用RTL8723BE无线网络适配器从Ubuntu16.04创建热点的速度慢

Question

历史

我昨天遇到了一个奇怪的问题(2018年1月13日)。我的Ubuntu没有收到Wifi的强烈信号。我以前曾遇到过这个问题，并能够使用这个职位修复它。解决方案是创建一个配置文件，如下所示-

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

但这一次是行不通的。我找到了这篇文章，并成功地解决了“微弱的Wifi信号”问题。它要求从这个回购下载驱动程序，并使用

sudo make install

然后执行这些命令，然后创建一个配置文件，使设置永久化。

sudo modprobe -rv rtl8723be
sudo modprobe -v rtl8723be ant_sel=2
sudo ip link set wlp13s0 up
echo "options rtl8723be ant_sel=2" | sudo tee /etc/modprobe.d/50-rtl8723be.conf

问题

但很快，我发现我以前喜欢用笔记本电脑创建的热点是速度太快了(只有0.5Mbps左右)。我在局域网上的速度大约是80 80Mbps。我切换到Windows，发现在那里创建的Hotspot使Wifi的速度达到30 Mbps左右。我还想补充的是，我使用的是Ookla的速度测试和平在每一个速度测试是正常的(在范围8至10)，我以前得到的。所以平没有什么变化。我试着寻找这个问题，但没有找到任何相关的东西。你的帮助将不胜感激。

相关信息

我的无线驱动程序是rtl8723be

输出iwconfig

enp2s0    no wireless extensions.

lo        no wireless extensions.

wlo1      IEEE 802.11  Mode:Master  Tx-Power=20 dBm   
          Retry short limit:7   RTS thr=2347 B   Fragment thr:off
          Power Management:on

输出ifconfig

enp2s0    Link encap:Ethernet  HWaddr a0:8c:fd:4d:1b:0d  
          inet addr:172.25.30.203  Bcast:172.25.30.255  Mask:255.255.255.0
          inet6 addr: fe80::90b5:2747:93a9:f969/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:39347 errors:0 dropped:0 overruns:0 frame:0
          TX packets:22188 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:9004186 (9.0 MB)  TX bytes:14741038 (14.7 MB)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:1608 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1608 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:141049 (141.0 KB)  TX bytes:141049 (141.0 KB)

wlo1      Link encap:Ethernet  HWaddr 74:df:bf:8b:11:17  
          inet addr:10.42.0.1  Bcast:10.42.0.255  Mask:255.255.255.0
          inet6 addr: fe80::76df:bfff:fe8b:1117/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:12069 errors:0 dropped:1 overruns:0 frame:0
          TX packets:8846 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:13285506 (13.2 MB)  TX bytes:2959250 (2.9 MB)

输出lspci | grep Wireless

03:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter

输出route

这里的10.42.0.47是我的设备连接到热点。

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         172.25.30.1     0.0.0.0         UG    100    0        0 enp2s0
10.42.0.0       *               255.255.255.0   U     600    0        0 wlo1
link-local      *               255.255.0.0     U     1000   0        0 enp2s0
172.25.30.0     *               255.255.255.0   U     100    0        0 enp2s0

最新软件更新日志

我认为这个问题很有可能是由于一些软件的自动更新造成的。我相信这个问题始于1月8日至11日，并于1月13日被发现。

编辑#1-我看到内核被更新为v4.13 on 11 Jan。我怀疑这个问题是因为这次更新而发生的。

编辑#2-我尝试通过grub返回到以前的内核(v4.10)，并遵循这个职位，这说明了当内核被升级(甚至降级)时该做什么。它没有起作用。

Start-Date: 2018-01-05  10:31:01
Commandline: /usr/bin/unattended-upgrade
Upgrade: ruby2.3:amd64 (2.3.1-2~16.04.2, 2.3.1-2~16.04.4), apport:amd64 
(2.20.1-0ubuntu2.14, 2.20.1-0ubuntu2.15), libruby2.3:amd64 (2.3.1-2~16.04.2, 
2.3.1-2~16.04.4), python3-apport:amd64 (2.20.1-0ubuntu2.14, 2.20.1-0ubuntu2.15), 
libwebkit2gtk-4.0-37:amd64 (2.18.3-0ubuntu0.16.04.1, 2.18.4-0ubuntu0.16.04.1), 
apport-gtk:amd64 (2.20.1-0ubuntu2.14, 2.20.1-0ubuntu2.15), gir1.2-webkit2-4.0:amd64 
(2.18.3-0ubuntu0.16.04.1, 2.18.4-0ubuntu0.16.04.1), libjavascriptcoregtk-4.0-18:amd64 
(2.18.3-0ubuntu0.16.04.1, 2.18.4-0ubuntu0.16.04.1), python3-problem-report:amd64 
(2.20.1-0ubuntu2.14, 2.20.1-0ubuntu2.15), libwebkit2gtk-4.0-37-gtk2:amd64 
(2.18.3-0ubuntu0.16.04.1, 2.18.4-0ubuntu0.16.04.1), gir1.2-javascriptcoregtk-4.0:amd64 
(2.18.3-0ubuntu0.16.04.1, 2.18.4-0ubuntu0.16.04.1)
Error: Sub-process /usr/bin/dpkg returned an error code (2)
End-Date: 2018-01-05  10:31:01

