História
Eu me deparei com um problema estranho ontem (13 de janeiro de 2018). Meu Ubuntu não foi capaz de obter sinais strongs de Wifi. Uma vez eu encontrei este problema antes e pude corrigi-lo usando este post . A solução foi fazer um arquivo de configuração da seguinte forma -
sudo tee /etc/modprobe.d/rtl8723be.conf <<< "options rtl8723be ant_sel=1"
Mas desta vez não estava funcionando. Eu encontrei este artigo e foi capaz para resolver com êxito o problema do "sinal Wifi fraco". Ele pediu para baixar os drivers de este repositório e instalá-lo usando
sudo make install
Seguido pela execução desses comandos e, em seguida, fazendo um arquivo de configuração para tornar a configuração permanente
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
O problema
Mas logo descobri que o hotspot que eu costumava aproveitar criado a partir do meu laptop estava dando velocidade terrível (de apenas cerca de 0,5 Mbps) . A velocidade que obtenho na minha LAN é de cerca de 80Mbps . Eu mudei para o Windows e descobri que o Hotspot criado ali dá velocidade Wifi de cerca de 30 Mbps . Eu também gostaria de acrescentar que estou usando Speedtest by Ookla e o Ping em cada teste de velocidade é normal (na faixa de 8 a 10), que eu costumava usar antes. Portanto, não há nenhuma alteração no ping . Tentei pesquisar esse problema, mas não consegui encontrar nada relacionado. Sua ajuda será apreciada.
Informações Relacionadas
My wireless driver is rtl8723be
Saída de 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
Saída de 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)
Saída de lspci | grep Wireless
03:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter
Saída de route
Aqui 10.42.0.47 é o meu dispositivo conectado ao hotspot.
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
Log recente de atualização de software
Eu acho que há uma alta probabilidade de que o problema seja devido à atualização automática de algum software. Tenho certeza de que esse problema começou entre 8 e 11 de janeiro e foi definitivamente descoberto em 13 de janeiro. EDIT # 1 - Eu vejo que o kernel foi atualizado para v4.13
on 11 Jan
. Eu suspeito que o problema ocorreu por causa desta atualização.
EDIT # 2 - Eu tentei voltar ao kernel anterior (v4.10) através do grub e seguido esta postagem que explica o que fazer quando o kernel é atualizado (ou até mesmo rebaixado). Não funcionou.
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