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I am using Ubuntu 14.04 on my HP 15-r204TX. When I start Ubuntu Wifi works fine but after 2-3 mins the browser shows no internet connection. Turning WiFi off and back on doesn't fix it and I'm not able to switch networks - it shows "connecting" and never gets connected. If I restart, it works again for 2-3 minutes.

$ lspci -knn | grep Net -A2
0a:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter [10ec:b723]
    Subsystem: Hewlett-Packard Company Device [103c:2231]
    Kernel driver in use: rtl8723be
Zanna
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FacingIssue
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1 Answers1

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Run the following commands, one line at a time in the terminal Ctrl+ALT+T):

echo "options iwlwifi 11n_disable=1" | sudo tee /etc/modprobe.d/iwlwifi.conf
sudo modprobe -rfv iwldvm
sudo modprobe -rfv iwlwifi
sudo modprobe -v iwlwifi

What it will do? The 11n_disable option disables 802.11n features. Adding it to /etc/modprobe.d/iwlwifi.conf makes the change persist after reboots (because it will be part of the module config). The modprobe -rfv commands are removing the kernel modules iwldvm and iwlwifi, and finally the last line modprobe -v is adding iwlwifi back in.

To know what those kernel modules are/do, you can run modinfo <module name> | grep description, which will tell you the following:

iwlwifi is an Intel(R) Wireless WiFi driver for Linux (generic Intel drivers)

iwldvm is Intel(R) Wireless WiFi Link AGN driver for Linux (more specific drivers)

Sinscary
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