Ubuntu – Wi-Fi speed on the laptop with RTL8723DE is a bit slow and its range is also very low, what to do


My Wi-Fi connection seems to be very weak and the range is very low. It drops by two bars if I just move to the next room and by two if just step outside.

The speed is also not fast as compared to what I get from the router on my desktop .

My laptop is a HP laptop with RTL8723de module. Can anyone help me in bumping up my Wi-Fi speed?

Result of lspci -nnk | grep 0280 -A3:

03:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. Device [10ec:d723]
Subsystem: Hewlett-Packard Company Device [103c:8319]
Kernel driver in use: rtl8723de
Kernel modules: rtl8723de

Best Answer

  • Quite often, the weak signal is a symptom of the antenna wire being connected to connection #1 on the card when the default driver is expecting to see the signal at connection #2. Of course, you could open the laptop and switch the wire or you could try a driver parameter that permits antenna selection at the driver level.

    From the terminal:

    sudo modprobe -r rtl8723de
    sudo modprobe rtl8723de ant_sel=2

    Any improvement? If so, we'll write one conf file and make it permanent.

    If there is no improvement, try the sequence again with ant_sel=1and report the result.

    EDIT: Since you have determined that 2 is helpful, create a file that will make the parameter permanent:

    sudo -i
    echo "options rtl8723de ant_sel=2"  >  /etc/modprobe.d/rtl8723de.conf

    You should be all set.

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