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Accepted
Thijser
Asked: 2017-01-29 02:05:30 +0800 CST

关闭到路由器时无法连接wifi

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我有一台运行 ubuntu 16.04 的 Elitebook 8570w 和一台 ac3200 路由器。现在我遇到了这个设置最特殊的问题：当我靠近路由器时，我无法连接它，但当我走得更远时，我可以连接。当它断开连接时，它要求我重新验证自己（再次填写密码）。实验表明，当我在路由器 +-6 米范围内时，我无法连接。当我将路由器移动到另一个位置时，这似乎也会发生（所以它不是干扰）。我还切换了路由器通道，但这也没有解决问题（尝试了通道 1-4-8-11）。

$ sudo lshw -C network
  *-network               
       description: Ethernet interface
       product: 82579LM Gigabit Network Connection
       vendor: Intel Corporation
       physical id: 19
       bus info: pci@0000:00:19.0
       logical name: enp0s25
       version: 04
       serial: a4:5d:36:9b:ab:c3
       size: 1Gbit/s
       capacity: 1Gbit/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=3.2.6-k duplex=full firmware=0.15-4 ip=192.168.0.171 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
       resources: irq:31 memory:d9400000-d941ffff memory:d943b000-d943bfff ioport:5040(size=32)
  *-network
       description: Wireless interface
       product: Centrino Ultimate-N 6300
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:25:00.0
       logical name: wlo1
       version: 3e
       serial: 3c:a9:f4:7a:35:f0
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=4.4.0-59-generic firmware=9.221.4.1 build 25532 latency=0 link=no multicast=yes wireless=IEEE 802.11abgn
       resources: irq:33 memory:d9100000-d9101fff

和

$ lspci -vnn 
00:00.0 Host bridge [0600]: Intel Corporation 3rd Gen Core processor DRAM Controller [8086:0154] (rev 09)
    Subsystem: Hewlett-Packard Company 3rd Gen Core processor DRAM Controller [103c:176b]
    Flags: bus master, fast devsel, latency 0
    Capabilities: <access denied>
    Kernel driver in use: ivb_uncore

00:01.0 PCI bridge [0604]: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor PCI Express Root Port [8086:0151] (rev 09) (prog-if 00 [Normal decode])
    Flags: bus master, fast devsel, latency 0, IRQ 24
    Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
    I/O behind bridge: 00004000-00004fff
    Memory behind bridge: d8000000-d90fffff
    Prefetchable memory behind bridge: 00000000c0000000-00000000d1ffffff
    Capabilities: <access denied>
    Kernel driver in use: pcieport
    Kernel modules: shpchp

00:14.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller [8086:1e31] (rev 04) (prog-if 30 [XHCI])
    Subsystem: Hewlett-Packard Company 7 Series/C210 Series Chipset Family USB xHCI Host Controller [103c:176b]
    Flags: bus master, medium devsel, latency 0, IRQ 29
    Memory at d9420000 (64-bit, non-prefetchable) [size=64K]
    Capabilities: <access denied>
    Kernel driver in use: xhci_hcd

00:16.0 Communication controller [0780]: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 [8086:1e3a] (rev 04)
    Subsystem: Hewlett-Packard Company 7 Series/C210 Series Chipset Family MEI Controller [103c:176b]
    Flags: bus master, fast devsel, latency 0, IRQ 32
    Memory at d9435000 (64-bit, non-prefetchable) [size=16]
    Capabilities: <access denied>
    Kernel driver in use: mei_me
    Kernel modules: mei_me

00:19.0 Ethernet controller [0200]: Intel Corporation 82579LM Gigabit Network Connection [8086:1502] (rev 04)
    Subsystem: Hewlett-Packard Company 82579LM Gigabit Network Connection [103c:176b]
    Flags: bus master, fast devsel, latency 0, IRQ 31
    Memory at d9400000 (32-bit, non-prefetchable) [size=128K]
    Memory at d943b000 (32-bit, non-prefetchable) [size=4K]
    I/O ports at 5040 [size=32]
    Capabilities: <access denied>
    Kernel driver in use: e1000e
    Kernel modules: e1000e

