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I am using a QCN9074 chipset with the `ath11k` driver and would like to use the background scan functionality in `wpa_supplicant`. During my testing, I noticed that hidden access points operating on DFS channels are not discovered. Even when I manually trigger a scan, I can only see the hidden AP to which the client is currently connected. Other hidden APs remain absent from the scan results. Based on my research, DFS channels cannot be scanned passively, so I used a sniffer to verify that the "directed" probe requests with given SSID were actually being transmitted. I also confirmed that the hidden AP responded with a probe response. However, despite receiving the probe response, the AP never appears in the `scan_results` list reported by `wpa_supplicant`. To further investigate, I modified the `ath11k` driver in the scan request handling path `ath11k_wmi_start_scan_init()` as follows: - arg->repeat_probe_time = 0; + arg->repeat_probe_time = 50; + arg->n_probes = 2; After applying this changes, I was able to verify that two directed probe requests were transmitted with a spacing of 50 ms between them. My main question is how this use case is intended to work. At first glance, this does not appear to be a driver bug. However, with the default configuration (repeat_probe_time = 0), the scan results do not seem to be updated as expected. Is this modification to the `ath11k` driver considered valid, or is there a preferred way to handle this scenario? Are there any `wpa_supplicant` parameters that should be adjusted instead? I would like to fully understand the intended behavior and the interaction between `ath11k`, firmware, and `wpa_supplicant` in this case. Any insights, recommendations, or background information would be greatly appreciated. Thank you for your time and support. Best regards Alexander Wilhelm