Ubuntu 16.04:Broadcom BCM43142 无法检测 5Ghz wifi 网络,即使它应该能够

Ubuntu 16.04:Broadcom BCM43142 无法检测 5Ghz wifi 网络,即使它应该能够

不久前,我在 Windows 笔记本电脑上安装了 Ubuntu 16.04,我发现 wifi 连接比以前更差了:现在 5ghz wifi 网络不会显示在网络管理器界面上,即使检测到 2.4ghz 网络并且工作正常。这台笔记本电脑是华硕 A555L 型号

的输出iwlist wlp3s0 channel为:

wlp3s0    32 channels in total; available frequencies :
      Channel 01 : 2.412 GHz
      Channel 02 : 2.417 GHz
      Channel 03 : 2.422 GHz
      Channel 04 : 2.427 GHz
      Channel 05 : 2.432 GHz
      Channel 06 : 2.437 GHz
      Channel 07 : 2.442 GHz
      Channel 08 : 2.447 GHz
      Channel 09 : 2.452 GHz
      Channel 10 : 2.457 GHz
      Channel 11 : 2.462 GHz
      Channel 12 : 2.467 GHz
      Channel 13 : 2.472 GHz
      Channel 14 : 2.484 GHz
      Channel 36 : 5.18 GHz
      Channel 38 : 5.19 GHz
      Channel 40 : 5.2 GHz
      Channel 42 : 5.21 GHz
      Channel 44 : 5.22 GHz
      Channel 46 : 5.23 GHz
      Channel 48 : 5.24 GHz
      Channel 52 : 5.26 GHz
      Channel 56 : 5.28 GHz
      Channel 60 : 5.3 GHz
      Channel 64 : 5.32 GHz
      Channel 100 : 5.5 GHz
      Channel 104 : 5.52 GHz
      Channel 108 : 5.54 GHz
      Channel 112 : 5.56 GHz
      Channel 116 : 5.58 GHz
      Channel 120 : 5.6 GHz
      Channel 124 : 5.62 GHz
      Current Frequency:2.462 GHz (Channel 11)

所以理论上我应该能够检测并使用 5ghz wifi 网络。

运行后dmesg发现一些错误看起来与这个问题有关:

ERROR @wl_cfg80211_scan : WLC_SCAN error (-22)
ERROR @wl_dev_intvar_get : error (-1)
ERROR @wl_cfg80211_get_tx_power : error (-1)

我尝试重新安装bcmwl-kernel-source驱动程序和我在谷歌上搜索到的其他东西,但没有任何效果。

iw list输出为:

