為什麼 hostapd 服務無法使用基於 Intel AX200 的適配器啟動配置為 5 GHz 頻段的 AP？

March 5, 2021

我正在嘗試使用以下配置設置 AP：

Wi-Fi 適配器：TP-Link AX3000（基於 Intel AX200）
作業系統：Ubuntu Server 20.10 (groovy)
核心版本：5.8.0-44-generic
韌體：iwlwifi-cc-a0-55.ucode
AP服務：hostapd v2.9（也嘗試了最新原始碼的自定義建構）

我在加拿大和法國有兩個幾乎相同的設置。加拿大的一個 - 有效，另一個 - 沒有。當我試圖排除任何軟體配置差異時，我最終懷疑這個問題與監管領域有關。以下是失敗設置的詳細資訊。

由於此設置位於法國，因此我分別設置了監管域：

$ sudo iw reg set FR

驗證它我得到以下（最初）：

$ sudo iw reg set
global
country FR: DFS-ETSI
   (2400 - 2483 @ 40), (N/A, 20), (N/A)
   (5150 - 5250 @ 80), (N/A, 23), (N/A), NO-OUTDOOR, AUTO-BW
   (5250 - 5350 @ 80), (N/A, 20), (0 ms), NO-OUTDOOR, DFS, AUTO-BW
   (5470 - 5725 @ 160), (N/A, 26), (0 ms), DFS
   (5725 - 5875 @ 80), (N/A, 13), (N/A)
   (57000 - 66000 @ 2160), (N/A, 40), (N/A)

phy#10 (self-managed)
country 00: DFS-UNSET
   (2402 - 2437 @ 40), (6, 22), (N/A), AUTO-BW, NO-HT40MINUS, NO-80MHZ, NO-160MHZ
   (2422 - 2462 @ 40), (6, 22), (N/A), AUTO-BW, NO-80MHZ, NO-160MHZ
   (2447 - 2482 @ 40), (6, 22), (N/A), AUTO-BW, NO-HT40PLUS, NO-80MHZ, NO-160MHZ
   (5170 - 5190 @ 160), (6, 22), (N/A), NO-OUTDOOR, AUTO-BW, IR-CONCURRENT, NO-HT40MINUS, PASSIVE-SCAN
   (5190 - 5210 @ 160), (6, 22), (N/A), NO-OUTDOOR, AUTO-BW, IR-CONCURRENT, NO-HT40PLUS, PASSIVE-SCAN
   (5210 - 5230 @ 160), (6, 22), (N/A), NO-OUTDOOR, AUTO-BW, IR-CONCURRENT, NO-HT40MINUS, PASSIVE-SCAN
   (5230 - 5250 @ 160), (6, 22), (N/A), NO-OUTDOOR, AUTO-BW, IR-CONCURRENT, NO-HT40PLUS, PASSIVE-SCAN
   (5250 - 5270 @ 160), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40MINUS, PASSIVE-SCAN
   (5270 - 5290 @ 160), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40PLUS, PASSIVE-SCAN
   (5290 - 5310 @ 160), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40MINUS, PASSIVE-SCAN
   (5310 - 5330 @ 160), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40PLUS, PASSIVE-SCAN
   (5490 - 5510 @ 240), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40MINUS, PASSIVE-SCAN
   (5510 - 5530 @ 240), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40PLUS, PASSIVE-SCAN
   (5530 - 5550 @ 240), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40MINUS, PASSIVE-SCAN
   (5550 - 5570 @ 240), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40PLUS, PASSIVE-SCAN
   (5570 - 5590 @ 240), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40MINUS, PASSIVE-SCAN
   (5590 - 5610 @ 240), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40PLUS, PASSIVE-SCAN
   (5610 - 5630 @ 240), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40MINUS, PASSIVE-SCAN
   (5630 - 5650 @ 240), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40PLUS, PASSIVE-SCAN
   (5650 - 5670 @ 80), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40MINUS, NO-160MHZ, PASSIVE-SCAN
   (5670 - 5690 @ 80), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40PLUS, NO-160MHZ, PASSIVE-SCAN
   (5690 - 5710 @ 80), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40MINUS, NO-160MHZ, PASSIVE-SCAN
   (5710 - 5730 @ 80), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40PLUS, NO-160MHZ, PASSIVE-SCAN
   (5735 - 5755 @ 80), (6, 22), (N/A), AUTO-BW, IR-CONCURRENT, NO-HT40MINUS, NO-160MHZ, PASSIVE-SCAN
   (5755 - 5775 @ 80), (6, 22), (N/A), AUTO-BW, IR-CONCURRENT, NO-HT40PLUS, NO-160MHZ, PASSIVE-SCAN
   (5775 - 5795 @ 80), (6, 22), (N/A), AUTO-BW, IR-CONCURRENT, NO-HT40MINUS, NO-160MHZ, PASSIVE-SCAN
   (5795 - 5815 @ 80), (6, 22), (N/A), AUTO-BW, IR-CONCURRENT, NO-HT40PLUS, NO-160MHZ, PASSIVE-SCAN
   (5815 - 5835 @ 20), (6, 22), (N/A), AUTO-BW, IR-CONCURRENT, NO-HT40MINUS, NO-HT40PLUS, NO-80MHZ, NO-160MHZ, PASSIVE-SCAN

