I was posting on KONG's thread but I assume this works here too. For the past month, without any changes to my network environment, I've started expecting dropouts for a few 2.4Ghz clients every other minute.
I've tried troubleshooting by reverting all the way down to v19, coming back to v23 with CT and non-CT drivers, restoring factory settings, connecting each client and checking stability, and unfortunately there's no conclusion at all.
The best I could get was after flashing the latest 23.05 build and using channel 6 I had 5 hours of stable connections, for everything to start deauthing clients again.
A few log entries below from the past days:
Fri Jun 7 17:54:41 2024 daemon.info hostapd: phy1-ap0: STA ec:fa:bc:7c:72:8e WPA: pairwise key handshake completed (RSN)
Fri Jun 7 17:54:41 2024 daemon.notice hostapd: phy1-ap0: EAPOL-4WAY-HS-COMPLETED ec:fa:bc:7c:72:8e
Fri Jun 7 17:54:42 2024 daemon.info dnsmasq-dhcp[11052]: DHCPDISCOVER(br-lan) ec:fa:bc:7c:72:8e
Fri Jun 7 17:54:42 2024 daemon.info dnsmasq-dhcp[11052]: DHCPOFFER(br-lan) 192.168.1.210 ec:fa:bc:7c:72:8e
Fri Jun 7 17:54:46 2024 daemon.notice hostapd: phy1-ap0: AP-STA-DISCONNECTED ec:fa:bc:7c:72:8e
Fri Jun 7 17:54:46 2024 daemon.notice hostapd: phy1-ap0: AP-STA-DISCONNECTED c8:2b:96:04:bd:1a
Fri Jun 7 17:54:47 2024 daemon.notice hostapd: phy1-ap0: STA ec:fa:bc:7c:72:8e IEEE 802.11: did not acknowledge authentication response
Fri Jun 7 17:54:47 2024 daemon.info hostapd: phy1-ap0: STA c8:2b:96:04:bd:1a IEEE 802.11: authenticated
Fri Jun 7 17:54:47 2024 daemon.info hostapd: phy1-ap0: STA c8:2b:96:04:bd:1a IEEE 802.11: associated (aid 7)
Fri Jun 7 17:54:56 2024 daemon.info hostapd: phy1-ap0: STA c8:2b:96:04:bd:1a IEEE 802.11: deauthenticated due to local deauth request
Fri Jun 7 17:55:12 2024 daemon.info hostapd: phy1-ap0: STA ec:fa:bc:7c:72:8e IEEE 802.11: authenticated
Fri Jun 7 17:55:12 2024 daemon.info hostapd: phy1-ap0: STA ec:fa:bc:7c:72:8e IEEE 802.11: associated (aid 4)
Fri Jun 7 17:55:21 2024 daemon.info hostapd: phy1-ap0: STA ec:fa:bc:7c:72:8e IEEE 802.11: deauthenticated due to local deauth request
Fri Jun 7 17:55:23 2024 daemon.info hostapd: phy1-ap0: STA c8:2b:96:04:bd:1a IEEE 802.11: authenticated
[ 66.024137] br-lan: port 3(phy0-ap0) entered forwarding state
[ 676.957838] ath10k_pci 0001:01:00.0: failed to flush transmit queue (skip 0 ar-state 1): 0
[ 797.598971] ath10k_pci 0001:01:00.0: failed to flush transmit queue (skip 0 ar-state 1): 0
[ 1140.077592] ath10k_pci 0001:01:00.0: failed to flush transmit queue (skip 0 ar-state 1): 0
[ 1311.187312] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[ 1311.187349] rcu: 0-...!: (0 ticks this GP) idle=478/0/0x0 softirq=33440/33440 fqs=0 (false positive?)