Start-Date: 2018-01-07  08:51:55
Commandline: /usr/bin/unattended-upgrade
Upgrade: ruby2.3:amd64 (2.3.1-2~16.04.2, 2.3.1-2~16.04.4), apport:amd64 
(2.20.1-0ubuntu2.14, 2.20.1-0ubuntu2.15), libruby2.3:amd64 (2.3.1-2~16.04.2, 
2.3.1-2~16.04.4), python3-apport:amd64 (2.20.1-0ubuntu2.14, 2.20.1-0ubuntu2.15), 
libwebkit2gtk-4.0-37:amd64 (2.18.3-0ubuntu0.16.04.1, 2.18.4-0ubuntu0.16.04.1), 
apport-gtk:amd64 (2.20.1-0ubuntu2.14, 2.20.1-0ubuntu2.15), gir1.2-webkit2-4.0:amd64 
(2.18.3-0ubuntu0.16.04.1, 2.18.4-0ubuntu0.16.04.1), libjavascriptcoregtk-4.0-18:amd64 
(2.18.3-0ubuntu0.16.04.1, 2.18.4-0ubuntu0.16.04.1), python3-problem-report:amd64 
(2.20.1-0ubuntu2.14, 2.20.1-0ubuntu2.15), libwebkit2gtk-4.0-37-gtk2:amd64 
(2.18.3-0ubuntu0.16.04.1, 2.18.4-0ubuntu0.16.04.1), gir1.2-javascriptcoregtk-4.0:amd64 
(2.18.3-0ubuntu0.16.04.1, 2.18.4-0ubuntu0.16.04.1)
Error: Sub-process /usr/bin/dpkg returned an error code (2)
End-Date: 2018-01-07  08:51:55

Start-Date: 2018-01-08  16:34:54
Commandline: /usr/bin/unattended-upgrade
Upgrade: ruby2.3:amd64 (2.3.1-2~16.04.2, 2.3.1-2~16.04.4), apport:amd64 
(2.20.1-0ubuntu2.14, 2.20.1-0ubuntu2.15), libruby2.3:amd64 (2.3.1-2~16.04.2, 
2.3.1-2~16.04.4), python3-apport:amd64 (2.20.1-0ubuntu2.14, 2.20.1-0ubuntu2.15), 
libwebkit2gtk-4.0-37:amd64 (2.18.3-0ubuntu0.16.04.1, 2.18.4-0ubuntu0.16.04.1), 
apport-gtk:amd64 (2.20.1-0ubuntu2.14, 2.20.1-0ubuntu2.15), gir1.2-webkit2-4.0:amd64 
(2.18.3-0ubuntu0.16.04.1, 2.18.4-0ubuntu0.16.04.1), libjavascriptcoregtk-4.0-18:amd64 
(2.18.3-0ubuntu0.16.04.1, 2.18.4-0ubuntu0.16.04.1), python3-problem-report:amd64 
(2.20.1-0ubuntu2.14, 2.20.1-0ubuntu2.15), libwebkit2gtk-4.0-37-gtk2:amd64 
(2.18.3-0ubuntu0.16.04.1, 2.18.4-0ubuntu0.16.04.1), gir1.2-javascriptcoregtk-4.0:amd64 
(2.18.3-0ubuntu0.16.04.1, 2.18.4-0ubuntu0.16.04.1)
Error: Sub-process /usr/bin/dpkg returned an error code (2)
End-Date: 2018-01-08  16:34:54

