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Пишет Русскоязычное Linux-сообщество ([info]lj_ru_linux)
@ 2012-10-07 19:13:00
Previous Entry  Add to memories!  Tell a Friend!  Next Entry
Wi-Fi несовместимость между ноутбуком Samsung 300E5Z-A06 с Xubuntu 12.04 и роутером Asus DSL-N11
Наблюдаю странную несовместимость по Wi-Fi между ноутбуком Samsung 300E5Z-A06 с Xubuntu 12.04 и роутером Asus DSL-N11.
При этом нельзя сделать вывод, что проблема исключительно в роутере, т.к. N900 работает с ним идеально. Также нельзя грешить исключительно на ноутбук, т.к. до транспортировки на основное место использования он пару дней использовался с двумя другими точками доступа, и с ними он взаимодействовал на ура.


1) Если по-какой либо причине ноутбук отключился от Wi-Fi (например, из-за ухода suspend), то подключиться снова он уже не может, и в списке доступных Wi-Fi сетей после отключения сетей гораздо меньше, чем доступно на самом деле. Помогает перезагрузка модуля iwlwifi, так что в качестве полумеры добавил в /etc/pm/config.d/modules строку
SUSPEND_MODULES="iwlwifi"
От всех проблем это, к сожалению, не спасает.

2) Нередко Wi-Fi на ноутбуке отваливается самопроизвольно. При этом в логах вижу
[/var/log/kern.log]
Oct 7 12:52:54 olga-notebook kernel: [10901.617795] cfg80211: All devices are disconnected, going to restore regulatory settings
Oct 7 12:52:54 olga-notebook kernel: [10901.617806] cfg80211: Restoring regulatory settings
Oct 7 12:52:54 olga-notebook kernel: [10901.617819] cfg80211: Calling CRDA to update world regulatory domain
Oct 7 12:52:54 olga-notebook kernel: [10901.626229] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
Oct 7 12:52:54 olga-notebook kernel: [10901.626238] cfg80211: World regulatory domain updated:
Oct 7 12:52:54 olga-notebook kernel: [10901.626242] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
Oct 7 12:52:54 olga-notebook kernel: [10901.626249] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Oct 7 12:52:54 olga-notebook kernel: [10901.626255] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
Oct 7 12:52:54 olga-notebook kernel: [10901.626260] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
Oct 7 12:52:54 olga-notebook kernel: [10901.626265] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Oct 7 12:52:54 olga-notebook kernel: [10901.626270] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Oct 7 12:53:09 olga-notebook kernel: [10917.351375] ADDRCONF(NETDEV_UP): wlan0: link is not ready
---------------- В этот момент я перезагружаю модуль iwlwifi -----------
Oct 7 12:53:31 olga-notebook kernel: [10939.212433] iwlwifi 0000:01:00.0: PCI INT A disabled
Oct 7 12:53:31 olga-notebook kernel: [10939.240174] Intel(R) Wireless WiFi Link AGN driver for Linux, in-tree:
Oct 7 12:53:31 olga-notebook kernel: [10939.240179] Copyright(c) 2003-2011 Intel Corporation
Oct 7 12:53:31 olga-notebook kernel: [10939.240278] iwlwifi 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
Oct 7 12:53:31 olga-notebook kernel: [10939.240359] iwlwifi 0000:01:00.0: setting latency timer to 64
Oct 7 12:53:31 olga-notebook kernel: [10939.240411] iwlwifi 0000:01:00.0: pci_resource_len = 0x00002000
Oct 7 12:53:31 olga-notebook kernel: [10939.240414] iwlwifi 0000:01:00.0: pci_resource_base = ffffc90000358000
Oct 7 12:53:31 olga-notebook kernel: [10939.240417] iwlwifi 0000:01:00.0: HW Revision ID = 0x34
Oct 7 12:53:31 olga-notebook kernel: [10939.240957] iwlwifi 0000:01:00.0: irq 45 for MSI/MSI-X
Oct 7 12:53:31 olga-notebook kernel: [10939.241130] iwlwifi 0000:01:00.0: Detected Intel(R) Centrino(R) Wireless-N 130 BGN, REV=0xB0
Oct 7 12:53:31 olga-notebook kernel: [10939.241372] iwlwifi 0000:01:00.0: L1 Enabled; Disabling L0S
Oct 7 12:53:31 olga-notebook kernel: [10939.258811] iwlwifi 0000:01:00.0: device EEPROM VER=0x716, CALIB=0x6
Oct 7 12:53:31 olga-notebook kernel: [10939.258815] iwlwifi 0000:01:00.0: Device SKU: 0X150
Oct 7 12:53:31 olga-notebook kernel: [10939.258818] iwlwifi 0000:01:00.0: Valid Tx ant: 0X1, Valid Rx ant: 0X3
Oct 7 12:53:31 olga-notebook kernel: [10939.258866] iwlwifi 0000:01:00.0: Tunable channels: 13 802.11bg, 0 802.11a channels
