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.

$ 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.

$ lsb_release -d
Description:    Ubuntu 20.04 LTS
$ uname -r
$ apt list --installed | grep "linux-generic"
linux-generic-hwe-20.04/focal-updates,focal-security,now amd64 [installed]

I've done these steps already: More wifi issues - Qualcomm Atheros QCA6174 ath10k_pci

This includes:

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 (WiFi DELL XPS 13 9360 keeps disconnecting with QCA6174 802.11ac Wireless Network Adapter) said to install a custom kernel module. I didn't do that, but I did run a few steps to see if it would help.

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 (Qualcomm QCA6174 unstable wifi 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.

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