00:1a.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 [8086:1e2d] (rev 04) (prog-if 20 [EHCI])
    Subsystem: Hewlett-Packard Company 7 Series/C210 Series Chipset Family USB Enhanced Host Controller [103c:176b]
    Flags: bus master, medium devsel, latency 0, IRQ 16
    Memory at d943a000 (32-bit, non-prefetchable) [size=1K]
    Capabilities: <access denied>
    Kernel driver in use: ehci-pci

00:1b.0 Audio device [0403]: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller [8086:1e20] (rev 04)
    Subsystem: Hewlett-Packard Company 7 Series/C210 Series Chipset Family High Definition Audio Controller [103c:176b]
    Flags: bus master, fast devsel, latency 0, IRQ 34
    Memory at d9430000 (64-bit, non-prefetchable) [size=16K]
    Capabilities: <access denied>
    Kernel driver in use: snd_hda_intel
    Kernel modules: snd_hda_intel

00:1c.0 PCI bridge [0604]: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 1 [8086:1e10] (rev c4) (prog-if 00 [Normal decode])
    Flags: bus master, fast devsel, latency 0, IRQ 25
    Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
    Memory behind bridge: d9300000-d93fffff
    Capabilities: <access denied>
    Kernel driver in use: pcieport
    Kernel modules: shpchp

00:1c.1 PCI bridge [0604]: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 2 [8086:1e12] (rev c4) (prog-if 00 [Normal decode])
    Flags: bus master, fast devsel, latency 0, IRQ 26
    Bus: primary=00, secondary=03, subordinate=23, sec-latency=0
    I/O behind bridge: 00002000-00003fff
    Memory behind bridge: d4000000-d7ffffff
    Prefetchable memory behind bridge: 00000000d2000000-00000000d21fffff
    Capabilities: <access denied>
    Kernel driver in use: pcieport
    Kernel modules: shpchp

00:1c.2 PCI bridge [0604]: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 3 [8086:1e14] (rev c4) (prog-if 00 [Normal decode])
    Flags: bus master, fast devsel, latency 0, IRQ 27
    Bus: primary=00, secondary=24, subordinate=24, sec-latency=0
    Memory behind bridge: d9200000-d92fffff
    Capabilities: <access denied>
    Kernel driver in use: pcieport
    Kernel modules: shpchp

00:1c.3 PCI bridge [0604]: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 4 [8086:1e16] (rev c4) (prog-if 00 [Normal decode])
    Flags: bus master, fast devsel, latency 0, IRQ 28
    Bus: primary=00, secondary=25, subordinate=25, sec-latency=0
    Memory behind bridge: d9100000-d91fffff
    Capabilities: <access denied>
    Kernel driver in use: pcieport
    Kernel modules: shpchp

00:1d.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 [8086:1e26] (rev 04) (prog-if 20 [EHCI])
    Subsystem: Hewlett-Packard Company 7 Series/C210 Series Chipset Family USB Enhanced Host Controller [103c:176b]
    Flags: bus master, medium devsel, latency 0, IRQ 16
    Memory at d9439000 (32-bit, non-prefetchable) [size=1K]
    Capabilities: <access denied>
    Kernel driver in use: ehci-pci

00:1f.0 ISA bridge [0601]: Intel Corporation QM77 Express Chipset LPC Controller [8086:1e55] (rev 04)
    Subsystem: Hewlett-Packard Company QM77 Express Chipset LPC Controller [103c:176b]
    Flags: bus master, medium devsel, latency 0
    Capabilities: <access denied>
    Kernel driver in use: lpc_ich
    Kernel modules: lpc_ich

