6p, 480M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/6p, 480M
|__ Port 2: Dev 2, If 0, Class=Vendor Specific Class, Driver=rtl8xxxu, 480M
root@work-PC:~#
root@work-PC:~#
lsmod | grep 8192:
root@work-PC:~# lsmod | grep 8192
snd_hda_core 81920 4 snd_hda_intel,snd_hda_codec,snd_hda_codec_generic,snd_hda_codec_realtek
sudo dmesg | grep 8192:
root@work-PC:~# sudo dmesg | grep 8192
[ 0.000000] setup_percpu: NR_CPUS:8192 nr_cpumask_bits:4 nr_cpu_ids:4 nr_node_ids:1
[ 0.000000] percpu: Embedded 36 pages/cpu @ffffa0f0bb600000 s107992 r8192 d31272 u524288
[ 0.000000] pcpu-alloc: s107992 r8192 d31272 u524288 alloc=1*2097152
[ 0.000000] RCU restricting CPUs from NR_CPUS=8192 to nr_cpu_ids=4.
[ 12.031268] usb 1-2: rtl8192eu_parse_efuse: dumping efuse (0x200 bytes):
[ 12.031371] usb 1-2: RTL8192EU rev B (SMIC) 2T2R, TX queues 3, WiFi=1, BT=0, GPS=0, HI PA=0
[ 12.031373] usb 1-2: RTL8192EU MAC: 30:b4:9e:84:1f:28
[ 12.031375] usb 1-2: rtl8xxxu: Loading firmware rtlwifi/rtl8192eu_nic.bin
root@work-PC:~#
root@work-PC:~#
sudo iwconfig:
root@work-PC:~# sudo iwconfig
enp0s25 no wireless extensions.
lo no wireless extensions.
wlx30b49e841f28 IEEE 802.11 ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
Retry short limit:7 RTS thr=2347 B Fragment thr:off
Encryption key:off
Power Management:off
root@work-PC:~#
root@work-PC:~#
