我正在尝试使用 Hostapd 设置 5GHZ Wifi 网络。问题是我无法选择频道，因为我的所有 5ghz 频道都有 no-ir 标志，而且我无法修复它。我尝试了在互联网上找到的每一个解决方案。我还发现了一些帖子，有人声称无法使用英特尔适配器创建 5ghz 网络，但在其他帖子中，有些人可以让它工作。
网卡：Intel M2 AC 8265
司机：https://www.intel.de/content/www/de/de/support/articles/000005511/network-and-io/wireless-networking.html（适用于 8265 的版本）
驱动程序已成功加载（dmesg）：
[ 6.038802] iwlwifi 0000:01:00.0: loaded firmware version 22.361476.0 op_mode iwlmvm
[ 6.107372] iwlwifi 0000:01:00.0: Detected Intel(R) Dual Band Wireless AC 8265, REV=0x230
我目前的主要问题是“信息列表“没有显示‘no-IR’的频道，这意味着我无法在 ap 模式下运行：
Frequencies:
* 5180 MHz [36] (20.0 dBm) (no IR)
* 5200 MHz [40] (20.0 dBm) (no IR)
* 5220 MHz [44] (20.0 dBm) (no IR)
* 5240 MHz [48] (20.0 dBm) (no IR)
* 5260 MHz [52] (20.0 dBm) (no IR, radar detection)
* 5280 MHz [56] (20.0 dBm) (no IR, radar detection)
* 5300 MHz [60] (20.0 dBm) (no IR, radar detection)
* 5320 MHz [64] (20.0 dBm) (no IR, radar detection)
* 5340 MHz [68] (20.0 dBm) (no IR, radar detection)
* 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] (22.0 dBm) (no IR, radar detection)
* 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] (disabled)
* 5745 MHz [149] (13.0 dBm) (no IR)
* 5765 MHz [153] (13.0 dBm) (no IR)
* 5785 MHz [157] (13.0 dBm) (no IR)
* 5805 MHz [161] (13.0 dBm) (no IR)
* 5825 MHz [165] (13.0 dBm) (no IR)
Frequencies:
* 2412 MHz [1] (20.0 dBm)
* 2417 MHz [2] (20.0 dBm)
* 2422 MHz [3] (20.0 dBm)
* 2427 MHz [4] (20.0 dBm)
* 2432 MHz [5] (20.0 dBm)
* 2437 MHz [6] (20.0 dBm)
* 2442 MHz [7] (20.0 dBm)
* 2447 MHz [8] (20.0 dBm)
* 2452 MHz [9] (20.0 dBm)
* 2457 MHz [10] (20.0 dBm)
* 2462 MHz [11] (20.0 dBm)
* 2467 MHz [12] (20.0 dBm)
* 2472 MHz [13] (20.0 dBm)
大多数人可以通过使用 iw reg set 设置国家代码来解决问题。一开始，我的 iw reg get 显示的国家代码是 00，但我解决了这个问题，现在配置正确了：
global
country DE: DFS-ETSI
(2400 - 2483 @ 40), (N/A, 20), (N/A)
(5150 - 5250 @ 80), (N/A, 20), (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)
但“iw list”中没有任何变化。所有 5ghz 通道仍然无红外。
我也做了这样的设置：
sudo nano /etc/modprobe.d/cfg80211.conf
options cfg80211 ieee80211_regdom=DE
还禁用了 lar - 我红色，因为英特尔卡是必要的：
sudo nano /etc/modprobe.d/iwlwifi.conf
options iwlwifi lar_disable=1
并设置 regdomain：
sudo nano /etc/default/crda
REGDOMAIN=DE
更多信息请参见 hostapd 调试的输出片段：
nl80211: Regulatory information - country=DE (DFS-ETSI)
nl80211: 2400-2483 @ 40 MHz 20 mBm
nl80211: 5150-5250 @ 80 MHz 20 mBm (no outdoor)
nl80211: 5250-5350 @ 80 MHz 20 mBm (no outdoor) (DFS)
nl80211: 5470-5725 @ 160 MHz 26 mBm (DFS)
nl80211: 5725-5875 @ 80 MHz 13 mBm
nl80211: 57000-66000 @ 2160 MHz 40 mBm
nl80211: Added 802.11b mode based on 802.11g information
Allowed channel: mode=1 chan=1 freq=2412 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=2 freq=2417 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=3 freq=2422 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=4 freq=2427 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=5 freq=2432 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=6 freq=2437 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=7 freq=2442 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=8 freq=2447 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=9 freq=2452 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=10 freq=2457 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=11 freq=2462 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=12 freq=2467 MHz max_tx_power=20 dBm
Allowed channel: mode=1 chan=13 freq=2472 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=1 freq=2412 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=2 freq=2417 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=3 freq=2422 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=4 freq=2427 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=5 freq=2432 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=6 freq=2437 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=7 freq=2442 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=8 freq=2447 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=9 freq=2452 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=10 freq=2457 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=11 freq=2462 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=12 freq=2467 MHz max_tx_power=20 dBm
Allowed channel: mode=0 chan=13 freq=2472 MHz max_tx_power=20 dBm
channel [2] (44) is disabled for use in AP mode, flags: 0x36073 NO-IR
wlan0: IEEE 802.11 Configured channel (44) not found from the channel list of current mode (2) IEEE 802.11a
wlan0: IEEE 802.11 Hardware does not support configured channel
Could not select hw_mode and channel. (-3)
我不知道该怎么办了；也许有人已经解决了这个问题并且可以提供帮助。