ルーターを閉じると、wifiに接続できません
Ubuntu 16.04を実行しているElitebook 8570wとac3200ルーターがあります。今、私はこのセットアップで最も奇妙な問題を抱えています。ルーターに近いときは接続できませんが、遠くに行くと接続できます。接続が解除されると、自分自身を再認証するよう求められます（パスワードを再度入力します）。実験により、ルーターの+ -6メートル以内にいると接続できないことがわかっています。これは、ルーターを別の場所に移動したときにも発生するようです（したがって、干渉はありません）。また、ルーターチャネルを切り替えましたが、それでも問題は解決しませんでした（チャネル1-4-8-11を試しました）。
$ 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
そして
$ 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
接続で問題が発生したときに次の操作を行います。
$Sudo tail -f /var/log/syslog
（ループ）結果を取得します
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)
ルーターの近くにいるとラップトップが接続できなくなる原因は何ですか？
ああ、忘れる前に、この問題はWindowsでは発生しません（デュアルブート）。
名前のスペースを削除するためにSSIDが変更されたときに接続の問題が解決されたiwlwifiドライバーを使用するいくつかのケースに取り組みました。ネットワークの名前をGLADOS MAINFRAMEからGladosMainframeまたはGLADOS_MAINFRAMEなどに変更することをお勧めします。
同様に、接続性を改善しようとするいくつかのことがあります。
まず、ルーターの設定を確認します。 WPA2-AESが推奨されます。 WPAおよびWPA2混合モードではなく、TKIPでもありません。 2番目に、ルーターがN速度に対応している場合、自動20/40 MHzではなく2.4 GHz帯域で20 MHzのチャネル幅を使用すると接続性が向上する場合がありますが、N速度に影響する可能性があります。また、自動チャネル選択ではなく、1、6、または11のいずれかの固定チャネルを使用する方が幸運です。また、ルーターがN速度のみを使用するように設定されていないことを確認してください。 auto B、G、およびNが優先されます。これらの変更を行った後、ルーターを再起動します。
次に、規制区域を明示的に設定することをお勧めします。あなたのものを確認してください：
Sudo iw reg get
00を取得した場合、それは1サイズ多分すべてに適した設定です。ここであなたを見つけてください： http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2 それから一時的に設定してください：
Sudo iw reg set IS
もちろん、アイスランドでない場合は国コードに置き換えてください。永続的に設定します：
gksudo gedit /etc/default/crda
テキストエディタgeditがない場合は、nano、kate、leafpadを使用します。
最後の行を次のように変更します。
REGDOMAIN=IS
注意深く校正し、テキストエディターを保存して閉じます。
次に、Network ManagerでIPv6を無視に設定します。 http://docs.fedoraproject.org/en-US/Fedora/18/html/Installation_Guide/images/netconfig/network-connections-ipv6-ignore .png この例はイーサネット用ですが、ワイヤレスが必要です。
これらの変更が役に立たない場合は、試してください：
Sudo modprobe -r iwlwifi
Sudo modprobe iwlwifi 11n_disable=8
役立つ場合は、永続的にします。
Sudo -i
echo "options iwlwifi 11n_disable=8" >> /etc/modprobe.d/iwlwifi.conf
exit
ほぼ2年が経過していますが、まだ髪を引き抜いている場合に備えて、Ubuntu 16.04LTSでRealtek 8188ee WiFiアダプターを使用している場合、同様のWiFiパフォーマンスの低下が確認されています。 much調査の後、グーグルやさまざまなサイトのさまざまなWiFiネットワークを備えた機器での試行など、Ubuntu自体には間違いなく無線NでのWiFiのパフォーマンスが低いという結論が出ています。この問題は特定のものではありません。 IntelやRealtekにとっては、Ubuntuの問題です。デュアルブートシステムでは、まったく同じ場所にある同じWiFi上のまったく同じハードウェアで、Windows 10は正常に動作します。
Lubuntu 18.04LTSで限定的なテストを実施しましたが、同じ問題があります。
問題は次の場合に発生します....-複数のチャネルに多数のWiFiネットワークがある場合-WiFi接続がNで、チャネル幅が40MHzの場合
20MHzのチャネル幅のみを使用するようにルーターを構成すると、問題はなくなります。
Iwコマンドを使用して、Ubuntu WiFiカードに20MHzのチャネル幅を意味する「HT20」を使用するように指示できると思います。しかし、私はそれを機能させることに成功していません。
Intel WiFiカードには、Chili555で文書化されているように、ワイヤレスN（11n_disable）を完全に無効にする便利なパラメーターがあります。 Realtek WiFiカードはサポートしていません-可能な場合、ルーターで40MHzを無効にする必要がありました。すべてのルーターがワイヤレスN規格に準拠しているわけではなく、40MHzのチャネル幅を無効にするオプションが利用できる場合とできない場合があります。
同じシステム上のワイヤレスGでのパフォーマンスは良好です。
私は専門家ではありませんが、20MHz対40MHzについての私の理解は、20MHzはシングルバンド通信を意味し、40MHzは2バンド通信を意味するということです。後者は、WiFi接続が実際に2つのWiFi帯域を使用して300Mbpsスループットを達成していることを意味します。
これが役に立つことを願っています。