Killer WiFi card keeps disconnecting due to latest firmware

Killer WiFi card keeps disconnecting due to latest firmware

[Nicola Mori]

Hi, I have an issue with the WiFi card in my laptop, that keeps 
disconnecting from the network in a strange way: randomly every 1-2 
hours I can't access web pages or even ping the gateway, but existing 
connections (like existing ssh sessions or Zoom videoconferences) 
continue to work. The only solution is to restart the network connection.

The fix for me has been to downgrade the firmware by removing 
/usr/lib/firmware/ath10k/QCA6174/hw3.0/firmware-6.bin so that 
/usr/lib/firmware/ath10k/QCA6174/hw3.0/firmware-4.bin is used; with 
this, I have no issues.

The problem is described in details in this Archlinux forum thread:

   https://bbs.archlinux.org/viewtopic.php?pid=1898028

I can provide additional information if needed.
Thanks,

Nicola

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Re: Killer WiFi card keeps disconnecting due to latest firmware

[Kalle Valo]

Nicola Mori <nicolamori@aol.com> writes:

> Hi, I have an issue with the WiFi card in my laptop, that keeps
> disconnecting from the network in a strange way: randomly every 1-2 
> hours I can't access web pages or even ping the gateway, but existing
> connections (like existing ssh sessions or Zoom videoconferences)
> continue to work. The only solution is to restart the network
> connection.
>
> The fix for me has been to downgrade the firmware by removing
> /usr/lib/firmware/ath10k/QCA6174/hw3.0/firmware-6.bin so that
> /usr/lib/firmware/ath10k/QCA6174/hw3.0/firmware-4.bin is used; with
> this, I have no issues.

These firmware filenames tell nothing to me (-6 and -4 are just
interface version numbers), I need the exact firmware versions of which
works and which doesn't. 'dmesg | grep ath10k' is the best way to get
them.

Also adding Wen to the loop.

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Re: Killer WiFi card keeps disconnecting due to latest firmware

[Kalle Valo]

Kalle Valo <kvalo@codeaurora.org> writes:

> Nicola Mori <nicolamori@aol.com> writes:
>
>> Hi, I have an issue with the WiFi card in my laptop, that keeps
>> disconnecting from the network in a strange way: randomly every 1-2 
>> hours I can't access web pages or even ping the gateway, but existing
>> connections (like existing ssh sessions or Zoom videoconferences)
>> continue to work. The only solution is to restart the network
>> connection.
>>
>> The fix for me has been to downgrade the firmware by removing
>> /usr/lib/firmware/ath10k/QCA6174/hw3.0/firmware-6.bin so that
>> /usr/lib/firmware/ath10k/QCA6174/hw3.0/firmware-4.bin is used; with
>> this, I have no issues.
>
> These firmware filenames tell nothing to me (-6 and -4 are just
> interface version numbers), I need the exact firmware versions of which
> works and which doesn't. 'dmesg | grep ath10k' is the best way to get
> them.
>
> Also adding Wen to the loop.

For some reason I don't see Nicola's reply in the list, I'll copy it
below just in case. So it looks like WLAN.RM.4.4.1 has a regression.
Wen, what do you think?

----------------------------------------------------------------------
Hi Kalle, thanks for replying. This is the output of 'dmesg | grep
ath10k' when using the firmware file that works:

1448:[    3.485923] ath10k_pci 0000:3b:00.0: enabling device (0000 -> 0002)
1449:[    3.489776] ath10k_pci 0000:3b:00.0: pci irq msi oper_irq_mode
2 irq_mode 0 reset_mode 0
1480:[    3.845150] ath10k_pci 0000:3b:00.0: qca6174 hw3.2 target
0x05030000 chip_id 0x00340aff sub 1a56:1535
1481:[    3.845151] ath10k_pci 0000:3b:00.0: kconfig debug 1 debugfs 1
tracing 1 dfs 0 testmode 0
1482:[    3.845545] ath10k_pci 0000:3b:00.0: firmware ver
WLAN.RM.2.0-00180-QCARMSWPZ-1 api 4 features
wowlan,ignore-otp,no-4addr-pad crc32 75dee6c5
1487:[    3.909684] ath10k_pci 0000:3b:00.0: board_file api 2 bmi_id
N/A crc32 4ac0889b
1507:[    3.986187] ath10k_pci 0000:3b:00.0: unsupported HTC service
id: 1536
1508:[    4.007720] ath10k_pci 0000:3b:00.0: htt-ver 3.26 wmi-op 4
htt-op 3 cal otp max-sta 32 raw 0 hwcrypto 1
1530:[    4.459620] ath10k_pci 0000:3b:00.0: unsupported HTC service
id: 1536

And this is when using the faulty firmware file:

1411:[    3.161194] ath10k_pci 0000:3b:00.0: enabling device (0000 -> 0002)
1413:[    3.163852] ath10k_pci 0000:3b:00.0: pci irq msi oper_irq_mode
2 irq_mode 0 reset_mode 0
1446:[    3.544236] ath10k_pci 0000:3b:00.0: qca6174 hw3.2 target
0x05030000 chip_id 0x00340aff sub 1a56:1535
1447:[    3.544237] ath10k_pci 0000:3b:00.0: kconfig debug 1 debugfs 1
tracing 1 dfs 0 testmode 0
1448:[    3.544560] ath10k_pci 0000:3b:00.0: firmware ver
WLAN.RM.4.4.1-00140-QCARMSWPZ-1 api 6 features wowlan,ignore-otp,mfp
crc32 29eb8ca1
1461:[    3.636783] ath10k_pci 0000:3b:00.0: board_file api 2 bmi_id
N/A crc32 4ac0889b
1469:[    3.711916] ath10k_pci 0000:3b:00.0: unsupported HTC service
id: 1536
1470:[    3.730945] ath10k_pci 0000:3b:00.0: htt-ver 3.60 wmi-op 4
htt-op 3 cal otp max-sta 32 raw 0 hwcrypto 1
1534:[    4.378847] ath10k_pci 0000:3b:00.0: unsupported HTC service
id: 1536
----------------------------------------------------------------------