要設置 phy#10 介面的國家/地區值，我使用以下命令觸發掃描：

$ sudo iw dev wlp3s0 scan

然後我再次驗證監管設置以確認適配器正確確定它：

$ sudo iw reg get    
global
   country FR: DFS-ETSI
       (2400 - 2483 @ 40), (N/A, 20), (N/A)
       (5150 - 5250 @ 80), (N/A, 23), (N/A), NO-OUTDOOR, AUTO-BW
       (5250 - 5350 @ 80), (N/A, 20), (0 ms), NO-OUTDOOR, DFS, AUTO-BW
       (5470 - 5725 @ 160), (N/A, 26), (0 ms), DFS
       (5725 - 5875 @ 80), (N/A, 13), (N/A)
       (57000 - 66000 @ 2160), (N/A, 40), (N/A)
    
   phy#10 (self-managed)
   country FR: DFS-UNSET
       (2402 - 2437 @ 40), (6, 22), (N/A), AUTO-BW, NO-HT40MINUS, NO-80MHZ, NO-160MHZ
       (2422 - 2462 @ 40), (6, 22), (N/A), AUTO-BW, NO-80MHZ, NO-160MHZ
       (2447 - 2482 @ 40), (6, 22), (N/A), AUTO-BW, NO-HT40PLUS, NO-80MHZ, NO-160MHZ
       (5170 - 5190 @ 160), (6, 22), (N/A), NO-OUTDOOR, AUTO-BW, IR-CONCURRENT, NO-HT40MINUS, PASSIVE-SCAN
       (5190 - 5210 @ 160), (6, 22), (N/A), NO-OUTDOOR, AUTO-BW, IR-CONCURRENT, NO-HT40PLUS, PASSIVE-SCAN
       (5210 - 5230 @ 160), (6, 22), (N/A), NO-OUTDOOR, AUTO-BW, IR-CONCURRENT, NO-HT40MINUS, PASSIVE-SCAN
       (5230 - 5250 @ 160), (6, 22), (N/A), NO-OUTDOOR, AUTO-BW, IR-CONCURRENT, NO-HT40PLUS, PASSIVE-SCAN
       (5250 - 5270 @ 160), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40MINUS, PASSIVE-SCAN
       (5270 - 5290 @ 160), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40PLUS, PASSIVE-SCAN
       (5290 - 5310 @ 160), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40MINUS, PASSIVE-SCAN
       (5310 - 5330 @ 160), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40PLUS, PASSIVE-SCAN
       (5490 - 5510 @ 240), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40MINUS, PASSIVE-SCAN
       (5510 - 5530 @ 240), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40PLUS, PASSIVE-SCAN
       (5530 - 5550 @ 240), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40MINUS, PASSIVE-SCAN
       (5550 - 5570 @ 240), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40PLUS, PASSIVE-SCAN
       (5570 - 5590 @ 240), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40MINUS, PASSIVE-SCAN
       (5590 - 5610 @ 240), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40PLUS, PASSIVE-SCAN
       (5610 - 5630 @ 240), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40MINUS, PASSIVE-SCAN
       (5630 - 5650 @ 240), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40PLUS, PASSIVE-SCAN
       (5650 - 5670 @ 80), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40MINUS, NO-160MHZ, PASSIVE-SCAN
       (5670 - 5690 @ 80), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40PLUS, NO-160MHZ, PASSIVE-SCAN
       (5690 - 5710 @ 80), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40MINUS, NO-160MHZ, PASSIVE-SCAN
       (5710 - 5730 @ 80), (6, 22), (0 ms), DFS, AUTO-BW, NO-HT40PLUS, NO-160MHZ, PASSIVE-SCAN
       (5735 - 5755 @ 80), (6, 22), (N/A), AUTO-BW, NO-HT40MINUS, NO-160MHZ
       (5755 - 5775 @ 80), (6, 22), (N/A), AUTO-BW, NO-HT40PLUS, NO-160MHZ
       (5775 - 5795 @ 80), (6, 22), (N/A), AUTO-BW, NO-HT40MINUS, NO-160MHZ
       (5795 - 5815 @ 80), (6, 22), (N/A), AUTO-BW, NO-HT40PLUS, NO-160MHZ
       (5815 - 5835 @ 20), (6, 22), (N/A), AUTO-BW, NO-HT40MINUS, NO-HT40PLUS, NO-80MHZ, NO-160MHZ

