5G wifi doesn't really work on my tp-link Archer C7 v2

e9hack e9hack at gmail.com
Thu May 19 06:04:05 PDT 2022


Am 19.05.2022 um 14:07 schrieb Hauke Mehrtens:
> On 5/16/22 15:54, e9hack wrote:
>> Hi,
>>
>> I've trouble with the following commit:
>>
>> commit    3aa96efa24c13c6e0aafa5ad826f3f95a3bd74f9
>> mac80211: Update to version 5.15.33-1
>>
>> After this commit the 5G wifi interface doesn't start properly. The interfaces are visible with ifconfig, but it isn't visible on air. To get 5G working, I must restart hostapd. I'm doing this with the following command 'wifi down; sleep 5; killall -9 hostapd; sleep 5; wifi &'.
>>
>> Any idea, what is wrong in mac80211 5.15.33-1?
>>
>> Regards,
>> Hartmut
>>
> 
> Hi Hartmut,
> 
> Do you have some more details?
Not yet.

> Do you see any error message in logread?
No. It looks similar. In both versions (5.15.8-1 and 5.15.33-1), driver and firmware
are load and hostapd does setup the interfaces. The only difference is the first
output related to country variants from EEPROM, but I think this printed text only.
It is different for ath9k and ath10k.

old:
Sun May 15 16:37:43 2022 kern.info kernel: [   29.082747] ath10k_pci 0000:00:00.0: enabling device (0000 -> 0002)
Sun May 15 16:37:43 2022 kern.info kernel: [   29.091400] ath10k_pci 0000:00:00.0: pci irq legacy oper_irq_mode 1 irq_mode 0 reset_mode 0
Sun May 15 16:37:43 2022 kern.info kernel: [   31.686602] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: errors=remount-ro
Sun May 15 16:37:43 2022 kern.info kernel: [   34.664574] ath10k_pci 0000:00:00.0: qca988x hw2.0 target 0x4100016c chip_id 0x043202ff sub 0000:0000
Sun May 15 16:37:43 2022 kern.info kernel: [   34.673993] ath10k_pci 0000:00:00.0: kconfig debug 0 debugfs 1 tracing 0 dfs 1 testmode 0
Sun May 15 16:37:43 2022 kern.info kernel: [   34.687040] ath10k_pci 0000:00:00.0: firmware ver 10.2.4-1.0-00047 api 5 features no-p2p,raw-mode,mfp,allows-mesh-bcast crc32 35bd9258
Sun May 15 16:37:43 2022 kern.info kernel: [   35.199254] ath10k_pci 0000:00:00.0: board_file api 1 bmi_id N/A crc32 bebc7c08
Sun May 15 16:37:43 2022 kern.warn kernel: [   35.226156] (backports-5.15.8-1/drivers/net/wireless/ath/ath10k/core.c:2213) Found a calibration nvmem-cell
Sun May 15 16:37:43 2022 kern.info kernel: [   36.420550] ath10k_pci 0000:00:00.0: htt-ver 2.1 wmi-op 5 htt-op 2 cal nvmem max-sta 128 raw 0 hwcrypto 1
Sun May 15 16:37:43 2022 kern.debug kernel: [   36.564054] ath: EEPROM regdomain sanitized
Sun May 15 16:37:43 2022 kern.debug kernel: [   36.564066] ath: EEPROM regdomain: 0x64
Sun May 15 16:37:43 2022 kern.debug kernel: [   36.564071] ath: EEPROM indicates we should expect a direct regpair map
Sun May 15 16:37:43 2022 kern.debug kernel: [   36.564090] ath: Country alpha2 being used: 00
Sun May 15 16:37:43 2022 kern.debug kernel: [   36.564095] ath: Regpair used: 0x64
Sun May 15 16:37:43 2022 kern.warn kernel: [   36.640956] (backports-5.15.8-1/drivers/net/wireless/ath/ath9k/init.c:695) ath9k_of_init()
Sun May 15 16:37:43 2022 kern.warn kernel: [   36.650798] (backports-5.15.8-1/drivers/net/wireless/ath/ath9k/init.c:608) Found a calibration nvmem-cell.
Sun May 15 16:37:43 2022 kern.warn kernel: [   36.670784] (backports-5.15.8-1/drivers/net/wireless/ath/ath9k/init.c:615) Size of calibration nvmem-cell is 1088 bytes and crc is 0f7c.
Sun May 15 16:37:43 2022 kern.debug kernel: [   36.687430] ath: EEPROM regdomain sanitized
Sun May 15 16:37:43 2022 kern.debug kernel: [   36.699887] ath: EEPROM regdomain: 0x64
Sun May 15 16:37:43 2022 kern.debug kernel: [   36.699893] ath: EEPROM indicates we should expect a direct regpair map
Sun May 15 16:37:43 2022 kern.debug kernel: [   36.699913] ath: Country alpha2 being used: 00
Sun May 15 16:37:43 2022 kern.debug kernel: [   36.699918] ath: Regpair used: 0x64
Sun May 15 16:37:43 2022 kern.debug kernel: [   36.716823] ieee80211 phy1: Selected rate control algorithm 'minstrel_ht'
Sun May 15 16:37:43 2022 kern.info kernel: [   36.718638] ieee80211 phy1: Atheros AR9550 Rev:0 mem=0xb8100000, irq=12

