I'm setting up a access point on a linux router. I am unable to start hostapd. I get the error DFS start_dfs_cac() failed, -1 I'm using a Compex WLE600VX Qualcom QCA9882 /usr/local/bin/hostapd -dd /etc/hostapd/hostapd.conf ACS: Adjusting VHT center frequency wlp4s0: ACS-COMPLETED freq=5580 channel=116 Completing interface initialization Mode: IEEE 802.11a Channel: 116 Frequency: 5580 MHz DFS 4 channels required radar detection DFS all channels available, (SKIP CAC): no DFS 0 chans unavailable - choose other channel: no wlp4s0: interface state ACS->DFS DFS start CAC on 5580 MHz wlp4s0: DFS-CAC-START freq=5580 chan=116 sec_chan=0, width=1, seg0=122, seg1=0, cac_time=60s Can't set freq params DFS start_dfs_cac() failed, -1 Interface initialization failed wlp4s0: interface state DFS->DISABLED wlp4s0: AP-DISABLED ACS: Possibly channel configuration is invalid, please report this along with your config file. ACS: Failed to start wlp4s0: AP-DISABLED wlp4s0: Deauthenticate all stations nl80211: send_mlme - da= ff:ff:ff:ff:ff:ff noack=0 freq=0 no_cck=0 offchanok=0 wait_time=0 fc=0xc0 (WLAN_FC_STYPE_DEAUTH) nlmode=3 nl80211: send_mlme -> send_frame nl80211: send_frame - Use bss->freq=0 nl80211: send_frame -> send_frame_cmd nl80211: CMD_FRAME freq=0 wait=0 no_cck=0 no_ack=0 offchanok=0 CMD_FRAME - hexdump(len=26): c0 00 00 00 ff ff ff ff ff ff 04 f0 21 1f 0f e5 04 f0 21 1f 0f e5 00 00 03 00 nl80211: Frame command failed: ret=-22 (Invalid argument) (freq=0 wait=0) hostapd_free_hapd_data: Interface wlp4s0 wasn't started hostapd_deinit_driver: driver=0x493c40 drv_priv=0x2555df0 -> hapd_deinit nl80211: deinit ifname=wlp4s0 disabled_11b_rates=0 nl80211: Remove monitor interface: refcount=0 nl80211: Remove beacon (ifindex=8) netlink: Operstate: ifindex=8 linkmode=0 (kernel-control), operstate=6 (IF_OPER_UP) nl80211: Set mode ifindex 8 iftype 2 (STATION) nl80211: Teardown AP(wlp4s0) - device_ap_sme=0 use_monitor=0 nl80211: Unsubscribe mgmt frames handle 0x888888888addb739 (AP teardown) hostapd_deinit_driver:bss[0]->drv_priv=0x2555df0 hostapd_cleanup_iface_partial(0x25535c0) Interface wlp4s0 disabled wlp4s0: interface state DISABLED->DISABLED hostapd_interface_deinit_free(0x25535c0) hostapd_interface_deinit_free: num_bss=1 conf->num_bss=1 hostapd_interface_deinit(0x25535c0) wlp4s0: interface state DISABLED->DISABLED hostapd_bss_deinit: deinit bss wlp4s0 wlp4s0: AP-DISABLED hostapd_cleanup(hapd=0x2554cc0 (wlp4s0)) hostapd_free_hapd_data: Interface wlp4s0 wasn't started hostapd_interface_deinit_free: driver=0x493c40 drv_priv=(nil) -> hapd_deinit hostapd_interface_free(0x25535c0) hostapd_interface_free: free hapd 0x2554cc0 hostapd_cleanup_iface(0x25535c0) hostapd_cleanup_iface_partial(0x25535c0) hostapd_cleanup_iface: free iface=0x25535c0 The configuration file /etc/hostapd/hostapd.conf ctrl_interface=/var/run/hostapd ctrl_interface_group=wheel bridge=br0 interface=wlp4s0 driver=nl80211 ssid=test-5g hw_mode=a max_num_sta=128 auth_algs=1 disassoc_low_ack=1 ieee80211h=1 ieee80211d=1 country_code=US channel=0 ieee80211ac=1 vht_oper_chwidth=1 vht_capab=[HT40+][LDPC][SHORT-GI-20][SHORT-GI-40][TX-STBC][RX-STBC1][DSSS_CCK-40] vht_oper_centr_freq_seg0_idx=42 wpa=3 wpa_key_mgmt=WPA-PSK wpa_passphrase=darkcrystal1 wpa_pairwise=CCMP -- Todd Lewis _______________________________________________ Hostap mailing list Hostap@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/hostap