此時，iw list給出以下輸出（截斷以最小化內容）：

Frequencies:
   * 5180 MHz [36] (22.0 dBm) (no IR)
   * 5200 MHz [40] (22.0 dBm) (no IR)
   * 5220 MHz [44] (22.0 dBm) (no IR)
   * 5240 MHz [48] (22.0 dBm) (no IR)
   * 5260 MHz [52] (22.0 dBm) (no IR, radar detection)
   * 5280 MHz [56] (22.0 dBm) (no IR, radar detection)
   * 5300 MHz [60] (22.0 dBm) (no IR, radar detection)
   * 5320 MHz [64] (22.0 dBm) (no IR, radar detection)
   * 5340 MHz [68] (disabled)
   * 5360 MHz [72] (disabled)
   * 5380 MHz [76] (disabled)
   * 5400 MHz [80] (disabled)
   * 5420 MHz [84] (disabled)
   * 5440 MHz [88] (disabled)
   * 5460 MHz [92] (disabled)
   * 5480 MHz [96] (disabled)
   * 5500 MHz [100] (22.0 dBm) (no IR, radar detection)
   * 5520 MHz [104] (22.0 dBm) (no IR, radar detection)
   * 5540 MHz [108] (22.0 dBm) (no IR, radar detection)
   * 5560 MHz [112] (22.0 dBm) (no IR, radar detection)
   * 5580 MHz [116] (22.0 dBm) (no IR, radar detection)
   * 5600 MHz [120] (22.0 dBm) (no IR, radar detection)
   * 5620 MHz [124] (22.0 dBm) (no IR, radar detection)
   * 5640 MHz [128] (22.0 dBm) (no IR, radar detection)
   * 5660 MHz [132] (22.0 dBm) (no IR, radar detection)
   * 5680 MHz [136] (22.0 dBm) (no IR, radar detection)
   * 5700 MHz [140] (22.0 dBm) (no IR, radar detection)
   * 5720 MHz [144] (22.0 dBm) (no IR, radar detection)
   * 5745 MHz [149] (22.0 dBm)
   * 5765 MHz [153] (22.0 dBm)
   * 5785 MHz [157] (22.0 dBm)
   * 5805 MHz [161] (22.0 dBm)
   * 5825 MHz [165] (22.0 dBm)
   * 5845 MHz [169] (disabled)
   * 5865 MHz [173] (disabled)
   * 5885 MHz [177] (disabled)
   * 5905 MHz [181] (disabled)

