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backes

Member

Registered: 2014-07-12

Posts: 9

wifi packet loss

Hey,

I experience sporadically unstable wifi on a desktop machine. I don't know how to troubleshoot the issue because I haven't noticed a pattern yet and the logs seem meaningless. ping shows the symptoms:

This pinged over ipv6

$ ping youtube.com
^C
--- youtube.com ping statistics ---
101 packets transmitted, 63 received, 37.6238% packet loss, time 114870ms
rtt min/avg/max/mdev = 2.700/36.830/405.747/64.561 ms

And this over ipv4

$ ping 8.8.8.8
^C
--- 8.8.8.8 ping statistics ---
220 packets transmitted, 175 received, 20.4545% packet loss, time 219907ms
rtt min/avg/max/mdev = 2.659/53.211/407.107/55.769 ms

This is the only machine where it occurs. Other laptops (and phones) in the household don't have an issue so I guess that it's not an issue of the router.

journalctl doesn't show any messages during the periods. The last messages are router advertisements on wlp3s0. The same for  "dmseg -w", no new messages.

My motherboard has the following network controllers, but as I'm only using wlp3s0,  03:00.0  should be the relevant one.

03:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter (rev 32)
	Subsystem: ASUSTeK Computer Inc. QCA6174 802.11ac Wireless Network Adapter
	Kernel driver in use: ath10k_pci
	Kernel modules: ath10k_pci
04:00.0 Network controller: Wilocity Ltd. Wil6200 802.11ad Wireless Network Adapter (rev 02)
	Subsystem: Wilocity Ltd. Wil6200 802.11ad Wireless Network Adapter
	Kernel driver in use: wil6210
	Kernel modules: wil6210

When I shut the interface down and up again, I see this in the logs:

[27372.167129] IPv6: ADDRCONF(NETDEV_CHANGE): wlp3s0: link becomes ready
[27557.568365] wlp3s0: Connection to AP ipv6 lost
[27558.442622] kauditd_printk_skb: 1 callbacks suppressed
[27562.613622] wlp3s0: authenticate with ipv6
[27562.657905] wlp3s0: send auth to ipv6
[27562.661623] wlp3s0: authenticated
[27562.665039] wlp3s0: associate with ipv6 (try 1/3)
[27562.680877] wlp3s0: RX AssocResp from ipv6 (capab=0x411 status=0 aid=5)
[27562.683428] wlp3s0: associated
[27562.711448] wlp3s0: Limiting TX power to 27 (30 - 3) dBm as advertised by ipv6

and dhcp doing its normal thing

Apr 20 19:49:19  dhcpcd[710]: wlp3s0: IAID 43:71:6b:7c
Apr 20 19:49:19  dhcpcd[710]: wlp3s0: adding address ipv6
Apr 20 19:49:19  dhcpcd[710]: wlp3s0: soliciting a DHCP lease
Apr 20 19:49:20  dhcpcd[710]: wlp3s0: soliciting an IPv6 router
Apr 20 19:49:20  dhcpcd[710]: wlp3s0: offered 192.168.178.61 from 192.168.178.1
Apr 20 19:49:20  dhcpcd[710]: wlp3s0: probing address 192.168.178.61/24
Apr 20 19:49:20  dhcpcd[710]: wlp3s0: Router Advertisement from ipv6
Apr 20 19:49:20  dhcpcd[710]: wlp3s0: adding address ipv6
Apr 20 19:49:20  dhcpcd[710]: wlp3s0: adding route to ipv6
Apr 20 19:49:20  dhcpcd[710]: wlp3s0: requesting DHCPv6 information
Apr 20 19:49:20  dhcpcd[710]: wlp3s0: adding default route via ipv6
Apr 20 19:49:26  dhcpcd[710]: wlp3s0: leased 192.168.178.61 for 864000 seconds
Apr 20 19:49:26  dhcpcd[710]: wlp3s0: adding route to 192.168.178.0/24
Apr 20 19:49:26  dhcpcd[710]: wlp3s0: adding default route via 192.168.178.1

I use wpa_supplicant to authenticate. How can I troubleshoot this? Is there a way to see some kind of logs from the network interface?