Now I got some kernel log entries on both AP's.
First AP (3d):
[34777.160084] ath10k_pci 0000:01:00.0: No VIF found for vdev 1
[34777.160138] ath10k_pci 0000:01:00.0: received addba event for invalid vdev_id: 1
[34777.166638] ath10k_pci 0000:01:00.0: No VIF found for vdev 1
[34777.172344] ath10k_pci 0000:01:00.0: received addba event for invalid vdev_id: 1
[34777.177864] ath10k_pci 0000:01:00.0: No VIF found for vdev 1
[34777.185340] ath10k_pci 0000:01:00.0: received addba event for invalid vdev_id: 1
[34777.191002] ath10k_pci 0000:01:00.0: No VIF found for vdev 1
[34777.198248] ath10k_pci 0000:01:00.0: received addba event for invalid vdev_id: 1
[34777.204530] ath10k_pci 0000:01:00.0: No VIF found for vdev 1
[34777.211339] ath10k_pci 0000:01:00.0: no vif for vdev_id 1 found
[34777.227308] ath10k_pci 0000:01:00.0: peer-unmap-event: unknown peer id 1
[34777.227360] ath10k_pci 0000:01:00.0: peer-unmap-event: unknown peer id 1
blabla
[34777.510143] ath10k_pci 0000:01:00.0: peer-unmap-event: unknown peer id 0
[34777.510363] ath10k_pci 0000:01:00.0: peer-unmap-event: unknown peer id 0
[34778.884407] ath10k_pci 0000:01:00.0: 10.4 wmi init: vdevs: 16 peers: 48 tid: 96
[34778.884438] ath10k_pci 0000:01:00.0: msdu-desc: 2500 skid: 32
[34778.960376] ath10k_pci 0000:01:00.0: wmi print 'P 48/48 V 16 K 144 PH 176 T 186 msdu-desc: 2500 sw-crypt: 0 ct-sta: 0'
[34778.961148] ath10k_pci 0000:01:00.0: wmi print 'free: 34244 iram: 33204 sram: 6508'
[34779.296113] ath10k_pci 0000:01:00.0: Firmware lacks feature flag indicating a retry limit of > 2 is OK, requested limit: 4
Second AP (wifi still working, 3d):
[149914.389595] ath10k_pci 0000:01:00.0: No VIF found for vdev 1
[149914.389643] ath10k_pci 0000:01:00.0: no vif for vdev_id 1 found
[149914.433124] ath10k_pci 0000:01:00.0: No VIF found for vdev 1
[149914.433152] ath10k_pci 0000:01:00.0: received addba event for invalid vdev_id: 1
[149914.439142] ath10k_pci 0000:01:00.0: No VIF found for vdev 1
[149914.445403] ath10k_pci 0000:01:00.0: received addba event for invalid vdev_id: 1
[149914.451124] ath10k_pci 0000:01:00.0: No VIF found for vdev 1
[149914.458504] ath10k_pci 0000:01:00.0: received addba event for invalid vdev_id: 1
[149914.465809] ath10k_pci 0000:01:00.0: No VIF found for vdev 1
[149914.471776] ath10k_pci 0000:01:00.0: received addba event for invalid vdev_id: 1
[149914.478757] ath10k_pci 0000:01:00.0: No VIF found for vdev 1
[149914.484965] ath10k_pci 0000:01:00.0: received addba event for invalid vdev_id: 1
[149914.490702] ath10k_pci 0000:01:00.0: No VIF found for vdev 1
[149914.498100] ath10k_pci 0000:01:00.0: received addba event for invalid vdev_id: 1
[149914.503893] ath10k_pci 0000:01:00.0: No VIF found for vdev 1
[149914.511348] ath10k_pci 0000:01:00.0: received addba event for invalid vdev_id: 1
[149914.517169] ath10k_pci 0000:01:00.0: No VIF found for vdev 1
[149914.524543] ath10k_pci 0000:01:00.0: no vif for vdev_id 1 found
[149914.533025] ath10k_pci 0000:01:00.0: peer-unmap-event: unknown peer id 1
[149914.536344] ath10k_pci 0000:01:00.0: peer-unmap-event: unknown peer id 1
blabla
[149914.843318] ath10k_pci 0000:01:00.0: peer-unmap-event: unknown peer id 0
[149914.843393] ath10k_pci 0000:01:00.0: peer-unmap-event: unknown peer id 0
[149914.849104] ath10k_pci 0000:01:00.0: peer-unmap-event: unknown peer id 0
[149914.864205] ath10k_pci 0000:01:00.0: firmware crashed! (guid blabla)
[149914.864251] ath10k_pci 0000:01:00.0: qca99x0 hw2.0 target 0x01000000 chip_id 0x003b01ff sub 168c:0002
[149914.872161] ath10k_pci 0000:01:00.0: kconfig debug 0 debugfs 1 tracing 0 dfs 1 testmode 0
[149914.883958] ath10k_pci 0000:01:00.0: firmware ver 10.4b-ct-9980-fH-012-17ba9833 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 fcda7b5d
[149914.897494] ath10k_pci 0000:01:00.0: board_file api 2 bmi_id 1:1 crc32 08fa09f2
[149914.919536] ath10k_pci 0000:01:00.0: htt-ver 2.2 wmi-op 6 htt-op 4 cal pre-cal-file max-sta 32 raw 0 hwcrypto 1