具有以下內容hostapd.conf：

ctrl_interface=/var/run/hostapd/
interface=wlan0  # overwritten with -i option
driver=nl80211
country_code=FR
ieee80211n=1
hw_mode=a
ieee80211ac=1
channel=149  # 5745 MHz
require_ht=1
require_vht=1
ieee80211d=1  # no impact on result with 0 as well
ieee80211h=1  # no impact on result with 0 as well
ssid=test-open
ieee80211w=2
auth_algs=1
wpa=0

我得到以下輸出：

$ sudo hostapd /etc/hostapd/hostapd-5ghz-open.conf -i wlp3s0 -dd
random: Trying to read entropy from /dev/random
Configuration file: /etc/hostapd/hostapd-5ghz-open.conf
nl80211: TDLS supported
nl80211: TDLS external setup
nl80211: Supported cipher 00-0f-ac:1
nl80211: Supported cipher 00-0f-ac:5
nl80211: Supported cipher 00-0f-ac:2
nl80211: Supported cipher 00-0f-ac:4
nl80211: Supported cipher 00-0f-ac:8
nl80211: Supported cipher 00-0f-ac:9
nl80211: Supported cipher 00-0f-ac:6
nl80211: Supported cipher 00-0f-ac:11
nl80211: Supported cipher 00-0f-ac:12
nl80211: Using driver-based off-channel TX
nl80211: Driver-advertised extended capabilities (default) - hexdump(len=8): 04 00 00 00 00 00 00 40
nl80211: Driver-advertised extended capabilities mask (default) - hexdump(len=8): 04 00 00 00 00 00 00 40
nl80211: Driver-advertised extended capabilities for interface type STATION
nl80211: Extended capabilities - hexdump(len=10): 04 00 40 00 00 00 00 40 00 20
nl80211: Extended capabilities mask - hexdump(len=10): 04 00 40 00 00 00 00 40 00 20
nl80211: Use separate P2P group interface (driver advertised support)
nl80211: Enable multi-channel concurrent (driver advertised support)
nl80211: use P2P_DEVICE support
nl80211: key_mgmt=0x1ff0f enc=0x76f auth=0x7 flags=0x5800530fb5bfbe0 rrm_flags=0x79 probe_resp_offloads=0x0 max_stations=0 max_remain_on_chan=10000 max_scan_ssids=20
nl80211: interface wlp3s0 in phy phy10
nl80211: Set mode ifindex 14 iftype 3 (AP)
nl80211: Failed to set interface 14 to mode 3: -16 (Device or resource busy)
nl80211: Try mode change after setting interface down
nl80211: Set mode ifindex 14 iftype 3 (AP)
nl80211: Mode change succeeded while interface is down
nl80211: Setup AP(wlp3s0) - device_ap_sme=0 use_monitor=0
nl80211: Subscribe to mgmt frames with AP handle 0x55cefdc6f780
nl80211: Register frame type=0xb0 (WLAN_FC_STYPE_AUTH) nl_handle=0x55cefdc6f780 match= multicast=0
nl80211: Register frame type=0x0 (WLAN_FC_STYPE_ASSOC_REQ) nl_handle=0x55cefdc6f780 match= multicast=0
nl80211: Register frame type=0x20 (WLAN_FC_STYPE_REASSOC_REQ) nl_handle=0x55cefdc6f780 match= multicast=0
nl80211: Register frame type=0xa0 (WLAN_FC_STYPE_DISASSOC) nl_handle=0x55cefdc6f780 match= multicast=0
nl80211: Register frame type=0xc0 (WLAN_FC_STYPE_DEAUTH) nl_handle=0x55cefdc6f780 match= multicast=0
nl80211: Register frame type=0x40 (WLAN_FC_STYPE_PROBE_REQ) nl_handle=0x55cefdc6f780 match= multicast=0
nl80211: Register frame type=0xd0 (WLAN_FC_STYPE_ACTION) nl_handle=0x55cefdc6f780 match=04 multicast=0
nl80211: Register frame type=0xd0 (WLAN_FC_STYPE_ACTION) nl_handle=0x55cefdc6f780 match=0501 multicast=0
nl80211: Register frame type=0xd0 (WLAN_FC_STYPE_ACTION) nl_handle=0x55cefdc6f780 match=0503 multicast=0
nl80211: Register frame type=0xd0 (WLAN_FC_STYPE_ACTION) nl_handle=0x55cefdc6f780 match=0504 multicast=0
nl80211: Register frame type=0xd0 (WLAN_FC_STYPE_ACTION) nl_handle=0x55cefdc6f780 match=06 multicast=0
