Tools: Ubuntu Wi‑Fi Issue Resolution – Reference Guide (QCA9377)

System Information:
• OS: Ubuntu (NetworkManager based)
• Wi‑Fi Adapter: Qualcomm Atheros QCA9377
• Interface: wlp2s0 Core Issue:
• Wi‑Fi adapter detected and firmware loaded correctly.
• However, NetworkManager showed the Wi‑Fi device as "unavailable".
• Root cause identified: wpasupplicant service was corrupted or not functioning.
• NetworkManager depends on wpasupplicant to manage Wi‑Fi authentication. Symptoms Observed:
• nmcli device status → wifi unavailable
• wpa_supplicant service failed to start (fatal signal / core dump)
• iw dev scan showed networks (hardware and driver were working)
• NetworkManager unable to scan or connect Official Package Links:
• wpasupplicant: https://archive.ubuntu.com/ubuntu/pool/main/w/wpa/wpa_supplicant_2.10-6ubuntu1_amd64.deb • network-manager: https://archive.ubuntu.com/ubuntu/pool/main/n/network-manager/network-manager_1.36.6-0ubuntu2_amd64.deb Step 1: Reinstall required packages (online method)
sudo apt update
sudo apt install --reinstall wpasupplicant network-manager Offline method:
sudo dpkg -i wpa_supplicant*.deb
sudo dpkg -i network-manager*.deb Step 2: Restart services
sudo systemctl daemon-reexec
sudo systemctl restart wpasupplicant
sudo systemctl restart NetworkManager Step 3: Reboot system
sudo reboot Verification Commands:
nmcli device status
nmcli device wifi list
systemctl status wpasupplicant
systemctl status NetworkManager Expected Result:
• Wi‑Fi interface state changes from “unavailable” → “disconnected” or “connected”
• Available Wi‑Fi networks become visible
• Successful connection to wireless network Conclusion:
The issue was caused by a broken wpasupplicant service, not by hardware, driver, or firmware.
Reinstalling wpasupplicant and network-manager restored proper Wi‑Fi functionality. Templates let you quickly answer FAQs or store snippets for re-use. Are you sure you want to hide this comment? It will become hidden in your post, but will still be visible via the comment's permalink. Hide child comments as well For further actions, you may consider blocking this person and/or reporting abuse - wpasupplicant
- network-manager
- linux-firmware (already installed earlier)