[SOLVED] Unable to connect to home WiFi in Linux Mint

[Figroth]

I know there are multiple topics with the very same subject, but I've not been able to solve this by reading through them, so I thought I'd try asking separately. For a while now, my laptop has been unable to connect to my Home WiFi when booted from Linux Mint. I can connect fine to Ethernet or other wireless networks and there's no problem when booted from Windows 10. If any of the more experienced Linux users around would help me figure this out, I would be very grateful.

Here is the output of a few commands that I've seen are relevant:

inxi -Fxz:

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System:    Host: Lenovo-ideapad-100-15IBD Kernel: 4.15.0-46-generic x86_64 (64 bit gcc: 5.4.0)
           Desktop: Cinnamon 3.6.7 (Gtk 3.18.9-1ubuntu3.3)
           Distro: Linux Mint 18.3 Sylvia
Machine:   System: LENOVO (portable) product: 80QQ v: Lenovo ideapad 100-15IBD
           Mobo: LENOVO model: Nano 5B6 v: SDK0J40700 WIN
           Bios: LENOVO v: E0CN16WW date: 08/04/2015
CPU:       Dual core Intel Core i3-5005U (-HT-MCP-) cache: 3072 KB
           flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 7981
           clock speeds: max: 1900 MHz 1: 869 MHz 2: 812 MHz 3: 906 MHz
           4: 917 MHz
Graphics:  Card-1: Intel HD Graphics 5500 bus-ID: 00:02.0
           Card-2: NVIDIA GK208BM [GeForce 920M] bus-ID: 04:00.0
           Display Server: X.Org 1.18.4 driver: nvidia
           Resolution: 1366x768@59.97hz
           GLX Renderer: GeForce 920M/PCIe/SSE2
           GLX Version: 4.5.0 NVIDIA 384.130 Direct Rendering: Yes
Audio:     Card-1 Intel Wildcat Point-LP High Definition Audio Controller
           driver: snd_hda_intel bus-ID: 00:1b.0
           Card-2 Intel Broadwell-U Audio Controller
           driver: snd_hda_intel bus-ID: 00:03.0
           Sound: Advanced Linux Sound Architecture v: k4.15.0-46-generic
Network:   Card-1: Realtek RTL810xE PCI Express Fast Ethernet controller
           driver: r8169 v: 2.3LK-NAPI port: 5000 bus-ID: 02:00.0
           IF: enp2s0 state: down mac: <filter>
           Card-2: Realtek RTL8723BE PCIe Wireless Network Adapter
           driver: rtl8723be port: 4000 bus-ID: 03:00.0
           IF: wlp3s0 state: up mac: <filter>
Drives:    HDD Total Size: 500.1GB (2.8% used)
           ID-1: /dev/sda model: WDC_WD5000LPCX size: 500.1GB temp: 31C
Partition: ID-1: / size: 27G used: 9.4G (38%) fs: ext4 dev: /dev/sda8
           ID-2: swap-1 size: 4.21GB used: 0.00GB (0%) fs: swap dev: /dev/sda9
RAID:      No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors:   System Temperatures: cpu: 59.0C mobo: N/A gpu: 0.0:52C
           Fan Speeds (in rpm): cpu: N/A
Info:      Processes: 212 Uptime: 1:10 Memory: 1591.4/3859.4MB
           Init: systemd runlevel: 5 Gcc sys: 5.4.0
           Client: Shell (bash 4.3.481) inxi: 2.2.35

rfkill list all:

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0: ideapad_wlan: Wireless LAN
	Soft blocked: no
	Hard blocked: no
1: ideapad_bluetooth: Bluetooth
	Soft blocked: yes
	Hard blocked: no
2: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: no
3: hci0: Bluetooth
	Soft blocked: yes
	Hard blocked: no

iwconfig:

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lo        no wireless extensions.

wlp3s0    IEEE 802.11  ESSID:"wifiname"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: B8:A3:86:EC:19:FF   
          Bit Rate=7.2 Mb/s   Tx-Power=20 dBm   
          Retry short limit:7   RTS thr=2347 B   Fragment thr:off
          Power Management:on
          Link Quality=70/70  Signal level=-30 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:1   Missed beacon:0

enp2s0    no wireless extensions.

inxi -Nn:

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Network:   Card-1: Realtek RTL810xE PCI Express Fast Ethernet controller
           driver: r8169
           IF: enp2s0 state: down mac: 50:7b:9d:83:2c:86
           Card-2: Realtek RTL8723BE PCIe Wireless Network Adapter
           driver: rtl8723be
           IF: wlp3s0 state: up mac: 48:e2:44:a4:e0:41

Thanks in advance!

[Figroth]

If anyone could provide any insight, it would be really appreciated. If any more info is required on the situation, do ask.

[Pierre]

Open Terminal and run this:

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wget -N -t 5 -T 10 https://github.com/UbuntuForums/wireless-info/raw/master/wireless-info && chmod +x wireless-info && ./wireless-info

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cat wireless-info.txt | nc termbin.com 9999

Post URL from Terminal, back here, on your reply.

[Figroth]

Here you go: https://termbin.com/de3j9.

[kelebek333]

Card-2: Realtek RTL8723BE PCIe Wireless Network Adapter
driver: rtl8723be port: 4000 bus-ID: 03:00.0
IF: wlp3s0 state: up mac: <filter>

You can try to create configuration file for rtl8723be driver module related antenna selection and power management with following command.