00:1f.2 RAID bus controller [0104]: Intel Corporation 82801 Mobile SATA Controller [RAID mode] [8086:282a] (rev 04)
    Subsystem: Hewlett-Packard Company 82801 Mobile SATA Controller [RAID mode] [103c:176b]
    Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 30
    I/O ports at 5068 [size=8]
    I/O ports at 5074 [size=4]
    I/O ports at 5060 [size=8]
    I/O ports at 5070 [size=4]
    I/O ports at 5020 [size=32]
    Memory at d9438000 (32-bit, non-prefetchable) [size=2K]
    Capabilities: <access denied>
    Kernel driver in use: ahci
    Kernel modules: ahci

00:1f.3 SMBus [0c05]: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller [8086:1e22] (rev 04)
    Subsystem: Hewlett-Packard Company 7 Series/C210 Series Chipset Family SMBus Controller [103c:176b]
    Flags: medium devsel, IRQ 10
    Memory at d9434000 (64-bit, non-prefetchable) [size=256]
    I/O ports at ef80 [size=32]
    Kernel modules: i2c_i801

01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK107GLM [Quadro K1000M] [10de:0ffc] (rev a1) (prog-if 00 [VGA controller])
    DeviceName: 0
    Subsystem: Hewlett-Packard Company GK107GLM [Quadro K1000M] [103c:176b]
    Flags: bus master, fast devsel, latency 0, IRQ 35
    Memory at d8000000 (32-bit, non-prefetchable) [size=16M]
    Memory at c0000000 (64-bit, prefetchable) [size=256M]
    Memory at d0000000 (64-bit, prefetchable) [size=32M]
    I/O ports at 4000 [size=128]
    [virtual] Expansion ROM at d9080000 [disabled] [size=512K]
    Capabilities: <access denied>
    Kernel driver in use: nvidia
    Kernel modules: nvidiafb, nouveau, nvidia_367, nvidia_367_drm

01:00.1 Audio device [0403]: NVIDIA Corporation GK107 HDMI Audio Controller [10de:0e1b] (rev a1)
    Subsystem: Hewlett-Packard Company GK107 HDMI Audio Controller [103c:176b]
    Flags: bus master, fast devsel, latency 0, IRQ 17
    Memory at d9000000 (32-bit, non-prefetchable) [size=16K]
    Capabilities: <access denied>
    Kernel driver in use: snd_hda_intel
    Kernel modules: snd_hda_intel

24:00.0 FireWire (IEEE 1394) [0c00]: JMicron Technology Corp. IEEE 1394 Host Controller [197b:2380] (rev 30) (prog-if 10 [OHCI])
    Subsystem: Hewlett-Packard Company IEEE 1394 Host Controller [103c:176b]
    Flags: bus master, fast devsel, latency 0, IRQ 18
    Memory at d9200000 (32-bit, non-prefetchable) [size=2K]
    Memory at d9205000 (32-bit, non-prefetchable) [size=256]
    Capabilities: <access denied>
    Kernel driver in use: firewire_ohci
    Kernel modules: firewire_ohci

24:00.1 System peripheral [0880]: JMicron Technology Corp. SD/MMC Host Controller [197b:2392] (rev 30)
    Subsystem: Hewlett-Packard Company SD/MMC Host Controller [103c:176b]
    Flags: bus master, fast devsel, latency 0, IRQ 18
    Memory at d9204000 (32-bit, non-prefetchable) [size=256]
    Expansion ROM at d9208000 [disabled] [size=32K]
    Capabilities: <access denied>
    Kernel driver in use: sdhci-pci
    Kernel modules: sdhci_pci

24:00.2 SD Host controller [0805]: JMicron Technology Corp. Standard SD Host Controller [197b:2391] (rev 30) (prog-if 01)
    Subsystem: Hewlett-Packard Company Standard SD Host Controller [103c:176b]
    Flags: fast devsel, IRQ 18
    Memory at d9203000 (32-bit, non-prefetchable) [size=256]
    Capabilities: <access denied>
    Kernel modules: sdhci_pci