Start-Date: 2018-01-09  16:32:45
Commandline: /usr/bin/unattended-upgrade
Upgrade: ruby2.3:amd64 (2.3.1-2~16.04.2, 2.3.1-2~16.04.4), apport:amd64 
(2.20.1-0ubuntu2.14, 2.20.1-0ubuntu2.15), libruby2.3:amd64 (2.3.1-2~16.04.2, 
2.3.1-2~16.04.4), python3-apport:amd64 (2.20.1-0ubuntu2.14, 2.20.1-0ubuntu2.15), 
libwebkit2gtk-4.0-37:amd64 (2.18.3-0ubuntu0.16.04.1, 2.18.4-0ubuntu0.16.04.1), 
apport-gtk:amd64 (2.20.1-0ubuntu2.14, 2.20.1-0ubuntu2.15), gir1.2-webkit2-4.0:amd64 
(2.18.3-0ubuntu0.16.04.1, 2.18.4-0ubuntu0.16.04.1), libjavascriptcoregtk-4.0-18:amd64 
(2.18.3-0ubuntu0.16.04.1, 2.18.4-0ubuntu0.16.04.1), python3-problem-report:amd64 
(2.20.1-0ubuntu2.14, 2.20.1-0ubuntu2.15), libwebkit2gtk-4.0-37-gtk2:amd64 
(2.18.3-0ubuntu0.16.04.1, 2.18.4-0ubuntu0.16.04.1), gir1.2-javascriptcoregtk-4.0:amd64 
(2.18.3-0ubuntu0.16.04.1, 2.18.4-0ubuntu0.16.04.1)
End-Date: 2018-01-09  16:34:23

Start-Date: 2018-01-10  16:55:32
Commandline: /usr/bin/unattended-upgrade
Upgrade: poppler-utils:amd64 (0.41.0-0ubuntu1.5, 0.41.0-0ubuntu1.6), linux-libc-dev:amd64 
(4.4.0-104.127, 4.4.0-108.131), firefox-locale-en:amd64 (57.0.3+build1-0ubuntu0.16.04.1, 
57.0.4+build1-0ubuntu0.16.04.1), firefox:amd64 (57.0.3+build1-0ubuntu0.16.04.1, 
57.0.4+build1-0ubuntu0.16.04.1), libpoppler-glib8:amd64 (0.41.0-0ubuntu1.5, 
0.41.0-0ubuntu1.6), libpoppler58:amd64 (0.41.0-0ubuntu1.5, 0.41.0-0ubuntu1.6)
End-Date: 2018-01-10  16:56:08

=====================================================================
Start-Date: 2018-01-11  14:39:00
Commandline: /usr/bin/unattended-upgrade
Install: linux-image-4.13.0-26-generic:amd64 (4.13.0-26.29~16.04.2, automatic), 
linux-headers-4.13.0-26:amd64 (4.13.0-26.29~16.04.2, automatic), 
linux-signed-image-4.13.0-26-generic:amd64 (4.13.0-26.29~16.04.2, automatic), 
linux-image-extra-4.13.0-26-generic:amd64 (4.13.0-26.29~16.04.2, automatic), 
linux-headers-4.13.0-26-generic:amd64 (4.13.0-26.29~16.04.2, automatic)
Upgrade: linux-libc-dev:amd64 (4.4.0-108.131, 4.4.0-109.132), ruby2.3:amd64 
(2.3.1-2~16.04.4, 2.3.1-2~16.04.5), linux-image-generic-hwe-16.04:amd64 (4.10.0.42.44, 
4.13.0.26.46), linux-signed-generic-hwe-16.04:amd64 (4.10.0.42.44, 4.13.0.26.46), 
linux-generic-hwe-16.04:amd64 (4.10.0.42.44, 4.13.0.26.46), 
linux-signed-image-generic-hwe-16.04:amd64 (4.10.0.42.44, 4.13.0.26.46), libruby2.3:amd64 
(2.3.1-2~16.04.4, 2.3.1-2~16.04.5), linux-headers-generic-hwe-16.04:amd64 (4.10.0.42.44, 
4.13.0.26.46)
End-Date: 2018-01-11  14:42:54
=====================================================================