[149914.938936] ath10k_pci 0000:01:00.0: failed to get memcpy hi address for firmware address 4: -16
[149914.938968] ath10k_pci 0000:01:00.0: failed to read firmware dump area: -16
[149914.946865] ath10k_pci 0000:01:00.0: in crash-regs-harder
[149915.729788] ath10k_pci 0000:01:00.0: in crash-regs-harder, firmware did not provide indicator: 0xdeadbeef
[149915.729822] ath10k_pci 0000:01:00.0: Copy Engine register dump:
[149915.738401] ath10k_pci 0000:01:00.0: [00]: 0x0004a000 3735928559 3735928559 3735928559 3735928559
[149915.744586] ath10k_pci 0000:01:00.0: [01]: 0x0004a400 3735928559 3735928559 3735928559 3735928559
[149915.753332] ath10k_pci 0000:01:00.0: [02]: 0x0004a800 3735928559 3735928559 3735928559 3735928559
[149915.762266] ath10k_pci 0000:01:00.0: [03]: 0x0004ac00 3735928559 3735928559 3735928559 3735928559
[149915.771232] ath10k_pci 0000:01:00.0: [04]: 0x0004b000 3735928559 3735928559 3735928559 3735928559
[149915.780091] ath10k_pci 0000:01:00.0: [05]: 0x0004b400 3735928559 3735928559 3735928559 3735928559
[149915.789101] ath10k_pci 0000:01:00.0: [06]: 0x0004b800 3735928559 3735928559 3735928559 3735928559
[149915.798036] ath10k_pci 0000:01:00.0: [07]: 0x0004bc00 3735928559 3735928559 3735928559 3735928559
[149915.806971] ath10k_pci 0000:01:00.0: [08]: 0x0004c000 3735928559 3735928559 3735928559 3735928559
[149915.815938] ath10k_pci 0000:01:00.0: [09]: 0x0004c400 3735928559 3735928559 3735928559 3735928559
[149915.824871] ath10k_pci 0000:01:00.0: [10]: 0x0004c800 3735928559 3735928559 3735928559 3735928559
[149915.833806] ath10k_pci 0000:01:00.0: [11]: 0x0004cc00 3735928559 3735928559 3735928559 3735928559
[149915.842744] ath10k_pci 0000:01:00.0: failed to get memcpy hi address for firmware address 8: -28
[149915.851671] ath10k_pci 0000:01:00.0: failed to dump debug log area: -28
[149915.860610] ath10k_pci 0000:01:00.0: failed to get memcpy hi address for firmware address 72: -28
[149915.867329] ath10k_pci 0000:01:00.0: failed to get memcpy hi address for firmware address 72: -28
[149915.876167] ath10k_pci 0000:01:00.0: failed to get memcpy hi address for firmware address 76: -28
[149915.885102] ath10k_pci 0000:01:00.0: failed to get memcpy hi address for firmware address 76: -28
[149915.894040] ath10k_pci 0000:01:00.0: failed to read firmware RAM BSS memory from 4275264 (23656 B): -28
[149915.903003] ath10k_pci 0000:01:00.0: failed to read firmware ROM BSS memory from 4197376 (12008 B): -28
[149915.912986] ath10k_pci 0001:01:00.0: SWBA overrun on vdev 1, skipped old beacon
[149915.922110] ath10k_pci 0001:01:00.0: SWBA overrun on vdev 0, skipped old beacon
[149915.929401] ath10k_pci 0001:01:00.0: SWBA overrun on vdev 1, skipped old beacon
[149915.936841] ath10k_pci 0001:01:00.0: SWBA overrun on vdev 0, skipped old beacon
[149915.944213] ath10k_pci 0001:01:00.0: SWBA overrun on vdev 1, skipped old beacon
[149915.951588] ath10k_pci 0001:01:00.0: SWBA overrun on vdev 0, skipped old beacon
[149915.958949] ath10k_pci 0001:01:00.0: SWBA overrun on vdev 1, skipped old beacon
[149915.966398] ath10k_pci 0001:01:00.0: SWBA overrun on vdev 0, skipped old beacon
[149915.970208] ath10k_pci 0000:01:00.0: cannot restart a device that hasn't been started
[149917.267171] ath10k_pci 0000:01:00.0: 10.4 wmi init: vdevs: 16 peers: 48 tid: 96
[149917.267202] ath10k_pci 0000:01:00.0: msdu-desc: 2500 skid: 32
[149917.343104] ath10k_pci 0000:01:00.0: wmi print 'P 48/48 V 16 K 144 PH 176 T 186 msdu-desc: 2500 sw-crypt: 0 ct-sta: 0'
[149917.343861] ath10k_pci 0000:01:00.0: wmi print 'free: 34244 iram: 33204 sram: 6508'
[149917.678495] ath10k_pci 0000:01:00.0: Firmware lacks feature flag indicating a retry limit of > 2 is OK, requested limit: 4
Second one looks somehow more risky. Any idea what this means, given that those AP's have 512MB RAM each and I didn't see that without irqbalance (maybe coincidence) after 6 d uptime?
Should I use non-DFS channels only ? acc. to this Netgear R7800 wifi internet connectivity drops
cheers blinton