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I have a HP Pavilion Laptop. The details of which, obtained by running the command lshw, are below:

product: HP Pavilion Notebook (N1J39EA#A2N)
    vendor: Hewlett-Packard
    version: Type1ProductConfigId
    serial: 5CD5291DWT
    width: 64 bits
    capabilities: smbios-2.8 dmi-2.8 smp vsyscall32

I switched from windows to Ubuntu 18.04 very recently. Initially I did face wifi weak signal issue. However, I fixed the issue by using the following commands:

sudo modprobe -rv rtl8723be
sudo modprobe -v rtl8723be ant_sel=2
sudo ip link set wlo1 up
sudo iw dev wlo1 scan
echo "options rtl8723be ant_sel=2" | sudo tee /etc/modprobe.d/rtl8723be.conf

Everything was working perfectly and then 2 days ago I updated my system and thereby the kernel got updated which in turn brought back wifi issue.

I tried to fix wifi issue by using the same old method but failed to do so. I also tried the following:

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

which also couldn't solve the issue. Then I went on to try the following:

sudo -i
echo "options rtl8723be ant_sel=2"  >  /etc/modprobe.d/rtl8723be.conf
exit
reboot

the same result with same problem. output of the command

lspci -knn | grep Net -A3; rfkill list

is as follows:

08:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter [10ec:b723]
    Subsystem: Hewlett-Packard Company RTL8723BE PCIe Wireless Network Adapter [103c:804c]
    Kernel driver in use: rtl8723be
    Kernel modules: rtl8723be
09:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller [10ec:8136] (rev 0a)
0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
1: hci0: Bluetooth
    Soft blocked: yes
    Hard blocked: no

References:

Weak Signal

inconsistent connection

weak signal and disconnection

Shah Aadil
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  • This worked for me: https://askubuntu.com/questions/914048/realtek-rtl8723be-weak-wifi-signal-and-disconnects – Antoni Duda Aug 30 '18 at 16:07
  • Possible duplicate of [Wifi networks not found ubuntu 18.04 with rtl8723be.](https://askubuntu.com/questions/1069153/wifi-networks-not-found-ubuntu-18-04-with-rtl8723be) It seems kernel v4.15.0-33 has a bug. – pomsky Sep 02 '18 at 12:47
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    Alternatively, try this: https://askubuntu.com/questions/1068826/wifi-doesnt-work-on-ubuntu-18-04-1-lts – pomsky Sep 02 '18 at 13:06
  • [link] https://askubuntu.com/questions/1068826/wi-fi-doesnt-work-on-ubuntu-18-04-1-lts-rtl8723be this worked for me – Shah Aadil Sep 17 '18 at 15:30

0 Answers0