25:00.0 Network controller [0280]: Intel Corporation Centrino Ultimate-N 6300 [8086:422b] (rev 3e)
    DeviceName: WLAN
    Subsystem: Intel Corporation Centrino Ultimate-N 6300 3x3 AGN [8086:1101]
    Flags: bus master, fast devsel, latency 0, IRQ 33
    Memory at d9100000 (64-bit, non-prefetchable) [size=8K]
    Capabilities: <access denied>
    Kernel driver in use: iwlwifi
    Kernel modules: iwlwifi

当我遇到连接问题时，请执行以下操作：

$sudo tail -f /var/log/syslog

我得到（循环）结果

Jan 28 11:55:06 AICORE-reboot dhclient[9232]: DHCPDISCOVER on wlo1 to 255.255.255.255 port 67 interval 3 (xid=0x59a3635c)
Jan 28 11:55:09 AICORE-reboot dhclient[9232]: DHCPDISCOVER on wlo1 to 255.255.255.255 port 67 interval 5 (xid=0x59a3635c)
Jan 28 11:55:14 AICORE-reboot dhclient[9232]: DHCPDISCOVER on wlo1 to 255.255.255.255 port 67 interval 12 (xid=0x59a3635c)
Jan 28 11:55:26 AICORE-reboot dhclient[9232]: DHCPDISCOVER on wlo1 to 255.255.255.255 port 67 interval 8 (xid=0x59a3635c)
Jan 28 11:55:34 AICORE-reboot dhclient[9232]: DHCPDISCOVER on wlo1 to 255.255.255.255 port 67 interval 7 (xid=0x59a3635c)
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <warn>  [1485600938.3017] dhcp4 (wlo1): request timed out
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <info>  [1485600938.3018] dhcp4 (wlo1): state changed unknown -> timeout
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <info>  [1485600938.3182] dhcp4 (wlo1): canceled DHCP transaction, DHCP client pid 9232
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <info>  [1485600938.3183] dhcp4 (wlo1): state changed timeout -> done
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <info>  [1485600938.3188] device (wlo1): state change: ip-config -> failed (reason 'ip-config-unavailable') [70 120 5]
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <info>  [1485600938.3192] manager: NetworkManager state is now DISCONNECTED
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <warn>  [1485600938.3201] device (wlo1): Activation: failed for connection 'GLADOS MAINFRAME'
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <info>  [1485600938.3214] device (wlo1): state change: failed -> disconnected (reason 'none') [120 30 0]
Jan 28 11:55:38 AICORE-reboot avahi-daemon[1134]: Withdrawing address record for fe80::99ad:80fc:78c3:6eaf on wlo1.
Jan 28 11:55:38 AICORE-reboot avahi-daemon[1134]: Leaving mDNS multicast group on interface wlo1.IPv6 with address fe80::99ad:80fc:78c3:6eaf.
Jan 28 11:55:38 AICORE-reboot avahi-daemon[1134]: Interface wlo1.IPv6 no longer relevant for mDNS.
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <info>  [1485600938.3258] policy: auto-activating connection 'GLADOS MAINFRAME'
Jan 28 11:55:38 AICORE-reboot kernel: [15223.206329] wlo1: deauthenticating from 54:b8:0a:37:35:2e by local choice (Reason: 3=DEAUTH_LEAVING)
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <info>  [1485600938.3317] device (wlo1): Activation: starting connection 'GLADOS MAINFRAME' (dcb05d08-526f-4777-a602-3eb925aa2152)
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <info>  [1485600938.3320] device (wlo1): state change: disconnected -> prepare (reason 'none') [30 40 0]
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <info>  [1485600938.3322] manager: NetworkManager state is now CONNECTING