nl80211: Register frame type=0xd0 (WLAN_FC_STYPE_ACTION) nl_handle=0x55cefdc6f780 match=08 multicast=0
nl80211: Register frame type=0xd0 (WLAN_FC_STYPE_ACTION) nl_handle=0x55cefdc6f780 match=09 multicast=0
nl80211: Register frame type=0xd0 (WLAN_FC_STYPE_ACTION) nl_handle=0x55cefdc6f780 match=0a multicast=0
nl80211: Register frame type=0xd0 (WLAN_FC_STYPE_ACTION) nl_handle=0x55cefdc6f780 match=11 multicast=0
nl80211: Register frame type=0xd0 (WLAN_FC_STYPE_ACTION) nl_handle=0x55cefdc6f780 match=7f multicast=0
rfkill: initial event: idx=10 type=1 op=0 soft=0 hard=0
nl80211: Add own interface ifindex 14 (ifidx_reason -1)
nl80211: if_indices[16]: 14(-1)
nl80211: Do not open EAPOL RX socket - using control port for RX
phy: phy10
BSS count 1, BSSID mask 00:00:00:00:00:00 (0 bits)
wlp3s0: interface state UNINITIALIZED-&gt;COUNTRY_UPDATE
Previous country code FR, new country code FR
nl80211: No channel number found for frequency 5905 MHz
nl80211: Regulatory information - country=00
nl80211: 2402-2437 @ 40 MHz 22 mBm
nl80211: 2422-2462 @ 40 MHz 22 mBm
nl80211: 2447-2482 @ 40 MHz 22 mBm
nl80211: 5170-5190 @ 160 MHz 22 mBm (no outdoor) (no IR)
nl80211: 5190-5210 @ 160 MHz 22 mBm (no outdoor) (no IR)
nl80211: 5210-5230 @ 160 MHz 22 mBm (no outdoor) (no IR)
nl80211: 5230-5250 @ 160 MHz 22 mBm (no outdoor) (no IR)
nl80211: 5250-5270 @ 160 MHz 22 mBm (DFS) (no IR)
nl80211: 5270-5290 @ 160 MHz 22 mBm (DFS) (no IR)
nl80211: 5290-5310 @ 160 MHz 22 mBm (DFS) (no IR)
nl80211: 5310-5330 @ 160 MHz 22 mBm (DFS) (no IR)
nl80211: 5490-5510 @ 240 MHz 22 mBm (DFS) (no IR)
nl80211: 5510-5530 @ 240 MHz 22 mBm (DFS) (no IR)
nl80211: 5530-5550 @ 240 MHz 22 mBm (DFS) (no IR)
nl80211: 5550-5570 @ 240 MHz 22 mBm (DFS) (no IR)
nl80211: 5570-5590 @ 240 MHz 22 mBm (DFS) (no IR)
nl80211: 5590-5610 @ 240 MHz 22 mBm (DFS) (no IR)
nl80211: 5610-5630 @ 240 MHz 22 mBm (DFS) (no IR)
nl80211: 5630-5650 @ 240 MHz 22 mBm (DFS) (no IR)
nl80211: 5650-5670 @ 80 MHz 22 mBm (DFS) (no IR)
nl80211: 5670-5690 @ 80 MHz 22 mBm (DFS) (no IR)
nl80211: 5690-5710 @ 80 MHz 22 mBm (DFS) (no IR)
nl80211: 5710-5730 @ 80 MHz 22 mBm (DFS) (no IR)
nl80211: 5735-5755 @ 80 MHz 22 mBm (no IR)
nl80211: 5755-5775 @ 80 MHz 22 mBm (no IR)
nl80211: 5775-5795 @ 80 MHz 22 mBm (no IR)
nl80211: 5795-5815 @ 80 MHz 22 mBm (no IR)
nl80211: 5815-5835 @ 20 MHz 22 mBm (no IR)
nl80211: Added 802.11b mode based on 802.11g information
nl80211: Mode IEEE 802.11g: 2412 2417 2422 2427 2432 2437 2442 2447 2452 2457 2462 2467 2472 2484[DISABLED]
nl80211: Mode IEEE 802.11a: 5180[NO_IR] 5200[NO_IR] 5220[NO_IR] 5240[NO_IR] 5260[NO_IR][RADAR] 5280[NO_IR][RADAR] 5300[NO_IR][RADAR] 5320[NO_IR][RADAR] 5340[DISABLED] 5360[DISABLED] 5380[DISABLED] 5400[DISABLED] 5420[DISABLED]
nl80211: Mode IEEE 802.11b: 2412 2417 2422 2427 2432 2437 2442 2447 2452 2457 2462 2467 2472 2484[DISABLED]
Allowed channel: mode=1 chan=1 freq=2412 MHz max_tx_power=22 dBm
Allowed channel: mode=1 chan=2 freq=2417 MHz max_tx_power=22 dBm
Allowed channel: mode=1 chan=3 freq=2422 MHz max_tx_power=22 dBm
Allowed channel: mode=1 chan=4 freq=2427 MHz max_tx_power=22 dBm
Allowed channel: mode=1 chan=5 freq=2432 MHz max_tx_power=22 dBm
Allowed channel: mode=1 chan=6 freq=2437 MHz max_tx_power=22 dBm
Allowed channel: mode=1 chan=7 freq=2442 MHz max_tx_power=22 dBm
Allowed channel: mode=1 chan=8 freq=2447 MHz max_tx_power=22 dBm
