[SOLVED] WiFi signal way too weak on Mint, working ok in Windows dual boot

[Alejargueta]

I have installed Mint on a HP laptop, alongside with the built in Windows 10. I had some problems cause Mint didn't seem to recognize the wireless card and it was not activated. However, WiFi signal is way too weak on Mint, i am about 2m of the router and have 43%. On the opposite, if I work on windows the signal seems OK. I'm kinda bummed cause I need Linux to work, I hope someone can help me.

Here are my machine specifications.

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System:    Host: alejandro-HP-Laptop-14-cm0xxx Kernel: 4.15.0-39-generic x86_64
           bits: 64 gcc: 7.3.0
           Desktop: Cinnamon 3.8.9 (Gtk 3.22.30-1ubuntu1)
           Distro: Linux Mint 19 Tara
Machine:   Device: laptop System: HP product: HP Laptop 14-cm0xxx serial: N/A
           Mobo: HP model: 84A2 v: 84.16 serial: N/A
           UEFI: AMI v: F.10 date: 05/17/2018
Battery    BAT0: charge: 21.9 Wh 52.6% condition: 41.6/41.6 Wh (100%)
           model: Hewlett-Packard Primary status: Charging
CPU:       Dual core AMD Ryzen 3 2200U with Radeon Vega Mobile Gfx (-MT-MCP-) 
           arch: Zen rev.0 cache: 1024 KB
           
           flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm) bmips: 9980
           clock speeds: max: 2500 MHz 1: 1653 MHz 2: 1673 MHz 3: 1687 MHz
           4: 1689 MHz
Graphics:  Card: Advanced Micro Devices [AMD/ATI] Vega [Radeon Vega 8 Mobile]
           bus-ID: 05:00.0
           Display Server: x11 (X.Org 1.19.6 )
           drivers: ati,amdgpu (unloaded: modesetting,fbdev,vesa,radeon)
           Resolution: 1366x768@60.07hz
           OpenGL: renderer: AMD RAVEN (DRM 3.23.0 / 4.15.0-39-generic, LLVM 6.0.0)
           version: 4.5 Mesa 18.0.5 Direct Render: Yes
Audio:     Card-1 Advanced Micro Devices [AMD] Device 15e3
           driver: snd_hda_intel bus-ID: 05:00.6
           Card-2 Advanced Micro Devices [AMD/ATI] Device 15de
           driver: snd_hda_intel bus-ID: 05:00.1
           Sound: Advanced Linux Sound Architecture v: k4.15.0-39-generic
Network:   Card-1: Realtek RTL8111/8168/8411 PCIE Gigabit Ethernet Controller
           driver: r8169 v: 2.3LK-NAPI port: f000 bus-ID: 03:00.0
           IF: eno1 state: down mac: <filter>
           Card-2: Realtek Device d723
           driver: rtl8723de port: e000 bus-ID: 04:00.0
           IF: wlp4s0 state: up speed: N/A duplex: N/A mac: <filter>
Drives:    HDD Total Size: 1000.2GB (1.7% used)
           ID-1: /dev/sda model: ST1000LM035 size: 1000.2GB temp: 38C
Partition: ID-1: / size: 303G used: 16G (6%) fs: ext4 dev: /dev/sda6
RAID:      No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors:   System Temperatures: cpu: 47.0C mobo: 0.0C gpu: 0.0
           Fan Speeds (in rpm): cpu: N/A
Info:      Processes: 207 Uptime: 30 min Memory: 1609.3/3459.5MB
           Init: systemd runlevel: 5 Gcc sys: 7.3.0
           Client: Shell (bash 4.4.191) inxi: 2.3.56 

[Pierre]

Open Terminal and run these:

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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.

[Alejargueta]

Thanks, here's the URL.

http://termbin.com/mbp4

[JeremyB]

Try

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sudo modprobe -r rtl8723de && sleep 5 && sudo modprobe rtl8723de ant_sel=2

If that is better

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echo "options rtl8723de ant_sel=2" | sudo tee /etc/modprobe.d/rtl8723de.conf

[Alejargueta]

Thanks! the last codes really did work. Now i have decent signal.