Wiphy phy0
max # scan SSIDs: 1
max scan IEs length: 0 bytes
Retry short limit: 7
Retry long limit: 4
Coverage class: 0 (up to 0m)
Supported Ciphers:
    * WEP40 (00-0f-ac:1)
    * WEP104 (00-0f-ac:5)
    * TKIP (00-0f-ac:2)
    * CCMP (00-0f-ac:4)
    * CMAC (00-0f-ac:6)
Available Antennas: TX 0 RX 0
Supported interface modes:
     * IBSS
     * managed
Band 1:
    Bitrates (non-HT):
        * 1.0 Mbps
        * 2.0 Mbps (short preamble supported)
        * 5.5 Mbps (short preamble supported)
        * 11.0 Mbps (short preamble supported)
        * 6.0 Mbps
        * 9.0 Mbps
        * 12.0 Mbps
        * 18.0 Mbps
        * 24.0 Mbps
        * 36.0 Mbps
        * 48.0 Mbps
        * 54.0 Mbps
    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) (no IR)
        * 2472 MHz [13] (20.0 dBm) (no IR)
        * 2484 MHz [14] (20.0 dBm) (no IR)
Band 2:
    Bitrates (non-HT):
        * 6.0 Mbps
        * 9.0 Mbps
        * 12.0 Mbps
        * 18.0 Mbps
        * 24.0 Mbps
        * 36.0 Mbps
        * 48.0 Mbps
        * 54.0 Mbps
    Frequencies:
        * 5170 MHz [34] (disabled)
        * 5180 MHz [36] (20.0 dBm) (no IR)
        * 5190 MHz [38] (20.0 dBm) (no IR)
        * 5200 MHz [40] (20.0 dBm) (no IR)
        * 5210 MHz [42] (20.0 dBm) (no IR)
        * 5220 MHz [44] (20.0 dBm) (no IR)
        * 5230 MHz [46] (20.0 dBm) (no IR)
        * 5240 MHz [48] (20.0 dBm) (no IR)
        * 5260 MHz [52] (20.0 dBm) (no IR, radar detection)
          DFS state: usable (for 275 sec)
          DFS CAC time: 60000 ms
        * 5280 MHz [56] (20.0 dBm) (no IR, radar detection)
          DFS state: usable (for 275 sec)
          DFS CAC time: 60000 ms
        * 5300 MHz [60] (20.0 dBm) (no IR, radar detection)
          DFS state: usable (for 275 sec)
          DFS CAC time: 60000 ms
        * 5320 MHz [64] (20.0 dBm) (no IR, radar detection)
          DFS state: usable (for 275 sec)
          DFS CAC time: 60000 ms
        * 5500 MHz [100] (20.0 dBm) (no IR, radar detection)
          DFS state: usable (for 275 sec)
          DFS CAC time: 60000 ms
        * 5520 MHz [104] (20.0 dBm) (no IR, radar detection)
          DFS state: usable (for 275 sec)
          DFS CAC time: 60000 ms
        * 5540 MHz [108] (20.0 dBm) (no IR, radar detection)
          DFS state: usable (for 275 sec)
          DFS CAC time: 60000 ms
        * 5560 MHz [112] (20.0 dBm) (no IR, radar detection)
          DFS state: usable (for 275 sec)
          DFS CAC time: 60000 ms
        * 5580 MHz [116] (20.0 dBm) (no IR, radar detection)
          DFS state: usable (for 275 sec)
          DFS CAC time: 60000 ms
        * 5600 MHz [120] (20.0 dBm) (no IR, radar detection)
          DFS state: usable (for 275 sec)
          DFS CAC time: 60000 ms
        * 5620 MHz [124] (20.0 dBm) (no IR, radar detection)
          DFS state: usable (for 275 sec)
          DFS CAC time: 60000 ms
        * 5640 MHz [128] (20.0 dBm) (no IR, radar detection)
          DFS state: usable (for 275 sec)
          DFS CAC time: 60000 ms
        * 5660 MHz [132] (20.0 dBm) (no IR, radar detection)
          DFS state: usable (for 275 sec)
          DFS CAC time: 60000 ms
        * 5680 MHz [136] (20.0 dBm) (no IR, radar detection)
          DFS state: usable (for 275 sec)
          DFS CAC time: 60000 ms
        * 5700 MHz [140] (20.0 dBm) (no IR, radar detection)
          DFS state: usable (for 275 sec)
          DFS CAC time: 60000 ms
        * 5745 MHz [149] (20.0 dBm) (no IR)
        * 5765 MHz [153] (20.0 dBm) (no IR)
        * 5785 MHz [157] (20.0 dBm) (no IR)
        * 5805 MHz [161] (20.0 dBm) (no IR)
        * 5825 MHz [165] (20.0 dBm) (no IR)
        * 5920 MHz [184] (disabled)
        * 5940 MHz [188] (disabled)
        * 5960 MHz [192] (disabled)
        * 5980 MHz [196] (disabled)
        * 6000 MHz [200] (disabled)
        * 6020 MHz [204] (disabled)
        * 6040 MHz [208] (disabled)
        * 6060 MHz [212] (disabled)
        * 6080 MHz [216] (disabled)
Supported commands:
     * set_interface
     * new_key
     * join_ibss
     * set_pmksa
     * del_pmksa
     * flush_pmksa
     * connect
     * disconnect
software interface modes (can always be added):
interface combinations are not supported
Device supports scan flush.

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