Allowed channel: mode=1 chan=9 freq=2452 MHz max_tx_power=22 dBm
Allowed channel: mode=1 chan=10 freq=2457 MHz max_tx_power=22 dBm
Allowed channel: mode=1 chan=11 freq=2462 MHz max_tx_power=22 dBm
Allowed channel: mode=1 chan=12 freq=2467 MHz max_tx_power=22 dBm
Allowed channel: mode=1 chan=13 freq=2472 MHz max_tx_power=22 dBm
Allowed channel: mode=0 chan=1 freq=2412 MHz max_tx_power=22 dBm
Allowed channel: mode=0 chan=2 freq=2417 MHz max_tx_power=22 dBm
Allowed channel: mode=0 chan=3 freq=2422 MHz max_tx_power=22 dBm
Allowed channel: mode=0 chan=4 freq=2427 MHz max_tx_power=22 dBm
Allowed channel: mode=0 chan=5 freq=2432 MHz max_tx_power=22 dBm
Allowed channel: mode=0 chan=6 freq=2437 MHz max_tx_power=22 dBm
Allowed channel: mode=0 chan=7 freq=2442 MHz max_tx_power=22 dBm
Allowed channel: mode=0 chan=8 freq=2447 MHz max_tx_power=22 dBm
Allowed channel: mode=0 chan=9 freq=2452 MHz max_tx_power=22 dBm
Allowed channel: mode=0 chan=10 freq=2457 MHz max_tx_power=22 dBm
Allowed channel: mode=0 chan=11 freq=2462 MHz max_tx_power=22 dBm
Allowed channel: mode=0 chan=12 freq=2467 MHz max_tx_power=22 dBm
Allowed channel: mode=0 chan=13 freq=2472 MHz max_tx_power=22 dBm
Frequency 5745 (primary) not allowed for AP mode, flags: 0x20053 NO-IR
Primary frequency not allowed
wlp3s0: IEEE 802.11 Configured channel (149) or frequency (5745) (secondary_channel=0) not found from the channel list of the current mode (2) IEEE 802.11a
wlp3s0: IEEE 802.11 Hardware does not support configured channel
Could not select hw_mode and channel. (-3)
wlp3s0: interface state COUNTRY_UPDATE-&gt;DISABLED
wlp3s0: AP-DISABLED
wlp3s0: Unable to setup interface.
hostapd_interface_deinit_free(0x55cefdc67e00)
hostapd_interface_deinit_free: num_bss=1 conf-&gt;num_bss=1
hostapd_interface_deinit(0x55cefdc67e00)
wlp3s0: interface state DISABLED-&gt;DISABLED
hostapd_bss_deinit: deinit bss wlp3s0
wlp3s0: 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 no_encrypt=0 fc=0xc0 (WLAN_FC_STYPE_DEAUTH) nlmode=3
nl80211: send_mlme - Use bss-&gt;freq=0
nl80211: send_mlme -&gt; 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 5c 80 b6 b8 dd af 5c 80 b6 b8 dd af 00 00 03 00
nl80211: Frame command failed: ret=-22 (Invalid argument) (freq=0 wait=0)
wlp3s0: AP-DISABLED
hostapd_cleanup(hapd=0x55cefdc68fe0 (wlp3s0))
wlp3s0: CTRL-EVENT-TERMINATING
hostapd_free_hapd_data: Interface wlp3s0 wasn't started
hostapd_interface_deinit_free: driver=0x55cefc144c60 drv_priv=0x55cefdc6a1f0 -&gt; hapd_deinit
nl80211: deinit ifname=wlp3s0 disabled_11b_rates=0
nl80211: Remove monitor interface: refcount=0
nl80211: Remove beacon (ifindex=14)
netlink: Operstate: ifindex=14 linkmode=0 (kernel-control), operstate=6 (IF_OPER_UP)
nl80211: Set mode ifindex 14 iftype 2 (STATION)
nl80211: Failed to set interface 14 to mode 2: -16 (Device or resource busy)
nl80211: Try mode change after setting interface down
nl80211: Set mode ifindex 14 iftype 2 (STATION)
nl80211: Mode change succeeded while interface is down
nl80211: Teardown AP(wlp3s0) - device_ap_sme=0 use_monitor=0
nl80211: Unsubscribe mgmt frames handle 0x8888dd46754e7f09 (AP teardown)
hostapd_interface_free(0x55cefdc67e00)
hostapd_interface_free: free hapd 0x55cefdc68fe0
hostapd_cleanup_iface(0x55cefdc67e00)
hostapd_cleanup_iface_partial(0x55cefdc67e00)
hostapd_cleanup_iface: free iface=0x55cefdc67e00