[ 1311.192042] (detected by 1, t=2102 jiffies, g=53989, q=477)
[ 1311.201413] Sending NMI from CPU 1 to CPUs 0:
[ 1311.207319] NMI backtrace for cpu 0
[ 1311.207325] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.15.158 #0
[ 1311.207331] Hardware name: Generic DT based system
[ 1311.207333] PC is at arch_cpu_idle+0x38/0x3c
[ 1311.207347] LR is at arch_cpu_idle+0x34/0x3c
[ 1311.207353] pc : [<c03071dc>] lr : [<c03071d8>] psr: 60000013
[ 1311.207357] sp : c0d01f60 ip : de80400c fp : c0d04f98
[ 1311.207359] r10: c0d04f08 r9 : ffffe000 r8 : 00000000
[ 1311.207362] r7 : 00000000 r6 : c0d00000 r5 : c0d04f68 r4 : 00000000
[ 1311.207365] r3 : c0316a00 r2 : 00000001 r1 : 00000000 r0 : 00bf6530
[ 1311.207368] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
[ 1311.207373] Control: 10c5787d Table: 45e8c06a DAC: 00000051
[ 1311.207376] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.15.158 #0
[ 1311.207380] Hardware name: Generic DT based system
[ 1311.207387] [<c030ddd8>] (unwind_backtrace) from [<c0309d28>] (show_stack+0x10/0x14)
[ 1311.207400] [<c0309d28>] (show_stack) from [<c05eb0a4>] (dump_stack_lvl+0x40/0x4c)
[ 1311.207415] [<c05eb0a4>] (dump_stack_lvl) from [<c05f295c>] (nmi_cpu_backtrace+0xc4/0x110)
[ 1311.207427] [<c05f295c>] (nmi_cpu_backtrace) from [<c030c698>] (do_handle_IPI+0x5c/0x12c)
[ 1311.207437] [<c030c698>] (do_handle_IPI) from [<c030c780>] (ipi_handler+0x18/0x20)
[ 1311.207445] [<c030c780>] (ipi_handler) from [<c0370df0>] (handle_percpu_devid_irq+0x78/0x13c)
[ 1311.207457] [<c0370df0>] (handle_percpu_devid_irq) from [<c036afe4>] (handle_domain_irq+0x5c/0x78)
[ 1311.207471] [<c036afe4>] (handle_domain_irq) from [<c03012e4>] (gic_handle_irq+0x7c/0x90)
[ 1311.207482] [<c03012e4>] (gic_handle_irq) from [<c0300b7c>] (__irq_svc+0x5c/0x78)
[ 1311.207491] Exception stack(0xc0d01f10 to 0xc0d01f58)
[ 1311.207496] 1f00: 00bf6530 00000000 00000001 c0316a00
[ 1311.207500] 1f20: 00000000 c0d04f68 c0d00000 00000000 00000000 ffffe000 c0d04f08 c0d04f98
[ 1311.207504] 1f40: de80400c c0d01f60 c03071d8 c03071dc 60000013 ffffffff
[ 1311.207507] [<c0300b7c>] (__irq_svc) from [<c03071dc>] (arch_cpu_idle+0x38/0x3c)
[ 1311.207517] [<c03071dc>] (arch_cpu_idle) from [<c034f3e0>] (do_idle+0x23c/0x29c)
[ 1311.207534] [<c034f3e0>] (do_idle) from [<c034f744>] (cpu_startup_entry+0x18/0x1c)
[ 1311.207545] [<c034f744>] (cpu_startup_entry) from [<c0c011a0>] (start_kernel+0x6b4/0x6c4)
[ 1311.208316] rcu: rcu_sched kthread timer wakeup didn't happen for 2103 jiffies! g53989 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
[ 1311.418521] rcu: Possible timer handling issue on cpu=0 timer-softirq=23471
Jun 8 16:05:03 OpenWrt hostapd: wlan1: STA 8e:85:80:0a:e4:9a IEEE 802.11: authenticated
Jun 8 16:05:03 OpenWrt hostapd: wlan1: STA 8e:85:80:0a:e4:9a IEEE 802.11: associated (aid 3)
Jun 8 16:05:12 OpenWrt hostapd: wlan1: STA 8e:85:80:0a:e4:9a IEEE 802.11: deauthenticated due to local deauth request
Jun 8 16:05:19 OpenWrt hostapd: wlan1: STA b8:2d:28:1b:ef:1c IEEE 802.11: authenticated
Jun 8 16:05:19 OpenWrt hostapd: wlan1: STA 78:0f:77:fd:83:66 IEEE 802.11: authenticated