Start-Date: 2018-01-13  15:57:28
Commandline: apt upgrade
Requested-By: rohan (1000)
Install: libllvm5.0:amd64 (1:5.0-3~16.04.1, automatic), libdrm-common:amd64 
(2.4.83-1~16.04.1, automatic)
Upgrade: suru-icon-theme:amd64 (14.04+16.04.20161024-0ubuntu1, 
14.04+16.04.20171116-0ubuntu1), libgles2-mesa:amd64 (17.0.7-0ubuntu0.16.04.2, 
17.2.4-0ubuntu1~16.04.2), libseccomp2:amd64 (2.2.3-3ubuntu3, 2.3.1-2.1ubuntu2~16.04.1), 
intel-microcode:amd64 (3.20170707.1~ubuntu16.04.0, 3.20180108.0~ubuntu16.04.2), 
libdrm-nouveau2:amd64 (2.4.76-1~ubuntu16.04.1, 2.4.83-1~16.04.1), libgweather-3-6:amd64 
(3.18.2-0ubuntu0.1, 3.18.2-0ubuntu0.2), grub-common:amd64 (2.02~beta2-36ubuntu3.14, 
2.02~beta2-36ubuntu3.15), libglapi-mesa:amd64 (17.0.7-0ubuntu0.16.04.2, 
17.2.4-0ubuntu1~16.04.2), snapd:amd64 (2.28.5, 2.29.4.2), squashfs-tools:amd64 
(1:4.3-3ubuntu2, 1:4.3-3ubuntu2.16.04.1), google-chrome-stable:amd64 (63.0.3239.108-1, 
63.0.3239.132-1), libxatracker2:amd64 (17.0.7-0ubuntu0.16.04.2, 17.2.4-0ubuntu1~16.04.2), 
grub2-common:amd64 (2.02~beta2-36ubuntu3.14, 2.02~beta2-36ubuntu3.15), libegl1-mesa:amd64 
(17.0.7-0ubuntu0.16.04.2, 17.2.4-0ubuntu1~16.04.2), initramfs-tools-bin:amd64 
(0.122ubuntu8.9, 0.122ubuntu8.10), libgbm1:amd64 (17.0.7-0ubuntu0.16.04.2, 
17.2.4-0ubuntu1~16.04.2), adapta-gtk-theme:amd64 (3.92.2.57-0ubuntu1~xenial1, 
3.93.0.38-0ubuntu1~xenial1), libdrm-amdgpu1:amd64 (2.4.76-1~ubuntu16.04.1, 
2.4.83-1~16.04.1), grub-efi-amd64-bin:amd64 (2.02~beta2-36ubuntu3.14, 
2.02~beta2-36ubuntu3.15), libwayland-egl1-mesa:amd64 (17.0.7-0ubuntu0.16.04.2, 
17.2.4-0ubuntu1~16.04.2), ubuntu-core-launcher:amd64 (2.28.5, 2.29.4.2), libdrm2:amd64 
(2.4.76-1~ubuntu16.04.1, 2.4.83-1~16.04.1), libwebkit2gtk-4.0-37:amd64 
(2.18.4-0ubuntu0.16.04.1, 2.18.5-0ubuntu0.16.04.1), ubuntu-mobile-icons:amd64 
(14.04+16.04.20161024-0ubuntu1, 14.04+16.04.20171116-0ubuntu1), libgl1-mesa-dri:amd64 
(17.0.7-0ubuntu0.16.04.2, 17.2.4-0ubuntu1~16.04.2), grub-efi-amd64:amd64 
(2.02~beta2-36ubuntu3.14, 2.02~beta2-36ubuntu3.15), xserver-xorg-core-hwe-16.04:amd64 
(2:1.19.3-1ubuntu1~16.04.4, 2:1.19.5-0ubuntu2~16.04.1), light-themes:amd64 
(14.04+16.04.20161024-0ubuntu1, 14.04+16.04.20171116-0ubuntu1), ubuntu-artwork:amd64 
(1:14.04+16.04.20161024-0ubuntu1, 1:14.04+16.04.20171116-0ubuntu1), libgl1-mesa-glx:amd64 
(17.0.7-0ubuntu0.16.04.2, 17.2.4-0ubuntu1~16.04.2), grub-efi-amd64-signed:amd64 
(1.66.14+2.02~beta2-36ubuntu3.14, 1.66.15+2.02~beta2-36ubuntu3.15), 
gir1.2-webkit2-4.0:amd64 (2.18.4-0ubuntu0.16.04.1, 2.18.5-0ubuntu0.16.04.1), 
unattended-upgrades:amd64 (0.90ubuntu0.8, 0.90ubuntu0.9), libdrm-intel1:amd64 
(2.4.76-1~ubuntu16.04.1, 2.4.83-1~16.04.1), libdrm-radeon1:amd64 (2.4.76-1~ubuntu16.04.1, 
2.4.83-1~16.04.1), xserver-xorg-legacy-hwe-16.04:amd64 (2:1.19.3-1ubuntu1~16.04.4, 
2:1.19.5-0ubuntu2~16.04.1), mesa-vdpau-drivers:amd64 (17.0.7-0ubuntu0.16.04.2, 
17.2.4-0ubuntu1~16.04.2), libjavascriptcoregtk-4.0-18:amd64 (2.18.4-0ubuntu0.16.04.1, 
2.18.5-0ubuntu0.16.04.1), ubuntu-mono:amd64 (14.04+16.04.20161024-0ubuntu1, 
14.04+16.04.20171116-0ubuntu1), libgweather-common:amd64 (3.18.2-0ubuntu0.1, 
3.18.2-0ubuntu0.2), initramfs-tools-core:amd64 (0.122ubuntu8.9, 0.122ubuntu8.10), 
initramfs-tools:amd64 (0.122ubuntu8.9, 0.122ubuntu8.10), libwebkit2gtk-4.0-37-gtk2:amd64 
(2.18.4-0ubuntu0.16.04.1, 2.18.5-0ubuntu0.16.04.1), gir1.2-javascriptcoregtk-4.0:amd64 
(2.18.4-0ubuntu0.16.04.1, 2.18.5-0ubuntu0.16.04.1)
End-Date: 2018-01-13  16:00:19

