如何在Ubuntu Gnome 16.04或18.04中使英特尔Wi-Fi信号更强？

出于某种原因，我不知道，我的wifi信号在Linux中非常弱，但在Windows中是可以的。 速度似乎不是问题，但与wifi信号本身的强度有关。 我正在使用华硕N580VD-DM129T，我在Linux Ubuntu 16.04和Gnome中使用了英特尔（R）双频无线AC 8265的iwlwifi驱动程序。 （我使用dmesg | grep iwlwifi检查了网卡的名称，并查找输出线“Detected Intel（R）Dual Band Wireless AC 8265，REV = 0x230”）。 我也试过运行Ubuntu 18.04但仍然遇到了同样的问题。

我运行dmesg | grep iwlwifi时的输出 dmesg | grep iwlwifi是以下内容：

 [ 3.347436] iwlwifi 0000:03:00.0: enabling device (0000 -> 0002) [ 3.386096] iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-8265-33.ucode failed with error -2 [ 3.388185] iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-8265-32.ucode failed with error -2 [ 3.397339] iwlwifi 0000:03:00.0: loaded firmware version 31.560484.0 op_mode iwlmvm [ 3.412232] iwlwifi 0000:03:00.0: Detected Intel(R) Dual Band Wireless AC 8265, REV=0x230 [ 3.472665] iwlwifi 0000:03:00.0: base HW address: 88:b1:11:5e:93:f4 [ 3.550283] iwlwifi 0000:03:00.0 wlp3s0: renamed from wlan0 

我认为在成功之前加载失败两次是奇怪的，并且想知道这是否是问题，但不是因为这个。 我在https://wireless.wiki.kernel.org/en/users/Drivers/iwlwifi上安装了iwlwifi-8265-ucode-22.361476.0.tgz，它失败了很多次（33,32,31，直到23，然后使用版本22）。 所以它只是搜索可用的版本。

我也试过更改iwlwifi模块中的一些选项，如此处所示 。 但它没有用。 更准确地说，我在文件/etc/modprobe.d/iwlwifi.conf的末尾添加了options iwlwifi 11n_disable=1 swcrypto=1 。 让我留下以下内容：

 remove iwlwifi \ (/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \ && /sbin/modprobe -r mac80211 options iwlwifi 11n_disable=1 swcrypto=1 

即使我运行$sudo modprobe -rv iwlwifi删除模块然后$sudo modprobe -v iwlwifi再次添加它，这也$sudo modprobe -v iwlwifi 。

编辑2 ：我也尝试使用Linux 17.10和18.04，但仍然遇到了同样的问题（与Windows相比信号较弱）。

编辑3 ：尝试为realtek建议的东西也不起作用： sudo modprobe -v iwlwifi ant_sel=2

How to solve Realtek RTL8723BE weak wifi signal problem in ubuntu

编辑5 ：尝试改变电源管理运行

  sudo sed -i 's/wifi.powersave = 3/wifi.powersave = 2/' /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf 

然后systemctl restart network-manager.service也无法正常工作。 这是在这里和这里提出的。 此链接说明了如何执行此操作。

编辑4 ：当我运行$ nmcli dev wifi list我得到以下结果：

 * SSID MODE CHAN RATE SIGNAL BARS SECURITY neuromancer Infra 11 54 Mbit/s 59 ▂▄▆_ WPA2 * waffles Infra 11 54 Mbit/s 48 ▂▄__ WPA2 Stephens_iMac Infra 11 54 Mbit/s 47 ▂▄__ WPA2 eduroam Infra 11 54 Mbit/s 45 ▂▄__ WPA2 802.1X mac-sfg003 Infra 11 54 Mbit/s 42 ▂▄__ Crumpet Infra 11 54 Mbit/s 37 ▂▄__ 