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <info>  [1485600938.3331] device (wlo1): state change: prepare -> config (reason 'none') [40 50 0]
Jan 28 11:55:38 AICORE-reboot wpa_supplicant[1384]: wlo1: CTRL-EVENT-DISCONNECTED bssid=54:b8:0a:37:35:2e reason=3 locally_generated=1
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <info>  [1485600938.3356] device (wlo1): Activation: (wifi) access point 'GLADOS MAINFRAME' has security, but secrets are required.
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <info>  [1485600938.3356] device (wlo1): state change: config -> need-auth (reason 'none') [50 60 0]
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <warn>  [1485600938.3377] sup-iface[0xc52a10,wlo1]: connection disconnected (reason -3)
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <info>  [1485600938.3378] device (wlo1): supplicant interface state: completed -> disconnected
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <info>  [1485600938.3402] device (wlo1): state change: need-auth -> prepare (reason 'none') [60 40 0]
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <info>  [1485600938.3407] device (wlo1): state change: prepare -> config (reason 'none') [40 50 0]
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <info>  [1485600938.3409] device (wlo1): Activation: (wifi) connection 'GLADOS MAINFRAME' has security, and secrets exist.  No new secrets needed.
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <info>  [1485600938.3409] Config: added 'ssid' value 'GLADOS MAINFRAME'
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <info>  [1485600938.3409] Config: added 'scan_ssid' value '1'
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <info>  [1485600938.3409] Config: added 'key_mgmt' value 'WPA-PSK'
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <info>  [1485600938.3409] Config: added 'auth_alg' value 'OPEN'
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <info>  [1485600938.3410] Config: added 'psk' value '<omitted>'
Jan 28 11:55:38 AICORE-reboot wpa_supplicant[1384]: wlo1: CTRL-EVENT-REGDOM-CHANGE init=CORE type=WORLD
Jan 28 11:55:38 AICORE-reboot kernel: [15223.223973] cfg80211: World regulatory domain updated:
Jan 28 11:55:38 AICORE-reboot kernel: [15223.223978] cfg80211:  DFS Master region: unset
Jan 28 11:55:38 AICORE-reboot kernel: [15223.223980] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
Jan 28 11:55:38 AICORE-reboot kernel: [15223.223984] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
Jan 28 11:55:38 AICORE-reboot kernel: [15223.223987] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
Jan 28 11:55:38 AICORE-reboot kernel: [15223.223990] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm), (N/A)
Jan 28 11:55:38 AICORE-reboot kernel: [15223.223994] cfg80211:   (5170000 KHz - 5250000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (N/A)
Jan 28 11:55:38 AICORE-reboot kernel: [15223.223998] cfg80211:   (5250000 KHz - 5330000 KHz @ 80000 KHz, 160000 KHz AUTO), (N/A, 2000 mBm), (0 s)
Jan 28 11:55:38 AICORE-reboot kernel: [15223.224001] cfg80211:   (5490000 KHz - 5730000 KHz @ 160000 KHz), (N/A, 2000 mBm), (0 s)
Jan 28 11:55:38 AICORE-reboot kernel: [15223.224004] cfg80211:   (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A)