new:
Sat May 14 11:09:05 2022 kern.info kernel: [   29.384532] ath10k_pci 0000:00:00.0: enabling device (0000 -> 0002)
Sat May 14 11:09:05 2022 kern.info kernel: [   29.393189] ath10k_pci 0000:00:00.0: pci irq legacy oper_irq_mode 1 irq_mode 0 reset_mode 0
Sat May 14 11:09:05 2022 kern.info kernel: [   31.920332] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: errors=remount-ro
Sat May 14 11:09:05 2022 kern.info kernel: [   35.264855] ath10k_pci 0000:00:00.0: qca988x hw2.0 target 0x4100016c chip_id 0x043202ff sub 0000:0000
Sat May 14 11:09:05 2022 kern.info kernel: [   35.274269] ath10k_pci 0000:00:00.0: kconfig debug 0 debugfs 1 tracing 0 dfs 1 testmode 0
Sat May 14 11:09:05 2022 kern.info kernel: [   35.287315] ath10k_pci 0000:00:00.0: firmware ver 10.2.4-1.0-00047 api 5 features no-p2p,raw-mode,mfp,allows-mesh-bcast crc32 35bd9258
Sat May 14 11:09:05 2022 kern.info kernel: [   35.945834] ath10k_pci 0000:00:00.0: board_file api 1 bmi_id N/A crc32 bebc7c08
Sat May 14 11:09:05 2022 kern.warn kernel: [   35.973350] (backports-5.15.33-1/drivers/net/wireless/ath/ath10k/core.c:2230) Found a calibration nvmem-cell
Sat May 14 11:09:05 2022 kern.info kernel: [   37.248472] ath10k_pci 0000:00:00.0: htt-ver 2.1 wmi-op 5 htt-op 2 cal nvmem max-sta 128 raw 0 hwcrypto 1
Sat May 14 11:09:05 2022 kern.debug kernel: [   37.394052] ath: EEPROM regdomain: 0x0
Sat May 14 11:09:05 2022 kern.debug kernel: [   37.394061] ath: EEPROM indicates default country code should be used
Sat May 14 11:09:05 2022 kern.debug kernel: [   37.394066] ath: doing EEPROM country->regdmn map search
Sat May 14 11:09:05 2022 kern.debug kernel: [   37.394080] ath: country maps to regdmn code: 0x3a
Sat May 14 11:09:05 2022 kern.debug kernel: [   37.394086] ath: Country alpha2 being used: US
Sat May 14 11:09:05 2022 kern.debug kernel: [   37.394091] ath: Regpair used: 0x3a
Sat May 14 11:09:05 2022 kern.warn kernel: [   37.481401] (backports-5.15.33-1/drivers/net/wireless/ath/ath9k/init.c:695) ath9k_of_init()
Sat May 14 11:09:05 2022 kern.warn kernel: [   37.481535] (backports-5.15.33-1/drivers/net/wireless/ath/ath9k/init.c:608) Found a calibration nvmem-cell.
Sat May 14 11:09:05 2022 kern.warn kernel: [   37.500764] (backports-5.15.33-1/drivers/net/wireless/ath/ath9k/init.c:615) Size of calibration nvmem-cell is 1088 bytes and crc is 0f7c.
Sat May 14 11:09:05 2022 kern.debug kernel: [   37.517525] ath: EEPROM regdomain: 0x0
Sat May 14 11:09:05 2022 kern.debug kernel: [   37.530064] ath: EEPROM indicates default country code should be used
Sat May 14 11:09:05 2022 kern.debug kernel: [   37.530069] ath: doing EEPROM country->regdmn map search
Sat May 14 11:09:05 2022 kern.debug kernel: [   37.530083] ath: country maps to regdmn code: 0x3a
Sat May 14 11:09:05 2022 kern.debug kernel: [   37.530089] ath: Country alpha2 being used: US
Sat May 14 11:09:05 2022 kern.debug kernel: [   37.530094] ath: Regpair used: 0x3a
Sat May 14 11:09:05 2022 kern.debug kernel: [   37.546975] ieee80211 phy1: Selected rate control algorithm 'minstrel_ht'
Sat May 14 11:09:05 2022 kern.info kernel: [   37.548814] ieee80211 phy1: Atheros AR9550 Rev:0 mem=0xb8100000, irq=12

The nvmem-cell stuff is from me, because I did change, how the calibration data
is load for the ath9k at a tp-link wdr3600. This router doesn't have an issue.
The affected router is the tp-link archer C7 v2. I'm using the kmod-ath10k
driver and not kmod-ath10k-ct.

> What hardware was this happening on?
Router is a tp-link archer C7 v2. Firmware for ath10k is qca988x.

> 
> Did it work again when you reverted the linked commit?
If I revert this commit only, backports-5.15.8-1 does work with further commits too.

Regards,
Hartmut




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