Jun 8 16:05:35 OpenWrt hostapd: wlan1: STA b8:2d:28:1b:ef:1c IEEE 802.11: did not acknowledge authentication response
Jun 8 16:05:35 OpenWrt hostapd: wlan1: STA 78:0f:77:fd:96:4f IEEE 802.11: authenticated
Jun 8 16:05:38 OpenWrt hostapd: wlan1: STA 78:0f:77:fd:96:4f IEEE 802.11: authenticated
Jun 8 16:05:56 OpenWrt igmpproxy[4565]: MRT_DEL_MFC; Errno(2): No such file or directory
Jun 8 16:06:00 OpenWrt hostapd: wlan1: STA 78:0f:77:fd:96:4f IEEE 802.11: authenticated
Jun 8 16:06:00 OpenWrt hostapd: wlan1: STA 78:0f:77:fd:96:4f IEEE 802.11: associated (aid 3)
Jun 8 16:06:03 OpenWrt hostapd: wlan1: STA 78:0f:77:fd:83:66 IEEE 802.11: authenticated
Jun 8 16:06:03 OpenWrt hostapd: wlan1: STA 78:0f:77:fd:83:66 IEEE 802.11: associated (aid 4)
Jun 8 16:06:05 OpenWrt hostapd: wlan1: AP-STA-CONNECTED 78:0f:77:fd:83:66
Jun 8 16:06:05 OpenWrt hostapd: wlan1: STA 78:0f:77:fd:83:66 RADIUS: starting accounting session 98F5F94467AD77BF
Jun 8 16:06:05 OpenWrt hostapd: wlan1: STA 78:0f:77:fd:83:66 WPA: pairwise key handshake completed (RSN)
Jun 8 16:06:05 OpenWrt hostapd: wlan1: EAPOL-4WAY-HS-COMPLETED 78:0f:77:fd:83:66
Jun 8 16:06:26 OpenWrt hostapd: wlan1: AP-STA-DISCONNECTED b4:8a:0a:c5:3d:30
Jun 8 16:06:26 OpenWrt hostapd: wlan1: STA b4:8a:0a:c5:3d:30 IEEE 802.11: authenticated
Jun 8 16:06:31 OpenWrt hostapd: wlan1: AP-STA-DISCONNECTED 78:0f:77:fd:83:66
Jun 8 16:06:33 OpenWrt hostapd: wlan1: STA 78:0f:77:fd:83:66 IEEE 802.11: did not acknowledge authentication response
Jun 8 16:06:38 OpenWrt igmpproxy[4565]: MRT_DEL_MFC; Errno(2): No such file or directory
Jun 8 16:06:42 OpenWrt hostapd: wlan1: STA 8e:85:80:0a:e4:9a IEEE 802.11: authenticated
Jun 8 16:06:42 OpenWrt hostapd: wlan1: STA 8e:85:80:0a:e4:9a IEEE 802.11: associated (aid 1)
Jun 8 16:06:43 OpenWrt hostapd: wlan1: STA c8:2b:96:04:bd:1a IEEE 802.11: did not acknowledge authentication response
Sun Jun 9 16:06:11 2024 kern.info kernel: [ 711.998838] ath10k_pci 0001:01:00.0: mac flush vdev 0 drop 0 queues 0x1 ar->paused: 0x0 arvif->paused: 0x0
Sun Jun 9 16:06:12 2024 kern.info kernel: [ 712.058720] ath10k_pci 0001:01:00.0: mac flush vdev 0 drop 0 queues 0x1 ar->paused: 0x0 arvif->paused: 0x0
Sun Jun 9 16:06:12 2024 kern.info kernel: [ 712.208711] ath10k_pci 0001:01:00.0: mac flush vdev 0 drop 0 queues 0x1 ar->paused: 0x0 arvif->paused: 0x0
Sun Jun 9 16:06:12 2024 kern.info kernel: [ 712.348699] ath10k_pci 0001:01:00.0: mac flush vdev 0 drop 0 queues 0x1 ar->paused: 0x0 arvif->paused: 0x0
Sun Jun 9 16:06:12 2024 kern.info kernel: [ 712.478700] ath10k_pci 0001:01:00.0: mac flush vdev 0 drop 0 queues 0x1 ar->paused: 0x0 arvif->paused: 0x0
Sun Jun 9 16:06:12 2024 kern.info kernel: [ 712.608738] ath10k_pci 0001:01:00.0: mac flush vdev 0 drop 0 queues 0x1 ar->paused: 0x0 arvif->paused: 0x0
Sun Jun 9 16:06:12 2024 kern.info kernel: [ 712.617682] ath10k_pci 0001:01:00.0: mac flush null vif, drop 0 queues 0xffff
I had an Asus RT-AC87U around. Set it with the same SSID, channels, clients and wifi configs. Everything has been stable for the past 24h, no disconnections/deauths. This makes me believe something is wrong with my R7800 firmware/configs.
I'd appreciate some guidance into fixing this issue. 5Ghz works flawlessly.