Jan 28 11:55:38 AICORE-reboot kernel: [15223.224007] cfg80211:   (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A)
Jan 28 11:55:38 AICORE-reboot NetworkManager[1189]: <info>  [1485600938.3454] sup-iface[0xc52a10,wlo1]: config: set interface ap_scan to 1
Jan 28 11:55:41 AICORE-reboot wpa_supplicant[1384]: wlo1: SME: Trying to authenticate with 54:b8:0a:37:35:2e (SSID='GLADOS MAINFRAME' freq=5500 MHz)
Jan 28 11:55:41 AICORE-reboot kernel: [15226.240577] wlo1: authenticate with 54:b8:0a:37:35:2e
Jan 28 11:55:41 AICORE-reboot kernel: [15226.242927] wlo1: send auth to 54:b8:0a:37:35:2e (try 1/3)
Jan 28 11:55:41 AICORE-reboot NetworkManager[1189]: <info>  [1485600941.3763] device (wlo1): supplicant interface state: disconnected -> authenticating
Jan 28 11:55:41 AICORE-reboot wpa_supplicant[1384]: wlo1: Trying to associate with 54:b8:0a:37:35:2e (SSID='GLADOS MAINFRAME' freq=5500 MHz)
Jan 28 11:55:41 AICORE-reboot kernel: [15226.327692] wlo1: authenticated
Jan 28 11:55:41 AICORE-reboot kernel: [15226.328244] wlo1: associate with 54:b8:0a:37:35:2e (try 1/3)
Jan 28 11:55:41 AICORE-reboot kernel: [15226.329249] wlo1: RX AssocResp from 54:b8:0a:37:35:2e (capab=0x11 status=0 aid=1)
Jan 28 11:55:41 AICORE-reboot wpa_supplicant[1384]: wlo1: Associated with 54:b8:0a:37:35:2e
Jan 28 11:55:41 AICORE-reboot NetworkManager[1189]: <info>  [1485600941.4522] device (wlo1): supplicant interface state: authenticating -> associated
Jan 28 11:55:41 AICORE-reboot kernel: [15226.332641] wlo1: associated
Jan 28 11:55:41 AICORE-reboot NetworkManager[1189]: <info>  [1485600941.4724] device (wlo1): supplicant interface state: associated -> 4-way handshake
Jan 28 11:55:41 AICORE-reboot wpa_supplicant[1384]: wlo1: WPA: Key negotiation completed with 54:b8:0a:37:35:2e [PTK=CCMP GTK=TKIP]
Jan 28 11:55:41 AICORE-reboot wpa_supplicant[1384]: wlo1: CTRL-EVENT-CONNECTED - Connection to 54:b8:0a:37:35:2e completed [id=0 id_str=]
Jan 28 11:55:41 AICORE-reboot NetworkManager[1189]: <info>  [1485600941.5562] device (wlo1): supplicant interface state: 4-way handshake -> completed
Jan 28 11:55:41 AICORE-reboot NetworkManager[1189]: <info>  [1485600941.5563] device (wlo1): Activation: (wifi) Stage 2 of 5 (Device Configure) successful.  Connected to wireless network 'GLADOS MAINFRAME'.
Jan 28 11:55:41 AICORE-reboot NetworkManager[1189]: <info>  [1485600941.5564] device (wlo1): state change: config -> ip-config (reason 'none') [50 70 0]
Jan 28 11:55:41 AICORE-reboot NetworkManager[1189]: <info>  [1485600941.5568] dhcp4 (wlo1): activation: beginning transaction (timeout in 45 seconds)
Jan 28 11:55:41 AICORE-reboot NetworkManager[1189]: <info>  [1485600941.5583] dhcp4 (wlo1): dhclient started with pid 9248
Jan 28 11:55:41 AICORE-reboot dhclient[9248]: DHCPREQUEST of 192.168.0.108 on wlo1 to 255.255.255.255 port 67 (xid=0x44238e25)
Jan 28 11:55:43 AICORE-reboot avahi-daemon[1134]: Joining mDNS multicast group on interface wlo1.IPv6 with address fe80::99ad:80fc:78c3:6eaf.
Jan 28 11:55:43 AICORE-reboot avahi-daemon[1134]: New relevant interface wlo1.IPv6 for mDNS.
Jan 28 11:55:43 AICORE-reboot avahi-daemon[1134]: Registering new address record for fe80::99ad:80fc:78c3:6eaf on wlo1.*.
Jan 28 11:55:44 AICORE-reboot dhclient[9248]: DHCPREQUEST of 192.168.0.108 on wlo1 to 255.255.255.255 port 67 (xid=0x44238e25)

