Qualcomm Atheros QCA9377 wifi 802.11ac very unstable and low speed

[Rafael R. Vieira]

rafa@acer:~$ sudo lshw -C network
[sudo] senha para rafa:
  *-network
       descrição: Ethernet interface
       produto: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       fabricante: Realtek Semiconductor Co., Ltd.
       ID físico: 0.1
       informações do barramento: pci@0000:01:00.1
       nome lógico: enp1s0f1
       versão: 12
       serial: 08:97:98:63:7d:2e
       capacidade: 1Gbit/s
       largura: 64 bits
       clock: 33MHz
       capacidades: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuração: autonegotiation=on broadcast=yes driver=r8169 firmware=rtl8411-2_0.0.1 07/08/13 latency=0 link=no multicast=yes port=MII
       recursos: irq:16 porta de E/S:3000(tamanho=256) memória:b1204000-b1204fff memória:b1200000-b1203fff
  *-network
       descrição: Interface sem fio
       produto: QCA9377 802.11ac Wireless Network Adapter
       fabricante: Qualcomm Atheros
       ID físico: 0
       informações do barramento: pci@0000:02:00.0
       nome lógico: wlp2s0
       versão: 31
       serial: a4:63:a1:0e:bc:42
       largura: 64 bits
       clock: 33MHz
       capacidades: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuração: broadcast=yes driver=ath10k_pci driverversion=5.3.0-40-generic firmware=WLAN.TF.2.1-00021-QCARMSWP-1 ip=192.168.1.3 latency=0 link=yes multicast=yes wireless=IEEE 802.11
       recursos: irq:132 memória:b1000000-b11fffff

Download speed around 100-600Kb/s on 5GHz connection using WPA/WPA2.

Notebook ACER ASPIRE 3 A315-53-343Y

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1867559

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Sergey (sergeysi779)]

I have Acer Aspire A315-42G with the same WiFi adapter and suffer from the same bug. On Windows 10 I get 200Mb/s download speed (limited by Internet provider, sorry, don't have anything else to test on LAN), on Ubuntu 20.04 at the same spot I get 30Mb/s download speed. My region settings:
$ iw reg get
global
country RU: DFS-UNSET
 (2400 - 2483 @ 40), (N/A, 20), (N/A)
 (5150 - 5350 @ 160), (N/A, 20), (N/A), NO-OUTDOOR
 (5650 - 5850 @ 160), (N/A, 20), (N/A), NO-OUTDOOR
 (57000 - 66000 @ 2160), (N/A, 40), (N/A), NO-OUTDOOR

[Kyra Werþo (kyrawertho)]

I'm on an Acer Aspire F15 and the connection always drops after a few minutes until I manually reconnect.

I can solve it with this:

From /lib/firmware/ath10k/QCA9377/hw1.0/
- delete firmware-6.bin
- overwrite firmware-5.bin with https://github.com/kvalo/ath10k-firmware/QCA9377/hw1.0/firmware-5.bin_WLAN.TF.1.0-00023-QCATFSWPZ-1

However, every time the firmware gets updated, I have to do this again.

Not sure if related, but dmesg keeps giving:
ath10k_pci 0000:03:00.0: unsupported HTC service id: 1536