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Thread: Qualcomm QCA6174 - Wifi Unstable - Dell XPS 13 9380 - Ubuntu 20.04 Focal

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    Qualcomm QCA6174 - Wifi Unstable - Dell XPS 13 9380 - Ubuntu 20.04 Focal

    I have Ubuntu 20.04 installed on Dell XPS 13 9380 (Service Tag: 8SGZPV2) with Qualcomm QCA6174 wifi chip. Every 2-5 minutes, the wifi signal drops off then comes back online after a few seconds. This is a fresh install of Ubuntu Desktop through the usual methods (ie, not a custom OS/kernel build). The original OS was Windows 10 (no wifi problems), and Ubuntu was installed after a hard drive wipe (ie, not a dual-boot).

    Here is my wifi hardware.
    Code:
    $ lspci
    02:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter (rev 32)
    $ dmesg | grep ath
    [   23.571480] ath10k_pci 0000:02:00.0: enabling device (0000 -> 0002)
    [   23.579850] ath10k_pci 0000:02:00.0: pci irq msi oper_irq_mode 2 irq_mode 0 reset_mode 0
    [   23.862206] ath10k_pci 0000:02:00.0: qca6174 hw3.2 target 0x05030000 chip_id 0x00340aff sub 1a56:143a
    [   23.862209] ath10k_pci 0000:02:00.0: kconfig debug 0 debugfs 1 tracing 1 dfs 0 testmode 0
    [   23.862620] ath10k_pci 0000:02:00.0: firmware ver WLAN.RM.4.4.1-00140-QCARMSWPZ-1 api 6 features wowlan,ignore-otp,mfp crc32 29eb8ca1
    [   23.927110] ath10k_pci 0000:02:00.0: board_file api 2 bmi_id N/A crc32 4ac0889b
    [   24.000120] ath10k_pci 0000:02:00.0: unsupported HTC service id: 1536
    [   24.020001] ath10k_pci 0000:02:00.0: htt-ver 3.60 wmi-op 4 htt-op 3 cal otp max-sta 32 raw 0 hwcrypto 1
    [   24.108647] ath: EEPROM regdomain: 0x6c
    [   24.108647] ath: EEPROM indicates we should expect a direct regpair map
    [   24.108648] ath: Country alpha2 being used: 00
    [   24.108649] ath: Regpair used: 0x6c
    [   24.115986] ath10k_pci 0000:02:00.0 wlp2s0: renamed from wlan0
    [   25.553827] ath10k_pci 0000:02:00.0: unsupported HTC service id: 1536
    Here is my OS set up.
    Code:
    $ lsb_release -d
    Description:    Ubuntu 20.04 LTS
    $ uname -r
    5.4.0-39-generic
    $ apt list --installed | grep "linux-generic"
    linux-generic-hwe-20.04/focal-updates,focal-security,now 5.4.0.39.42 amd64 [installed]
    I've done these steps already: https://askubuntu.com/questions/8780...174-ath10k-pci

    This includes:
    Code:
    sudo apt-get install --reinstall linux-firmware
    sudo sed -i 's/wifi.powersave = 3/wifi.powersave = 2/' /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf
    There were no errors. I rebooted. And the problem persisted.

    Another thread (https://askubuntu.com/questions/8704...reless-network) said to install a custom kernel module. I downloaded the most recent module (firmware-6.bin...) in github directory ath10k-firmware/QCA6174/hw3.0/4.4.1.c3/. And replaced the /lib/firmware/ath10k/QCA6174/hw3.0/firmware-6.bin file with the one just downloaded. I then ran the following commands.
    Code:
    sudo modprobe -r ath10k_pci ath10k_core
    sudo modprobe ath10k_pci
    sudo modprobe ath10k_core
    The problem of the wifi signal dropping and coming back up persisted.

    Another thread (https://askubuntu.com/questions/1200...-and-bluetooth) also mentioned installing a custom firmware (https://github.com/thebitstick/surfacego-wifi).

    I fear bricking my laptop if I try something for a different device altogether. And so I haven't installed any custom kernel modules or firmware. Is this really the answer? If so, which one?

    Please help.
    Last edited by pasueno; 1 Week Ago at 03:16 PM.

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