有人知道是什么导致我的笔记本电脑靠近路由器时无法连接吗？

哦，在我忘记之前，Windows 中不会出现问题（双启动）。

networking

2 个回答

  1. Best Answer

    我已经处理了几个使用iwlwifi驱动程序的案例，当更改 SSID 以消除名称中的空格时，连接问题得到了帮助。我建议您将网络名称从 GLADOS MAINFRAME 更改为 GladosMainframe 或 GLADOS_MAINFRAME 或类似名称。

    同样，您可能会尝试一些事情来改善连接性。

    首先，检查路由器中的设置。首选 WPA2-AES；不是任何 WPA 和 WPA2 混合模式，当然也不是 TKIP。其次，如果您的路由器能够实现 N 速度，您可能会在 2.4 GHz 频段中使用 20 MHz 的通道宽度而不是自动 20/40 MHz 获得更好的连接性，尽管它可能会影响 N 速度。固定频道（1、6 或 11）比自动频道选择要好。此外，请确保路由器未设置为仅使用 N 速度；自动 B、G 和 N 是首选。进行这些更改后，重新启动路由器。

    接下来，我建议明确设置您的监管域。检查你的：

    sudo iw reg get

    如果你得到 00，那是一个千篇一律的设置。在这里找到你的：http ://en.wikipedia.org/wiki/ISO_3166-1_alpha-2然后临时设置它：

    sudo iw reg set IS

    当然，如果不是冰岛，请替换您的国家/地区代码。永久设置：

    gksudo gedit /etc/default/crda

    如果您没有文本编辑器 gedit，请使用 nano、kate 或 leafpad。

    将最后一行更改为：

    REGDOMAIN=IS

    仔细校对，保存并关闭文本编辑器。

    接下来，我在网络管理器中将 IPv6 设置为 Ignore：http://docs.fedoraproject.org/en-US/Fedora/18/html/Installation_Guide/images/netconfig/network-connections-ipv6-ignore.png 这个例子用于以太网，但您想要无线。

    如果这些更改没有帮助，请尝试：

    sudo modprobe -r iwlwifi
sudo modprobe iwlwifi 11n_disable=8

    如果有帮助，请将其永久化：

    sudo -i
echo "options iwlwifi 11n_disable=8"  >>  /etc/modprobe.d/iwlwifi.conf
exit
    • 5

  2. 已经快两年了，但以防万一您仍然不满意，我确认我在使用 Realtek 8188ee WiFi 适配器的 Ubuntu 16.04LTS 上也看到过类似的糟糕 WiFi 性能。经过大量研究，包括谷歌搜索和在不同站点使用不同 WiFi 网络的设备进行试验，我得出结论，Ubuntu 本身肯定存在问题，无线 N 上的 WiFi 性能不佳。这个问题不是英特尔或 Realtek 特有的，而是一个 Ubuntu 问题。在双启动系统上，在完全相同的硬件上、在完全相同的位置、在完全相同的 WiFi 上，Windows 10 可以正常工作。

    我在 Lubuntu 18.04LTS 上做了有限的测试，它也有同样的问题。

    问题发生在...... - 您附近有很多 WiFi 网络在多个频道上 - 您的 WiFi 连接为 N，频道宽度为 40MHz

    如果您将路由器配置为仅使用 20MHz 信道宽度，问题就会消失。

    我相信 iw 命令可以用来告诉你的 Ubuntu WiFi 卡使用“HT20”，这意味着 20MHz 通道宽度。但我还没有成功地让它工作。

    英特尔 WiFi 卡有一个方便的参数来完全禁用无线 N (11n_disable)，如 Chili555 所述。Realtek WiFi 卡没有 - 所以我们必须尽可能在路由器中禁用 40MHz。并非所有路由器都符合无线 N 标准，禁用 40MHz 信道宽度的选项可能可用也可能不可用。

    相同系统上的无线 G 性能良好。

    我不是专家，但我对 20MHz 与 40MHz 的理解是，20MHz 表示单频段通信，40MHz 表示两频段通信。后者意味着您的 WiFi 连接实际上是使用两个 WiFi 频段来实现 300Mbps 的吞吐量。

    希望这有点用。

    • 0

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