我知道这个问题之前已经讨论过很多次了，但不幸的是我无法从之前讨论的许多帖子中解决我的问题。自从我开始使用 Ubuntu 16.04 以来已经一个月了。我将其与 Windows 双启动（虽然我不再使用 Windows）。当我距离我的 wifi 路由器 2-3 米时，我收到良好的信号，但是当我超过这个距离时，信号会减弱并很快断开连接。虽然我在 Windows 上收到良好的信号。这现在真的很成问题，因为我必须在大学使用互联网，但不能这样做。以下是以下命令的摘要。
lspci -nnk | grep -iA2 net
lsusb
lsmod
iwconfig
ifconfig -a
sudo iwlist scan
我已经执行了更新内核、iwconfig 关闭电源以及许多其他我不记得的技巧，但它不起作用。
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.1 LTS
Release: 16.04
Codename: xenial
uname -a
Linux curiosity-HP-1000-Notebook-PC 4.4.24-040424-generic #201610071138 SMP Fri Oct 7 15:39:35 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
sudo lshw-类网络
*-network
description: Wireless interface
product: Ralink corp.
vendor: Ralink corp.
physical id: 0
bus info: pci@0000:01:00.0
logical name: wlo1
version: 00
serial: a4:17:31:a5:57:e8
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=rt2800pci driverversion=4.4.24-040424-generic firmware=0.34 ip=192.168.0.10 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn
resources: irq:16 memory:c2500000-c250ffff
*-network UNCLAIMED
description: Ethernet controller
product: RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:08:00.0
version: 05
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list
configuration: latency=0
resources: ioport:2000(size=256) memory:c2404000-c2404fff memory:c2400000-c2403fff
请参阅lspci-nnk| grep -iA2 净
输出：
01:00.0 Network controller [0280]: Ralink corp. Device [1814:539a]
DeviceName: Ralink RT5390R 802.11b/g/n 1x1 Wi-Fi Adapter
Subsystem: Hewlett-Packard Company Device [103c:1839]
--
08:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller [10ec:8136] (rev 05)
DeviceName: Hanksville 10/100 Lan Connection
Subsystem: Hewlett-Packard Company RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller [103c:1854]
Kernel modules: ndiswrapper
> lsusb
输出：
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
修改
输出
Module Size Used by
msr 16384 0
drbg 32768 1
ansi_cprng 16384 0
ctr 16384 1
ccm 20480 1
wl 6365184 0
arc4 16384 2
rt2800pci 16384 0
rt2800mmio 20480 1 rt2800pci
rt2800lib 94208 2 rt2800pci,rt2800mmio
rt2x00pci 16384 1 rt2800pci
rt2x00mmio 16384 2 rt2800pci,rt2800mmio
rt2x00lib 57344 5 rt2x00pci,rt2800lib,rt2800pci,rt2800mmio,rt2x00mmio
mac80211 737280 3 rt2x00lib,rt2x00pci,rt2800lib
snd_hda_codec_hdmi 53248 1
snd_hda_codec_realtek 86016 1
snd_hda_codec_generic 77824 1 snd_hda_codec_realtek
snd_hda_intel 36864 5
cfg80211 565248 3 wl,mac80211,rt2x00lib
snd_hda_codec 135168 4 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_intel
snd_hda_core 65536 5 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel
snd_hwdep 16384 1 snd_hda_codec
eeprom_93cx6 16384 1 rt2800pci
intel_rapl 20480 0
snd_pcm 106496 5 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_core
snd_seq_midi 16384 0
crc_ccitt 16384 1 rt2800lib
snd_seq_midi_event 16384 1 snd_seq_midi
snd_rawmidi 32768 1 snd_seq_midi
snd_seq 69632 2 snd_seq_midi_event,snd_seq_midi
x86_pkg_temp_thermal 16384 0
snd_seq_device 16384 3 snd_seq,snd_rawmidi,snd_seq_midi
intel_powerclamp 16384 0
snd_timer 32768 2 snd_pcm,snd_seq
coretemp 16384 0
snd 81920 20 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,snd_seq_device
soundcore 16384 1 snd
rtsx_pci_ms 20480 0
kvm_intel 172032 0
kvm 536576 1 kvm_intel
irqbypass 16384 1 kvm
ndiswrapper 286720 0
crct10dif_pclmul 16384 0
crc32_pclmul 16384 0
memstick 20480 1 rtsx_pci_ms
hp_wmi 16384 0
sparse_keymap 16384 1 hp_wmi
mei_me 32768 0
joydev 20480 0
input_leds 16384 0
serio_raw 16384 0
mei 98304 1 mei_me
cryptd 20480 0
lpc_ich 24576 0
shpchp 36864 0
hp_wireless 16384 0
mac_hid 16384 0
parport_pc 32768 0
ppdev 20480 0
lp 20480 0
parport 49152 3 lp,ppdev,parport_pc
autofs4 40960 2
i915 1208320 4
rtsx_pci_sdmmc 24576 0
i2c_algo_bit 16384 1 i915
drm_kms_helper 135168 1 i915
syscopyarea 16384 1 drm_kms_helper
sysfillrect 16384 1 drm_kms_helper
sysimgblt 16384 1 drm_kms_helper
psmouse 126976 0
fb_sys_fops 16384 1 drm_kms_helper
drm 360448 6 i915,drm_kms_helper
ahci 36864 3
rtsx_pci 53248 2 rtsx_pci_ms,rtsx_pci_sdmmc
libahci 32768 1 ahci
wmi 20480 1 hp_wmi
video 40960 1 i915
fjes 28672 0
系统配置
输出：
lo no wireless extensions.
