Archer C7 v2 bad 5GHz wireless performance with 19.07

[gotschi]

Hi,

since the Upgrade from 18 to 19.07 I experience a worse wireless performance on my Archer C7v2 than before, anybody know what I did wrong?
I cahnged to ath97, thought that would make things better

config wifi-device 'radio0'
	option type 'mac80211'
	option hwmode '11a'
	option path 'pci0000:00/0000:00:00.0'
	option htmode 'VHT80'
	option legacy_rates '0'
	option channel '36'

config wifi-iface 'default_radio0'
	option device 'radio0'
	option network 'lan'
	option mode 'ap'
	option key 'pw'
	option ssid 'ssid'
	option encryption 'psk2+tkip+ccmp'

config wifi-device 'radio1'
	option type 'mac80211'
	option hwmode '11g'
	option path 'platform/ahb/ahb:apb/18100000.wmac'
	option htmode 'HT20'
	option channel '6'
	option legacy_rates '0'
	option country 'AT'
	option txpower '20'

config wifi-iface 'default_radio1'
	option device 'radio1'
	option network 'lan'
	option mode 'ap'
	option key 'pw'
	option ssid 'ssid'
	option encryption 'psk2+tkip+ccmp'
	option disabled '1'

config wifi-iface 'wifinet2'
	option network 'lan'
	option ssid 'ssid2'
	option encryption 'psk2+tkip+ccmp'
	option device 'radio1'
	option mode 'ap'
	option hidden '1'
	option key 'pw2'
	option disassoc_low_ack '0'

Afaik I'm using the stock ath10k-firmware-qca988x-ct v2019-10-03-d622d160-1
kmod-ath10k-ct v4.14.162+2019-09-09-5e8cd86f-1
my macbook connected to it as the only client presents me the following ping behaviour with about 2 meters distance to the router:

edit: when I try to stream something (airplay music, youtube video, whatever)
the pings even time out!

thank you for any suggestions!

[tmomas]

Related:

Archer C7 v2 bad WiFi range 5 GHz since 19.07.0

19.07 switched 5ghz drivers. Have you tried reverting to the ath10k non -ct firmware and driver to see if it is better. I replaced them on my bthub 5a to get mesh working, but while the -ct firmware was installed, I had also noticed some issues with my lg TV occasionally losing 5ghz connection when using a pre-release candidate version of 19.07. 19.07 BT Hub 5A: Mesh not working on 5ghz radio -> must load driver with rawmode=1 to add mesh interfaces Uninstall ath10k-firmware-qca988x-ct and kmo…

[gotschi]

hm, I forgot that I was on cable before

unfortunately this doesn't change much..

and I also set it to channel 36 but it's not changing lower than 40... higher channels apply but 36 gets ignored

[SteMax97]

There was a problem related to hostapd (https://github.com/openwrt/mt76/issues/348) which was resolved in a following update. It may be the solution to your problem.
This bug would lead to high ping with the 5GHz interface. To apply a temporary workaround you might want to change Wifi Country Code to 00 (World) (you might also need to use the command "iw reg set 00").
The bug was resolved, however the 19.07 bin you find on Openwrt haven't been updated.
You should download the 19.07.1 version on the website (or use ImageBuilder with the 19.07.1 version). With the latest version you'd be able to set the right country and not have high latency.

[gotschi]

way better in 19.07.1!

Thank you guys!

[dalanmiller]

Would you mind sharing your final config? Also did you upgrade to the latest stable release to get the hostapd fixes or the latest dev release?

[zorxd]

Hi
is it possible this bug is not 100% solved with 19.07.1?
I still get high pings on my 5 GHz interface. But only some time after the client connects.

[psyborg]

more likely than possible