Start-Date: 2018-01-13  18:09:45
Commandline: apt install papirus-icon-theme
Requested-By: rohan (1000)
Install: libreoffice-style-papirus:amd64 (20170914-44+pkg3~ubuntu16.04.1, automatic), 
papirus-icon-theme:amd64 (20180113-2047+pkg17~ubuntu16.04.1)
End-Date: 2018-01-13  18:10:12

Start-Date: 2018-01-13  18:14:39
Commandline: apt-get install arc-theme
Requested-By: rohan (1000)
Install: gnome-themes-standard:amd64 (3.18.0-2ubuntu1, automatic), 
gnome-themes-standard-data:amd64 (3.18.0-2ubuntu1, automatic), arc-theme:amd64 
(1488477732.766ae1a-0)
End-Date: 2018-01-13  18:14:43

Start-Date: 2018-01-13  21:22:41
Commandline: apt autoremove
Requested-By: rohan (1000)
Remove: linux-image-4.10.0-40-generic:amd64 (4.10.0-40.44~16.04.1), 
linux-signed-image-4.10.0-40-generic:amd64 (4.10.0-40.44~16.04.1), libllvm4.0:amd64 
(1:4.0-1ubuntu1~16.04.2), linux-image-extra-4.10.0-40-generic:amd64 
(4.10.0-40.44~16.04.1), linux-headers-4.10.0-40:amd64 (4.10.0-40.44~16.04.1), 
linux-headers-4.10.0-40-generic:amd64 (4.10.0-40.44~16.04.1)
End-Date: 2018-01-13  21:24:20

Answer 1

我认为wifi电源管理是造成速度慢的原因，它可以被禁用。

echo "options rtl8723be ips=0" | sudo tee -a /etc/modprobe.d/50-rtl8723be.conf
sudo sed -i 's/wifi.powersave = 3/wifi.powersave = 2/' /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf

重新启动

Answer 2

对于https://forum.ubuntuusers.de/topic/w-lan-geht-nicht-auf-laptop-bzw-hat-starke-sch/#post-8108483 (德国论坛)，原因可能是您可以检查和重置的设置。

检查使用modinfo -F parm rtl8723be

输出应该如下所示：

parm:           swlps:bool
parm:           swenc:using hardware crypto (default 0 [hardware]) (bool)
parm:           ips:using no link power save (default 1 is open) (bool)
parm:           fwlps:using linked fw control power save (default 1 is open) (bool)
parm:           msi:Set to 1 to use MSI interrupts mode (default 0) (bool)
parm:           debug:Set debug level (0-5) (default 0) (int)
parm:           disable_watchdog:Set to 1 to disable the watchdog (default 0) (bool)
parm:           ant_sel:Set to 1 or 2 to force antenna number (default 0) (int)

最后一行是有趣的。您可以将ant_sel的值从0更改为2。重新启动并检查。-你必须自己去找出正确的价值。

echo "options rtl8723be swenc=1 fwlps=0 ips=0 ant_sel=1" | sudo tee /etc/modprobe.d/rtl8723be.conf

我不知道这是否解决了你的问题，但你可以试一试。

Answer 3

检查您的熵可用：

cat /proc/sys/kernel/random/entropy_avail

来自弧形维基和熵：

如果熵相当低(<1000)，则可能应该安装haveged。否则，密码应用程序将阻塞，直到有足够的熵可用，例如。如果您的服务器是软件访问点，则可能导致wlan速度慢。

安装已安装：

sudo apt install haveged

检查您的wifi速度，然后开始执行以下操作：

sudo service haveged start

现在启动您的AP并再次检查速度。希望你的问题能得到解决