热点网络创建时间过长，激活失败

Question 1

我在 Ubuntu 21.10 上也遇到了这个问题：

>nmcli connection up bridge-slave-wlp4s0
Error: Connection activation failed: 802.1X supplicant took too long to authenticate

最终唯一有帮助的是打开日志wpa_supplicant。

>wpa_cli -i wlp4s0 log_level debug
OK

之后您将开始看到debug登录journalctl -f。现在，过滤并跟踪日志：

journalctl  -f -u wpa_supplicant -u NetworkManager -u systemd-networkd

保持此打开状态，并在另一个会话中尝试激活您的连接。

就我而言，结果是与频道相关的各种问题，例如，甚至是另一个答案中建议的频道 120：

wpa_supplicant[1030]: Channel 120 (primary) not allowed for AP mode, flags: 0x17b NO-IR RADAR
wpa_supplicant[1030]: hostapd_logger: Configured channel (120) not found from the channel list of current mode (2) IEEE 802.11a
wpa_supplicant[1030]: hostapd_logger: Hardware does not support configured channel

您必须记住，有效渠道取决于许多因素，包括您所在的国家/地区：

iw reg get

就我而言，我有两个条目：

global
country 00: DFS-UNSET
    (2402 - 2472 @ 40), (N/A, 20), (N/A)
    ...


phy#0 (self-managed)
country CA: DFS-UNSET
    (2402 - 2437 @ 40), (6, 22), (N/A), AUTO-BW, NO-HT40MINUS, NO-80MHZ, NO-160MHZ
    ...

我使用以下命令将全局固定为我的国家：

iw reg set CA

您将获得一组适用于您所在地区的频率，并且可以与https://en.wikipedia.org/wiki/List_of_WLAN_channels找到等效的通道。

现在——这还不是我的全部。即使被报告为有效的通道（例如 42）最终也会失败：

wpa_supplicant[1030]: nl80211: Set freq 5210 (ht_enabled=0, vht_enabled=0, he_enabled=0, bandwidth=0 MHz, cf1=0 MHz, cf2=0 MHz)
wpa_supplicant[1030]:   * freq=5210
wpa_supplicant[1030]:   * he_enabled=0
wpa_supplicant[1030]:   * vht_enabled=0
wpa_supplicant[1030]:   * ht_enabled=0
wpa_supplicant[1030]:   * channel_type=0
wpa_supplicant[1030]: nl80211: kernel reports: Channel is disabled
wpa_supplicant[1030]: nl80211: Failed to set channel (freq=5210): -22 (Invalid argument)

（导致后来出现可怕的“热点网络创建花费太长时间”）

事实证明，尽管iw reg get正确猜测了我的区域，但未设置以下文件：

> cat /etc/default/crda
# Set REGDOMAIN to a ISO/IEC 3166-1 alpha2 country code so that iw(8) may set
# the initial regulatory domain setting for IEEE 802.11 devices which operate
# on this system.
#
# Governments assert the right to regulate usage of radio spectrum within
# their respective territories so make sure you select a ISO/IEC 3166-1 alpha2
# country code suitable for your location or you may infringe on local
# legislature. See `/usr/share/zoneinfo/zone.tab' for a table of timezone
# descriptions containing ISO/IEC 3166-1 alpha2 country codes.

REGDOMAIN=

就我而言，我调整REGDOMAIN=CA并重新启动

但还是失败了。

最后，我从日志中注意到这个调试条目：

wpa_supplicant[1029]: P2P: Add operating class 81
wpa_supplicant[1029]: P2P: Channels - hexdump(len=13): 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d
wpa_supplicant[1029]: P2P: Add operating class 124
wpa_supplicant[1029]: P2P: Channels - hexdump(len=4): 95 99 9d a1
wpa_supplicant[1029]: P2P: Add operating class 125
wpa_supplicant[1029]: P2P: Channels - hexdump(len=5): 95 99 9d a1 a5
wpa_supplicant[1029]: P2P: Add operating class 126
wpa_supplicant[1029]: P2P: Channels - hexdump(len=2): 95 9d
wpa_supplicant[1029]: P2P: Add operating class 127
wpa_supplicant[1029]: P2P: Channels - hexdump(len=2): 99 a1
wpa_supplicant[1029]: P2P: Update channel list
wpa_supplicant[1029]: P2P: channels: 81:1,2,3,4,5,6,7,8,9,10,11,12,13 124:149,153,157,161 125:149,153,157,161,165 126:149,157 127:153,161

所以我尝试了列出的渠道之一：

>nmcli connection modify bridge-slave-wlp4s0 wifi.channel 161
>nmcli connection up bridge-slave-wlp4s0
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/19)

它立即起作用了。

所以仍然不知道为什么我的一些频道受到限制，但是查看journalctl并将wpa日志设置为调试，您应该能够找到工作频道列表。

[编辑] 经过更多搜索后，我找到了某些频道不可用的原因。我的 Intel 卡不支持任何非 20Mhz 频段。

这列出了仅在客户端模式下支持的通道：

>iw phy phy0 info | grep "no IR"
phy phy0 info | grep "no IR"
            * 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)
            * 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)

该列表中的其他频道将显示为disabled- 所以最后，这就是我用来列出可用频道的内容：

iw phy phy0 info | grep "MHz \[" | grep -v "no IR" | grep -v "disabled"
            * 2412 MHz [1] (22.0 dBm)
            * 2417 MHz [2] (22.0 dBm)
            * 2422 MHz [3] (22.0 dBm)
            * 2427 MHz [4] (22.0 dBm)
            * 2432 MHz [5] (22.0 dBm)
            * 2437 MHz [6] (22.0 dBm)
            * 2442 MHz [7] (22.0 dBm)
            * 2447 MHz [8] (22.0 dBm)
            * 2452 MHz [9] (22.0 dBm)
            * 2457 MHz [10] (22.0 dBm)
            * 2462 MHz [11] (22.0 dBm)
            * 2467 MHz [12] (22.0 dBm)
            * 2472 MHz [13] (22.0 dBm)
            * 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)

Answer