无法连接某些Wifi

我无法连接到HP Notebook 15中的Ubuntu 16.04中的宽带Wifi，但我可以将其与Window和Android mobile连接。

以下是有关我的Wifi驱动程序和硬件的信息。

lspci

00:00.0 Host bridge: Intel Corporation Broadwell-U Host Bridge -OPI (rev 09)
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 5500 (rev 09)
00:03.0 Audio device: Intel Corporation Broadwell-U Audio Controller (rev 09)
00:04.0 Signal processing controller: Intel Corporation Broadwell-U Processor Thermal Subsystem (rev 09)
00:14.0 USB controller: Intel Corporation Wildcat Point-LP USB xHCI Controller (rev 03)
00:16.0 Communication controller: Intel Corporation Wildcat Point-LP MEI Controller #1 (rev 03)
00:1b.0 Audio device: Intel Corporation Wildcat Point-LP High Definition Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #1 (rev e3)
00:1c.2 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #3 (rev e3)
00:1c.5 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root Port #6 (rev e3)
00:1f.0 ISA bridge: Intel Corporation Wildcat Point-LP LPC Controller (rev 03)
00:1f.2 SATA controller: Intel Corporation Wildcat Point-LP SATA Controller [AHCI Mode] (rev 03)
00:1f.3 SMBus: Intel Corporation Wildcat Point-LP SMBus Controller (rev 03)
00:1f.6 Signal processing controller: Intel Corporation Wildcat Point-LP Thermal Management Controller (rev 03)
07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL810xE PCI 
Express Fast Ethernet controller (rev 07)
0d:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe 
Wireless Network Adapter

rfkill全部列出

0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no

匿名-r

4.13.0-37-generic

nmcli dev wifi列表

 SSID     MODE   CHAN  RATE       SIGNAL  BARS  SECURITY 
 vivek_m  Infra  1     54 Mbit/s  62      ▂▄▆_  WPA2

有时

nmcli dev wifi列表

 SSID     MODE   CHAN  RATE       SIGNAL  BARS  SECURITY 
 vivek_m  Infra  1     54 Mbit/s  62      ▂▄▆_  WPA2     
 pg 1     Infra  6     54 Mbit/s  24      ▂___  WPA2 

目前，我无法同时与pg1连接，而其他pg2也未显示在列表中，而我同时通过pg2与android连接，

有时pg2连接在wifi列表中可用，但在命令列表中不可用，请检查屏幕截图，该列表在光棚的wifi列表中列出，当我单击此按钮时，它给我一个错误：

(7) The access point /org/freedesktop/NetworkManager/AccessPoint/109 was
not in the scan list.

须藤lshw -c网络

 network               
   description: Ethernet interface
   product: RTL810xE PCI Express Fast Ethernet controller
   vendor: Realtek Semiconductor Co., Ltd.
   physical id: 0
   bus info: pci@0000:07:00.0
   logical name: enp7s0
   version: 07
   serial: 70:5a:0f:97:e8:cc
   size: 10Mbit/s
   capacity: 100Mbit/s
   width: 64 bits
   clock: 33MHz
   capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet         physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
   configuration: autonegotiation=on broadcast=yes driver=r8169    driverversion=2.3LK-NAPI duplex=half firmware=rtl8106e-1_0.0.1 06/29/12     latency=0 link=no multicast=yes port=MII speed=10Mbit/s
   resources: irq:43 ioport:4000(size=256) memory:c5000000-c5000fff    memory:c5100000-c5103fff
  -network
   description: Wireless interface
   product: RTL8723BE PCIe Wireless Network Adapter
   vendor: Realtek Semiconductor Co., Ltd.
   physical id: 0
   bus info: pci@0000:0d:00.0
   logical name: wlp13s0
   version: 00
   serial: 44:1c:a8:73:7d:25
   width: 64 bits
   clock: 33MHz
   capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
   configuration: broadcast=yes driver=rtl8723be driverversion=4.13.0-37-generic firmware=N/A ip=192.168.43.204 latency=0 link=yes multicast=yes wireless=IEEE 802.11
   resources: irq:16 ioport:3000(size=256) memory:c3000000-c3003fff

iwconfig

enp7s0    no wireless extensions.

lo        no wireless extensions.

wlp13s0   IEEE 802.11  ESSID:"vivek_m"  
      Mode:Managed  Frequency:2.412 GHz  Access Point: CC:61:E5:42:7B:63   
      Bit Rate=72.2 Mb/s   Tx-Power=20 dBm   
      Retry short limit:7   RTS thr=2347 B   Fragment thr:off
      Power Management:on
      Link Quality=52/70  Signal level=-58 dBm  
      Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
      Tx excessive retries:0  Invalid misc:1701   Missed beacon:0

请让我知道是否还有其他需要回答的问题，并帮助我连接以连接此Wifi。

谢谢。

首先，删除您所做的设置。

sudo rm /etc/modprobe.d/rtl8723be.conf

如果没有此文件，则没有任何问题。

然后安装一个好的驱动程序

sudo add-apt-repository ppa:hanipouspilot/rtlwifi
sudo apt-get update
sudo apt-get install rtlwifi-new-dkms

重新启动并享受

如果仍然有问题（低信号），则可能需要添加一个选项：

echo "options rtl8723be ant_sel=2"  | sudo tee /etc/modprobe.d/rtl8723be.conf  

要么

echo "options rtl8723be ant_sel=1"  | sudo tee /etc/modprobe.d/rtl8723be.conf