some weird error on show log buffer

[zlinuxboy]

I occasionally `show log buffer` and saw some error:

2021-07-23 11:20:38 info    kernel: [wifi]: wl1: wlc_txbf_init_exp failed to set shm idx
2021-07-23 11:20:38 info    kernel: [wifi]: 1 wlc_txbf_set_shm_idx: fail to find a free user index
2021-07-23 11:20:38 info    kernel: [wifi]: wl1: wlc_txbf_init_exp failed to set shm idx
2021-07-23 11:20:38 info    kernel: [wifi]: 1 wlc_txbf_set_shm_idx: fail to find a free user index
2021-07-23 11:20:38 info    kernel: [wifi]: wl1 wlc_txbf_set_shm_idx: scb aleady has user index 255
2021-07-23 11:20:38 info    kernel: [wifi]: wl_add_timer: Already set. Name: wnm_bss_idle_timer, per 1
2021-07-23 11:20:38 info    kernel: [wifi]: wl1: 4 rx hlfifo overflows!
2021-07-23 11:20:38 info    kernel: [wifi]: wl1: wlc_recvdata_ordered: frame from cc:f9:e4:bb:37:f8 decrypt failed: -48
2021-07-23 11:20:38 info    kernel: [wifi]: wl1: wlc_recvdata_ordered: frame from cc:b0:da:fe:c9:6f decrypt failed: -48
2021-07-23 11:20:38 info    kernel: [wifi]: wl1: wlc_recvdata_ordered: frame from 84:ef:18:6e:9b:50 decrypt failed: -48
2021-07-23 11:20:38 info    kernel: [wifi]: wl1: wlc_recvdata_ordered: frame from 20:16:b9:65:c7:f0 decrypt failed: -48
2021-07-23 11:20:38 info    kernel: [wifi]: wl1: wlc_recvdata_ordered: frame from 9c:b6:d0:f7:0c:d5 decrypt failed: -48
2021-07-23 11:20:38 info    kernel: [wifi]: wl1: wlc_recvdata_ordered: frame from cc:f9:e4:bb:37:f8 decrypt failed: -48
2021-07-23 11:20:38 info    kernel: [wifi]: wl1: wlc_recvdata_ordered: frame from 20:16:b9:65:c7:f0 decrypt failed: -48
2021-07-23 11:20:38 info    kernel: [wifi]: wl1: wlc_recvdata_ordered: frame from e4:02:9b:41:96:9b decrypt failed: -48
2021-07-23 11:20:38 info    kernel: [wifi]: wl1: wlc_recvdata_ordered: frame from 98:54:1b:d9:55:44 decrypt failed: -48
2021-07-23 11:20:38 info    kernel: [wifi]: wl1: wlc_recvdata_ordered: frame from 44:03:2c:7c:04:66 decrypt failed: -48
2021-07-23 11:20:38 info    kernel: [wifi]: wl1: wlc_recvdata_ordered: frame from 44:03:2c:7c:04:66 decrypt failed: -48
2021-07-23 11:20:35 info    last message repeated 2 times
2021-07-23 11:20:35 info    ah_auth: aaa: pmksa_cache_auth_add: own_addr 9c5d:1249:2be4, sta 5c66:6c60:ca55, 1, username guoyingying
2021-07-23 11:20:35 info    kernel: [wifi]: wl1: wlc_ampdu_resp_timeout: cleaning up resp tid 0 waiting forseq 0xd42 for 200 ms
2021-07-23 11:20:35 info    kernel: [wifi]: wl1: link up (wifi1.1)
2021-07-23 11:20:35 info    kernel: [wifi]: wl1: wlc_watchdog HAMMERING due to too many phy tx error in 1s
2021-07-23 11:20:35 info    kernel: [wifi]: wl1 wlc_txbf_set_shm_idx: scb aleady has user index 255
2021-07-23 11:20:35 info    kernel: [wifi]: wl1 wlc_txbf_set_shm_idx: scb aleady has user index 255
2021-07-23 11:20:35 info    kernel: [wifi]: wl1: wlc_txbf_init_exp failed to set shm idx
2021-07-23 11:20:35 info    kernel: [wifi]: 1 wlc_txbf_set_shm_idx: fail to find a free user index
2021-07-23 11:20:35 info    kernel: [wifi]: wl1: wlc_txbf_init_exp failed to set shm idx
2021-07-23 11:20:35 info    kernel: [wifi]: 1 wlc_txbf_set_shm_idx: fail to find a free user index
2021-07-23 11:20:35 info    kernel: [wifi]: wl1: wlc_txbf_init_exp failed to set shm idx
2021-07-23 11:20:35 info    kernel: [wifi]: 1 wlc_txbf_set_shm_idx: fail to find a free user index
2021-07-23 11:20:35 info    kernel: [wifi]: wl1: wlc_txbf_init_exp failed to set shm idx
2021-07-23 11:20:35 info    kernel: [wifi]: 1 wlc_txbf_set_shm_idx: fail to find a free user index
2021-07-23 11:20:35 info    kernel: [wifi]: wl1: wlc_txbf_init_exp failed to set shm idx
2021-07-23 11:20:35 info    kernel: [wifi]: 1 wlc_txbf_set_shm_idx: fail to find a free user index

and idea what is wrong?

[SamPirok · Accepted solution]

Thank you for letting me know. In that case, I would suggest checking the CPU on the AP to make sure it looks normal. This guide reviews how to check and troubleshoot CPU on IQE devices. 

If that looks normal, I’d check the levels of radio frequency (RF) interference on the AP. This guide reviews how to identify RF interference and how to troubleshoot for the different causes ... 

Other than that, if you have MU-MIMO enabled, try disabling it and monitoring the AP for a couple hours if possible to see if that clears up the logs. Also, if you’re using QoS in your user profiles, I’d suggest switching to a default QoS object and/or no QoS to see if that clears up those messages. 

If none of that helps, I’d recommend opening a support case and letting them know what you’ve tried so far. 

[zlinuxboy]

Yes, ap230 is running 10.3.3.

[SamPirok]

Looking at cases with similar errors, seems like it’s linked to radio frequency interference and high CPU, I’d recommend checking those first. Some cases also saw improvement after disabling MU-MIMO and QoS.

That said, all the cases I can find with these errors are for much older firmware versions, are you seeing these messages while using the latest firmware available for your model?