Neuromancer实际上离我只有2.5米，但仍然不是全力。 （请注意，EDIT 4和EDIT 1在不同的日子运行，因此找到了不同的网络）

编辑1 ：运行$ sudo iwlist scan给我以下输出

  lo Interface doesn't support scanning. enp4s0 Interface doesn't support scanning. wlp3s0 Scan completed : Cell 01 - Address: 58:97:1E:72:D0:A1 Channel:1 Frequency:2.412 GHz (Channel 1) Quality=46/70 Signal level=-64 dBm Encryption key:on ESSID:"eduroam" Bit Rates:12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s 54 Mb/s Mode:Master Extra:tsf=00000078646f81d9 Extra: Last beacon: 4328ms ago IE: Unknown: 0007656475726F616D IE: Unknown: 01061824B048606C IE: Unknown: 030101 IE: Unknown: 050700010900200000 IE: Unknown: 0706474220010D14 IE: Unknown: 0B051B006F093D IE: Unknown: 200100 IE: Unknown: 2A0100 IE: Unknown: 2D1A2C181BFFFF000000000000000000000000000000000000000000 IE: IEEE 802.11i/WPA2 Version 1 Group Cipher : CCMP Pairwise Ciphers (1) : CCMP Authentication Suites (1) : 802.1x IE: Unknown: 3603E21600 IE: Unknown: 3D1601000700000000000000000000000000000000000000 IE: Unknown: 460573C0000000 IE: Unknown: 7F06001000000140 IE: Unknown: 851E27008F000F00FF035900636E63622D6C61625F617265615F6C001B000036 IE: Unknown: 9606004096001100 IE: Unknown: DD180050F2020101800003A44F0027A44F004243800072324100 IE: Unknown: DD06004096010104 IE: Unknown: DD050040960305 IE: Unknown: DD050040960B69 IE: Unknown: DD050040961409 IE: Unknown: DD16000B85F800015AA6AA0DD0F287C653371F84DC6C1608 Cell 02 - Address: 58:97:1E:72:D0:A0 Channel:1 Frequency:2.412 GHz (Channel 1) Quality=47/70 Signal level=-63 dBm Encryption key:off ESSID:"OWL" Bit Rates:12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s; 48 Mb/s 54 Mb/s Mode:Master Extra:tsf=0000007864711990 Extra: Last beacon: 4272ms ago IE: Unknown: 00034F574C IE: Unknown: 01061824B048606C IE: Unknown: 030101 IE: Unknown: 050F000108002000000000000000010000 IE: Unknown: 0706474220010D14 IE: Unknown: 0B051B006F093D IE: Unknown: 2A0100 IE: Unknown: 2D1A2C181BFFFF000000000000000000000000000000000000000000 IE: Unknown: 3D1601000700000000000000000000000000000000000000 IE: Unknown: 7F06001000000140 IE: Unknown: 851E27008F000F00FF035900636E63622D6C61625F617265615F6C001B000036 IE: Unknown: 9606004096001100 IE: Unknown: DD180050F2020101800003A44F0027A44F004243800072324100 IE: Unknown: DD06004096010104 IE: Unknown: DD050040960305 IE: Unknown: DD050040960B09 IE: Unknown: DD050040961408 IE: Unknown: DD16000B85F800015AA6AA0D68445B38B7430C870C13ED10 Cell 03 - Address: 28:F0:76:49:02:32 Channel:11 Frequency:2.462 GHz (Channel 11) Quality=40/70 Signal level=-70 dBm Encryption key:on ESSID:"Stephens_iMac" Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s 24 Mb/s; 36 Mb/s; 54 Mb/s Bit Rates:6 Mb/s; 9 Mb/s; 12 Mb/s; 48 Mb/s Mode:Master Extra:tsf=0000073adbc53791 Extra: Last beacon: 3732ms ago IE: Unknown: 000D5374657068656E735F694D6163 IE: Unknown: 010882848B962430486C IE: Unknown: 03010B IE: Unknown: 2A0100 IE: Unknown: 32040C121860 IE: IEEE 802.11i/WPA2 Version 1 Group Cipher : CCMP Pairwise Ciphers (1) : CCMP Authentication Suites (1) : PSK IE: Unknown: 2D1AAD4917FFFFFF0000000000000000000000000000000000000000 IE: Unknown: 3D160B000400000000000000000000000000000000000000 IE: Unknown: 7F080400000000000040 IE: Unknown: DD150017F209000108694D616331372C31010103010000 IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00 Cell 04 - Address: 58:97:1E:72:D0:AE Channel:100 Frequency:5.5 GHz (Channel 100) Quality=32/70 Signal level=-78 dBm Encryption key:on ESSID:"eduroam" Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s Mode:Master Extra:tsf=00000352afa2581c Extra: Last beacon: 2160ms ago IE: Unknown: 0007656475726F616D IE: Unknown: 0104B048606C IE: Unknown: 050400010100 IE: Unknown: 070C47422024081764051784031E IE: Unknown: 0B05010006093D IE: Unknown: 200100 IE: Unknown: 2D1A6E181BFFFF000000000000000000000000000000000000000000 IE: IEEE 802.11i/WPA2 Version 1 Group Cipher : CCMP Pairwise Ciphers (1) : CCMP Authentication Suites (1) : 802.1x IE: Unknown: 3603E21600 IE: Unknown: 3D1664050400000000000000000000000000000000000000 IE: Unknown: 460573C0000000 IE: Unknown: 7F06001000000140 IE: Unknown: 851E03008F000F00FF035900636E63622D6C61625F617265615F6C0001000035 IE: Unknown: 9606004096001100 IE: Unknown: DD180050F2020101800003A44F0027A44F004243800072324100 IE: Unknown: DD06004096010104 IE: Unknown: DD050040960305 IE: Unknown: DD050040960B69 IE: Unknown: DD050040961409 IE: Unknown: DD16000B85F800015AA6AA0F1A1ABC93574E004A621EB445