上面的以下幾行引發了我的擔憂：

wlp3s0: interface state UNINITIALIZED-&gt;COUNTRY_UPDATE
Previous country code FR, new country code FR
nl80211: No channel number found for frequency 5905 MHz
nl80211: Regulatory information - country=00

如果我設置了正確的國家/地區值，為什麼監管資訊會重置為世界域？它是由nl80211驅動程序、hostapd服務、硬體還是其他原因引起的？我將不勝感激任何可以使我對這個主題有所了解的想法。

令我驚訝的是，解決方案是安裝network-manager軟體包。不需要額外的配置，甚至不需要設置由 NetworkManager 管理的無線介面。我在另一個系統（帶有 Ubuntu Server 20.04 的 Raspberry Pi CM4 板）上複製了相同的行為。
請注意，Ubuntu Serversystemd-networkd作為管理網路的預設服務提供，而 Ubuntu Desktop 則提供 NetworkManager。

我查看了列表，英特爾® Wi-Fi 6 AX200 160MHz 顯示：
2.4GHz 上的 AP 模式（在由 iwlmvm 驅動的設備上）
https://wireless.wiki.kernel.org/en/users/drivers/iwlwifi

引用自：https://unix.stackexchange.com/questions/636667

為什麼 hostapd 服務無法使用基於 Intel AX200 的適配器啟動配置為 5 GHz 頻段的 AP？

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