Thank you, NoTengoBattery, appreciate your support! To follow up on this, since few days ago, i have reflashed the firmware few more times, have not seen any backtraces since. Do you think it was a fluke or i should still look at getting a new router?
Lastly, i have noticed on this build (i came from v1.00.oc) when i play music over AirPlay to a Sonos speaker, the sound at times becomes choppy. Restarting the router fixes the issue for a while, then issue comes back. For full transparency, my setup is bit wonky, because the internet uplink comes in as a client from another Wifi provider on 2.4Ghz radio. Full setup is 2.4Ghz radio is a client (STA) to a wifi uplink, 5Ghz is the internal network. Additionally, off of the 2.4Ghz radio, i have a AP network that the Sonos speaker sits on (it doesn't support 5Ghz band).
This used to work fine on older firmware without issues, i am not sure if its router dying as you alluded to, or driver issues. I don't see anything particularly odd form error standpoint in logread, but in dmsg, i am noticing much more chatter from ath10k_ahb driver. Any suggestions of what else i can look at?
root@z:~# dmesg | grep ath10k
[ 20.019059] ath10k_ahb a000000.wifi: qca4019 hw1.0 target 0x01000000 chip_id 0x003b00ff sub 0000:0000
[ 20.019116] ath10k_ahb a000000.wifi: kconfig debug 0 debugfs 1 tracing 0 dfs 1 testmode 0
[ 20.031599] ath10k_ahb a000000.wifi: firmware ver 10.4b-ct-4019-fH-013-d81f62d97 api 5 features mfp,peer-flow-ctrl,txstatus-noack,wmi-10.x-CT,ratemask-CT,regdump-CT,txrate-CT,flush-all-CT,pingpong-CT,ch-regs-CT,nop-CT,htt-mgt-CT,set-special-CT,tx-rc-CT,cust-stats-CT,txrate2-CT,beacon-cb-CT,wmi-block-ack-CT,wmi-bcn-rc-CT crc32 a1c68947
[ 20.097174] ath10k_ahb a000000.wifi: board_file api 2 bmi_id 0:16 crc32 178da79b
[ 21.403711] ath10k_ahb a000000.wifi: unsupported HTC service id: 1536
[ 21.404530] ath10k_ahb a000000.wifi: 10.4 wmi init: vdevs: 16 peers: 48 tid: 96
[ 21.409240] ath10k_ahb a000000.wifi: msdu-desc: 2500 skid: 32
[ 21.457595] ath10k_ahb a000000.wifi: wmi print 'P 48/48 V 16 K 144 PH 176 T 186 msdu-desc: 2500 sw-crypt: 0 ct-sta: 0'
[ 21.458592] ath10k_ahb a000000.wifi: wmi print 'free: 53220 iram: 13688 sram: 35752'
[ 21.615210] ath10k_ahb a000000.wifi: htt-ver 2.2 wmi-op 6 htt-op 4 cal pre-cal-file max-sta 32 raw 0 hwcrypto 1
[ 22.292612] ath10k_ahb a800000.wifi: qca4019 hw1.0 target 0x01000000 chip_id 0x003b00ff sub 0000:0000
[ 22.292656] ath10k_ahb a800000.wifi: kconfig debug 0 debugfs 1 tracing 0 dfs 1 testmode 0
[ 22.303652] ath10k_ahb a800000.wifi: firmware ver 10.4b-ct-4019-fH-013-d81f62d97 api 5 features mfp,peer-flow-ctrl,txstatus-noack,wmi-10.x-CT,ratemask-CT,regdump-CT,txrate-CT,flush-all-CT,pingpong-CT,ch-regs-CT,nop-CT,htt-mgt-CT,set-special-CT,tx-rc-CT,cust-stats-CT,txrate2-CT,beacon-cb-CT,wmi-block-ack-CT,wmi-bcn-rc-CT crc32 a1c68947
[ 22.357520] ath10k_ahb a800000.wifi: board_file api 2 bmi_id 0:17 crc32 178da79b
[ 23.664119] ath10k_ahb a800000.wifi: unsupported HTC service id: 1536
[ 23.665000] ath10k_ahb a800000.wifi: 10.4 wmi init: vdevs: 16 peers: 48 tid: 96
[ 23.669617] ath10k_ahb a800000.wifi: msdu-desc: 2500 skid: 32
[ 23.717657] ath10k_ahb a800000.wifi: wmi print 'P 48/48 V 16 K 144 PH 176 T 186 msdu-desc: 2500 sw-crypt: 0 ct-sta: 0'
[ 23.718518] ath10k_ahb a800000.wifi: wmi print 'free: 53220 iram: 13688 sram: 35752'
[ 23.854438] ath10k_ahb a800000.wifi: htt-ver 2.2 wmi-op 6 htt-op 4 cal pre-cal-file max-sta 32 raw 0 hwcrypto 1
[ 31.364064] ath10k_ahb a000000.wifi: unsupported HTC service id: 1536
[ 31.364204] ath10k_ahb a000000.wifi: 10.4 wmi init: vdevs: 16 peers: 48 tid: 96
[ 31.369636] ath10k_ahb a000000.wifi: msdu-desc: 2500 skid: 32
[ 31.417593] ath10k_ahb a000000.wifi: wmi print 'P 48/48 V 16 K 144 PH 176 T 186 msdu-desc: 2500 sw-crypt: 0 ct-sta: 0'
[ 31.418702] ath10k_ahb a000000.wifi: wmi print 'free: 53220 iram: 13688 sram: 35752'
[ 31.806618] ath10k_ahb a000000.wifi: Firmware lacks feature flag indicating a retry limit of > 2 is OK, requested limit: 4
[ 32.002857] ath10k_ahb a000000.wifi: NOTE: Firmware DBGLOG output disabled in debug_mask: 0x10000000
[ 33.314630] ath10k_ahb a800000.wifi: unsupported HTC service id: 1536
[ 33.314858] ath10k_ahb a800000.wifi: 10.4 wmi init: vdevs: 16 peers: 48 tid: 96
[ 33.320218] ath10k_ahb a800000.wifi: msdu-desc: 2500 skid: 32
[ 33.368125] ath10k_ahb a800000.wifi: wmi print 'P 48/48 V 16 K 144 PH 176 T 186 msdu-desc: 2500 sw-crypt: 0 ct-sta: 0'
[ 33.369094] ath10k_ahb a800000.wifi: wmi print 'free: 53220 iram: 13688 sram: 35752'
[ 33.684918] ath10k_ahb a800000.wifi: Firmware lacks feature flag indicating a retry limit of > 2 is OK, requested limit: 4
[ 43.970431] ath10k_ahb a000000.wifi: Invalid peer id 0 or peer stats buffer, peer: 41d718ef sta: 00000000
[ 460.306131] ath10k_ahb a800000.wifi: Invalid VHT mcs 15 peer stats
[25838.577744] ath10k_ahb a800000.wifi: htt tx: fixing invalid VHT TX rate code 0xff
[37492.657910] ath10k_ahb a000000.wifi: wmi: fixing invalid VHT TX rate code 0xff
root@z:~#