wlo1 IEEE 802.11bgn ESSID:"UPC6350189"
Mode:Managed Frequency:2.437 GHz Access Point: 08:95:2A:88:86:70
Bit Rate=65 Mb/s Tx-Power=20 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=67/70 Signal level=-43 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:103 Invalid misc:221 Missed beacon:0
配置文件
输出：
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:3825 errors:0 dropped:0 overruns:0 frame:0
TX packets:3825 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:372512 (372.5 KB) TX bytes:372512 (372.5 KB)
wlo1 Link encap:Ethernet HWaddr a4:17:31:a5:57:e8
inet addr:192.168.0.10 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: 2a02:908:d80:1c20::7/128 Scope:Global
inet6 addr: 2a02:908:d80:1c20:52f0:ead9:762c:95cc/64 Scope:Global
inet6 addr: 2a02:908:d80:1c20:3c71:9e73:517f:1ce/64 Scope:Global
inet6 addr: fe80::13d4:18b8:8661:b0d8/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:36747 errors:0 dropped:0 overruns:0 frame:0
TX packets:29816 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:31948945 (31.9 MB) TX bytes:4370093 (4.3 MB)
grep -i 黑名单 /etc/modprobe.d/blacklist.conf
输出
blacklist evbug
blacklist usbmouse
blacklist usbkbd
blacklist eepro100
blacklist de4x5
blacklist eth1394
blacklist snd_intel8x0m
blacklist snd_aw2
blacklist i2c_i801
blacklist prism54
blacklist bcm43xx
blacklist garmin_gps
blacklist asus_acpi
blacklist snd_pcsp
blacklist pcspkr
# from being initialised (Ubuntu: #297750). Blacklist so that the driver
sudo iwlist 扫描
输出：
lo Interface doesn't support scanning.
wlo1 Scan completed :
Cell 01 - Address: 08:95:2A:88:86:70
Channel:6
Frequency:2.437 GHz (Channel 6)
Quality=67/70 Signal level=-43 dBm
Encryption key:on
ESSID:"UPC6350189"
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=000000042eac449f
Extra: Last beacon: 88ms ago
IE: Unknown: 000A55504336333530313839
IE: Unknown: 010882848B962430486C
IE: Unknown: 030106
IE: Unknown: 2A0100
IE: Unknown: 2F0100
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
IE: Unknown: 32040C121860
IE: Unknown: 0B0501002F0000
IE: Unknown: 2D1A3C191BFFFF000000000000000000000000000000000000000000
IE: Unknown: 3D1606081100000000000000000000000000000000000000
IE: Unknown: 7F080400080000000040
IE: Unknown: DD090010180201000C0000
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
IE: Unknown: DD180050F2020101840003A4000027A4000042435E0062322F00
IE: Unknown: 46057208010000
Cell 02 - Address: 08:95:2A:88:24:C9
Channel:1
Frequency:2.412 GHz (Channel 1)
Quality=63/70 Signal level=-47 dBm
Encryption key:on
ESSID:"UPC6405478"
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=00000017f54a5d8f
Extra: Last beacon: 88ms ago
IE: Unknown: 000A55504336343035343738
IE: Unknown: 010882848B962430486C
IE: Unknown: 030101
IE: Unknown: 2A0100
IE: Unknown: 2F0100
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : TKIP
Pairwise Ciphers (2) : CCMP TKIP
Authentication Suites (1) : PSK
IE: Unknown: 32040C121860
IE: Unknown: 0B0501002E0000
IE: Unknown: ....................................
答案1
首先，RTL8101 设备是以太网设备，不是无线设备。您显然尝试过让 ndiswrapper 为您的以太网设备工作，但没有成功。我建议您将其删除：
sudo apt purge ndiswrapper
sudo rm -r /etc/ndiswrapper/*
sudo rm /etc/modprobe.d/ndiswrapper.conf
接下来，你显然试图安装 Broadcom 驱动程序，韦，对于您的 Realtek 设备；让我们也将其删除：
sudo apt purge bcmwl-kernel-source
接下来，让我们尝试一个驱动程序参数，看看是否可以改善连接性：
sudo -i
echo "options cfg80211 cfg80211_disable_40mhz_24ghz=Y" > /etc/modprobe.d/cfg80211.conf
exit
然后明确设置你的监管区域。检查你的：
sudo iw reg get
如果您选择 00，则这是一个通用的设置。请在此处查找您的设置：http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2然后暂时设置一下：
sudo iw reg set IS
当然，如果不是冰岛，请替换您的国家代码。永久设置它：
gksudo gedit /etc/default/crda
如果您没有文本编辑器 gedit，请使用 nano 或 Kate 或 leafpad。
将最后一行改为：
REGDOMAIN=IS
仔细校对，保存并关闭文本编辑器。
完成这些更改后，重新启动并测试。