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Re: Killer WiFi card keeps disconnecting due to latest firmware

[Wen Gong]

On 2020-04-22 15:14, Kalle Valo wrote:
> Kalle Valo <kvalo@codeaurora.org> writes:
> 
>> Nicola Mori <nicolamori@aol.com> writes:
>> 
>>> Hi, I have an issue with the WiFi card in my laptop, that keeps
>>> disconnecting from the network in a strange way: randomly every 1-2
>>> hours I can't access web pages or even ping the gateway, but existing
>>> connections (like existing ssh sessions or Zoom videoconferences)
>>> continue to work. The only solution is to restart the network
>>> connection.
Nicola Mori,
Could you tell us the AP model and AP configure(WPA-PSK/WEP...., ssid 
name/password...,dhcp timeout period...)?
We prepare to try it.

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Re: Killer WiFi card keeps disconnecting due to latest firmware

[Nicola Mori]

[-- Attachment #1.1: Type: text/plain, Size: 1896 bytes --]

Sending again from a different mail account due to multiple errors in 
previous attempts to reply to the list from my original account.

Wen, see below for the configuration of my AP.

Sorry for the noise,

Nicola

On 2020-04-23 19:54, Nicola Mori wrote:
> Hi Wen, thanks for replying. I'm using an AP provided by my ISP (TIM, 
> Italy) and it's a bit hard to understand the producer and the model. The 
>   web interface says:
> 
> Model: AGWIFIN
> Hardware version: L1s
> Firmware: AGAWI_4.0.7
> 
> About the configuration, I use:
> 
> - Channel: 6
> - Channel width: Auto 20 MHz / 40 MHz
> - SSID: TIM-67287725
> - authentication: WPA-PSK TKIP-AES 256 bit
> - encryption key: Wifi@Pepita2013
> 
> As for the dhcp lease time I was not able to recover it from the router 
> settings (maybe this basic model doesn't allow for setting it) but from 
> the logs in my pc I got this:
> 
> apr 23 15:01:30 stryke dhcpcd[34040]: wlan0: leased 192.168.1.2 for 
> 21600 seconds
> 
> I don't know if the above information is what you were after or if it is 
> sufficient, in case just let me know.
> Thanks again,
> 
> Nicola
> 
> On 23/04/20 11:14, Wen Gong wrote:
>> On 2020-04-22 15:14, Kalle Valo wrote:
>>> Kalle Valo <kvalo@codeaurora.org> writes:
>>>
>>>> Nicola Mori <nicolamori@aol.com> writes:
>>>>
>>>>> Hi, I have an issue with the WiFi card in my laptop, that keeps
>>>>> disconnecting from the network in a strange way: randomly every 1-2
>>>>> hours I can't access web pages or even ping the gateway, but existing
>>>>> connections (like existing ssh sessions or Zoom videoconferences)
>>>>> continue to work. The only solution is to restart the network
>>>>> connection.
>> Nicola Mori,
>> Could you tell us the AP model and AP configure(WPA-PSK/WEP...., ssid 
>> name/password...,dhcp timeout period...)?
>> We prepare to try it.


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Killer WiFi card keeps disconnecting due to latest firmware

[Elia Geretto]

Hi,

I am experiencing the same problem that Nicola Mori reported on 14th
April. The thread I am referring to is the one with the same subject as
this email.

From what I can understand, Kalle Valo and Wen Gong are trying to
reproduce the problem, but they had difficulties retrieving the correct
hardware. Since I can reproduce the issue with a different router,
probably easier to retrieve, I thought I would dump the information
here.

I have the exact same laptop as Nicola Mori, an XPS 15 9570 and I am
running Fedora 31 (kernel 5.6.8).

The wifi card is reported as:

3b:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter (rev 32)
	Subsystem: Bigfoot Networks, Inc. Device 1535
	Kernel driver in use: ath10k_pci
	Kernel modules: ath10k_pci

I have tried switching in and out a couple of firmwares with API 6 and
I can reproduce the problem with all the versions I tested:

WLAN.RM.4.4.1-00128-QCARMSWPZ-1
WLAN.RM.4.4.1-00132-QCARMSWP-1
WLAN.RM.4.4.1-00140-QCARMSWPZ-1 (default one on Fedora 31)
WLAN.RM.4.4.1-00151-QCARMSWPZ-2

Regarding the router, it is a Linksys E2500 v3, with firmware 3.0.05
(latest). I use both 2.4 GHz and 5 GHz wireless, with the same SSID.

As for the information regarding the wifi settings:
- Channel: Auto (DFS)
- Channel width: Auto (20 MHz or 40 MHz)
- Encryption: WPA2-Personal

Regarding reproduction, I would like to add that the issue happens
quite rarely. Using my laptop the whole day at max 4 meters from the
router, it happens only once or twice a day.

In addition, when I am unable to start new connections, and
applications like Zoom are still running perfectly, I can work around
the issue not only by disabling and re-enabling the wifi, but also
pinging my laptop from another device in the network. To clarify, when
I am experiencing the issue, if I ping my laptop from my phone, it
starts working correctly again.

I am not sure if this is related, but it happens often, but not
exclusively, when I am using Zoom for videoconferencing. However, I
cannot confirm that it is the cause.

Feel free to contact me for any additional information you may need.

Kind regards,
Elia Geretto


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