Oct 7 12:53:31 olga-notebook kernel: [10939.264464] iwlwifi 0000:01:00.0: loaded firmware version 18.168.6.1
Oct 7 12:53:31 olga-notebook kernel: [10939.265822] Registered led device: phy1-led
Oct 7 12:53:31 olga-notebook kernel: [10939.268167] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
Oct 7 12:53:31 olga-notebook kernel: [10939.270532] ieee80211 phy1: Selected rate control algorithm 'iwl-agn-rs'
Oct 7 12:53:31 olga-notebook kernel: [10939.285941] iwlwifi 0000:01:00.0: L1 Enabled; Disabling L0S
Oct 7 12:53:31 olga-notebook kernel: [10939.292890] iwlwifi 0000:01:00.0: Radio type=0x2-0x2-0x1
Oct 7 12:53:31 olga-notebook kernel: [10939.385022] iwlwifi 0000:01:00.0: L1 Enabled; Disabling L0S
Oct 7 12:53:31 olga-notebook kernel: [10939.391945] iwlwifi 0000:01:00.0: Radio type=0x2-0x2-0x1
Oct 7 12:53:31 olga-notebook kernel: [10939.487805] ADDRCONF(NETDEV_UP): wlan0: link is not ready
Oct 7 12:53:31 olga-notebook kernel: [10939.550218] ADDRCONF(NETDEV_UP): wlan0: link is not ready
Oct 7 12:53:31 olga-notebook kernel: [10939.552713] iwlwifi 0000:01:00.0: L1 Enabled; Disabling L0S
Oct 7 12:53:31 olga-notebook kernel: [10939.559700] iwlwifi 0000:01:00.0: Radio type=0x2-0x2-0x1
Oct 7 12:53:32 olga-notebook kernel: [10939.689800] ADDRCONF(NETDEV_UP): wlan0: link is not ready
Oct 7 12:53:33 olga-notebook kernel: [10941.054020] cfg80211: Found new beacon on frequency: 2472 MHz (Ch 13) on phy1
Oct 7 12:53:34 olga-notebook kernel: [10941.818675] wlan0: authenticate with 90:e6:ba:a2:e6:95 (try 1)
Oct 7 12:53:34 olga-notebook kernel: [10942.018292] wlan0: authenticate with 90:e6:ba:a2:e6:95 (try 2)
Oct 7 12:53:34 olga-notebook kernel: [10942.019833] wlan0: authenticated
Oct 7 12:53:34 olga-notebook kernel: [10942.040363] wlan0: associate with 90:e6:ba:a2:e6:95 (try 1)
Oct 7 12:53:34 olga-notebook kernel: [10942.238205] wlan0: associate with 90:e6:ba:a2:e6:95 (try 2)
Oct 7 12:53:34 olga-notebook kernel: [10942.241521] wlan0: RX AssocResp from 90:e6:ba:a2:e6:95 (capab=0x411 status=0 aid=2)
Oct 7 12:53:34 olga-notebook kernel: [10942.241526] wlan0: associated
Oct 7 12:53:34 olga-notebook kernel: [10942.245994] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
Oct 7 12:53:34 olga-notebook kernel: [10942.246077] cfg80211: Calling CRDA for country: US
Oct 7 12:53:34 olga-notebook kernel: [10942.251792] cfg80211: Updating information on frequency 2412 MHz for a 20 MHz width channel with regulatory rule:
Oct 7 12:53:34 olga-notebook kernel: [10942.251798] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
Oct 7 12:53:34 olga-notebook kernel: [10942.251802] cfg80211: Updating information on frequency 2417 MHz for a 20 MHz width channel with regulatory rule:
Oct 7 12:53:34 olga-notebook kernel: [10942.251805] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
Oct 7 12:53:34 olga-notebook kernel: [10942.251808] cfg80211: Updating information on frequency 2422 MHz for a 20 MHz width channel with regulatory rule:
Oct 7 12:53:34 olga-notebook kernel: [10942.251811] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
Oct 7 12:53:34 olga-notebook kernel: [10942.251814] cfg80211: Updating information on frequency 2427 MHz for a 20 MHz width channel with regulatory rule:
Oct 7 12:53:34 olga-notebook kernel: [10942.251817] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
Oct 7 12:53:34 olga-notebook kernel: [10942.251820] cfg80211: Updating information on frequency 2432 MHz for a 20 MHz width channel with regulatory rule:
Oct 7 12:53:34 olga-notebook kernel: [10942.251823] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
Oct 7 12:53:34 olga-notebook kernel: [10942.251826] cfg80211: Updating information on frequency 2437 MHz for a 20 MHz width channel with regulatory rule:
Oct 7 12:53:34 olga-notebook kernel: [10942.251829] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
Oct 7 12:53:34 olga-notebook kernel: [10942.251832] cfg80211: Updating information on frequency 2442 MHz for a 20 MHz width channel with regulatory rule:
Oct 7 12:53:34 olga-notebook kernel: [10942.251835] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