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echo "options rtl8723be swenc=1 ips=0 fwlps=0 ant_sel=2" | sudo tee /etc/modprobe.d/rtl8723be.conf

[Figroth]

Card-2: Realtek RTL8723BE PCIe Wireless Network Adapter
driver: rtl8723be port: 4000 bus-ID: 03:00.0
IF: wlp3s0 state: up mac: <filter>

You can try to create configuration file for rtl8723be driver module related antenna selection and power management with following command.

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echo "options rtl8723be swenc=1 ips=0 fwlps=0 ant_sel=2" | sudo tee /etc/modprobe.d/rtl8723be.conf

It doesn't seem to work.

[qbit]

In your /de3j9 file which i've read from the server there is the line

CAPABILITIES.CARRIER-DETECT: no

This must should be a "yes", i guess, in my working wifi system it is Yes

So, compare the wifi frequency when you boot win10 , (hopefully that it be possible) with the frequency under mint.
Maybe it is a channel trouble with any automatic channel selection, country laws for wifi channels etc. etc

[JeremyB]

I would do

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 sudo sed -i 's/3/2/' /etc/NetworkManager/conf.d/*
echo "options rtl8723be ips=N" | sudo tee /etc/modprobe.d/rtl8723be.conf
sudo iwconfig  wlp3s0 txpower 20

If you can make changes on the wifi router, disable TKIP encryption and move it to channel 11, and see if you can figure out why it is asking for the tx power to be limited to 20dbm

[kelebek333]

Card-2: Realtek RTL8723BE PCIe Wireless Network Adapter
driver: rtl8723be port: 4000 bus-ID: 03:00.0
IF: wlp3s0 state: up mac: <filter>

You can try to create configuration file for rtl8723be driver module related antenna selection and power management with following command.

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echo "options rtl8723be swenc=1 ips=0 fwlps=0 ant_sel=2" | sudo tee /etc/modprobe.d/rtl8723be.conf

It doesn't seem to work.

Did you try to reboot after this configuration.

[Figroth]

You can try to create configuration file for rtl8723be driver module related antenna selection and power management with following command.

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echo "options rtl8723be swenc=1 ips=0 fwlps=0 ant_sel=2" | sudo tee /etc/modprobe.d/rtl8723be.conf

It doesn't seem to work.

Did you try to reboot after this configuration.

I did.

[kelebek333]

You can try to install latest driver from rtlwifi-new github repo with following commands. You must disable secureboot before this.

1. Install requirements

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sudo apt-get install build-essential git dkms linux-headers-$(uname -r)

2. Download source and install rtlwifi-new driver with following commands

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git clone https://github.com/lwfinger/rtlwifi_new rtlwifi_new-dkms

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sudo dkms add ./rtlwifi_new-dkms

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sudo dkms build rtlwifi-new/0.6

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sudo dkms install rtlwifi-new/0.6

3. Reboot

If the issue is not solved in this way, you can also share the outputs of the following commands.

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apt install sysfsutils

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systool -vm rtl8723be

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modinfo rtl8723be

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dkms status

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iwconfig

[Figroth]

@kelebek333
Yep. This worked for me. Thank you very much for the tip.

[philrimer]

Also wanted to thank kelebek333 for those steps. That also fixed my rtl8723be. That odd thing with mine was that it was working fine with kernel 4.15.0-20 once I added the ant_sel=2 option. Upgraded to the latest kernel and boom, no longer worked. Tried mucking with all the settings and nothing would work. reboot back on old kernel and worked fine. Just followed your steps to install the latest drives on 4.15.0-47 and now it is working.

Thank you.

[JeremyB]

The ant_sel=2 should only be needed on some HP laptops as they are known to only use 1 antenna wire on a couple Realtek wifi cards, the RTL8723BE and RTL8723DE

[philrimer]

I have 19.1 installed on an HP Pavilion all in one. Just did a fresh install of 19.1 and the only way to get the wifi adapter to work was with that setting. But that only worked with the -20 kernel.

[JeremyB]

It should work up until 4.15.0-32 as that is when the bad commit was added

[DanielDias6969]

Good afternoon. I have the same problem, I want to install Linux Mint 19.1 via USB pen and the Wifi does not work. I've tried using Ubunto, Fedora, Deebin, etc and I've never been able to connect to the internet
Someone can help me? I have Windows 10 and it works great, Linux does not work.

From what I saw in Windows 10 the network card is: Realtek RTL8723BE 802.11n PCI-E NIC.

I do not have internet cable at home. The internet in my house does not work, I can see the internet and when I try to call at the end it gives an error and does not connect at all. I've tried other wifi networks and it works, but my home network does not work.

[Baldlygo]

You can try to install latest driver from rtlwifi-new github repo with following commands. You must disable secureboot before this.

1. Install requirements

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sudo apt-get install build-essential git dkms linux-headers-$(uname -r)

2. Download source and install rtlwifi-new driver with following commands

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git clone https://github.com/lwfinger/rtlwifi_new rtlwifi_new-dkms

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sudo dkms add ./rtlwifi_new-dkms

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sudo dkms build rtlwifi-new/0.6

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sudo dkms install rtlwifi-new/0.6

3. Reboot

If the issue is not solved in this way, you can also share the outputs of the following commands.

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apt install sysfsutils

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systool -vm rtl8723be

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modinfo rtl8723be

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dkms status

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iwconfig

May have given myself a big problem. I have just run these commands and forgot to take off secure boot. Taking off secure boot now prompts me for a password. If I enter the password could I lose my win10 wifi access which was working fine before?
Urgent help much appreciated.

If I choose ESC to not accept the pending change does this my change will be discarded?