Oct 7 12:53:34 olga-notebook kernel: [10942.251838] cfg80211: Updating information on frequency 2447 MHz for a 20 MHz width channel with regulatory rule:
Oct 7 12:53:34 olga-notebook kernel: [10942.251841] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
Oct 7 12:53:34 olga-notebook kernel: [10942.251844] cfg80211: Updating information on frequency 2452 MHz for a 20 MHz width channel with regulatory rule:
Oct 7 12:53:34 olga-notebook kernel: [10942.251847] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
Oct 7 12:53:34 olga-notebook kernel: [10942.251850] cfg80211: Updating information on frequency 2457 MHz for a 20 MHz width channel with regulatory rule:
Oct 7 12:53:34 olga-notebook kernel: [10942.251853] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
Oct 7 12:53:34 olga-notebook kernel: [10942.251856] cfg80211: Updating information on frequency 2462 MHz for a 20 MHz width channel with regulatory rule:
Oct 7 12:53:34 olga-notebook kernel: [10942.251859] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
Oct 7 12:53:34 olga-notebook kernel: [10942.251862] cfg80211: Disabling freq 2467 MHz
Oct 7 12:53:34 olga-notebook kernel: [10942.251864] cfg80211: Disabling freq 2472 MHz
Oct 7 12:53:34 olga-notebook kernel: [10942.251867] cfg80211: Regulatory domain changed to country: US
Oct 7 12:53:34 olga-notebook kernel: [10942.251870] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
Oct 7 12:53:34 olga-notebook kernel: [10942.251873] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
Oct 7 12:53:34 olga-notebook kernel: [10942.251876] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1700 mBm)
Oct 7 12:53:34 olga-notebook kernel: [10942.251879] cfg80211: (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Oct 7 12:53:34 olga-notebook kernel: [10942.251881] cfg80211: (5490000 KHz - 5600000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Oct 7 12:53:34 olga-notebook kernel: [10942.251884] cfg80211: (5650000 KHz - 5710000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Oct 7 12:53:34 olga-notebook kernel: [10942.251887] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm)
Oct 7 12:53:37 olga-notebook kernel: [10944.740736] iwlwifi 0000:01:00.0: Tx aggregation enabled on ra = 90:e6:ba:a2:e6:95 tid = 0
Oct 7 12:53:44 olga-notebook kernel: [10952.354960] wlan0: no IPv6 routers present


3) Часто пакеты летают с существенной задержкой.
[ping -Ac 128 192.168.1.1]
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_req=1 ttl=64 time=61.1 ms
64 bytes from 192.168.1.1: icmp_req=2 ttl=64 time=70.3 ms
64 bytes from 192.168.1.1: icmp_req=3 ttl=64 time=69.3 ms
64 bytes from 192.168.1.1: icmp_req=4 ttl=64 time=73.5 ms
64 bytes from 192.168.1.1: icmp_req=5 ttl=64 time=78.7 ms
64 bytes from 192.168.1.1: icmp_req=6 ttl=64 time=82.8 ms
64 bytes from 192.168.1.1: icmp_req=7 ttl=64 time=86.8 ms
64 bytes from 192.168.1.1: icmp_req=8 ttl=64 time=90.1 ms
64 bytes from 192.168.1.1: icmp_req=9 ttl=64 time=94.9 ms
64 bytes from 192.168.1.1: icmp_req=10 ttl=64 time=100 ms
64 bytes from 192.168.1.1: icmp_req=11 ttl=64 time=104 ms
64 bytes from 192.168.1.1: icmp_req=12 ttl=64 time=105 ms
64 bytes from 192.168.1.1: icmp_req=13 ttl=64 time=112 ms
64 bytes from 192.168.1.1: icmp_req=14 ttl=64 time=14.3 ms
64 bytes from 192.168.1.1: icmp_req=15 ttl=64 time=18.0 ms
64 bytes from 192.168.1.1: icmp_req=16 ttl=64 time=22.9 ms
64 bytes from 192.168.1.1: icmp_req=17 ttl=64 time=29.0 ms
64 bytes from 192.168.1.1: icmp_req=18 ttl=64 time=30.9 ms
64 bytes from 192.168.1.1: icmp_req=19 ttl=64 time=35.5 ms
64 bytes from 192.168.1.1: icmp_req=20 ttl=64 time=40.5 ms
64 bytes from 192.168.1.1: icmp_req=21 ttl=64 time=44.1 ms
64 bytes from 192.168.1.1: icmp_req=22 ttl=64 time=48.4 ms
64 bytes from 192.168.1.1: icmp_req=23 ttl=64 time=52.7 ms
64 bytes from 192.168.1.1: icmp_req=24 ttl=64 time=56.5 ms
64 bytes from 192.168.1.1: icmp_req=25 ttl=64 time=61.5 ms
64 bytes from 192.168.1.1: icmp_req=26 ttl=64 time=65.6 ms
64 bytes from 192.168.1.1: icmp_req=27 ttl=64 time=69.9 ms
64 bytes from 192.168.1.1: icmp_req=28 ttl=64 time=74.6 ms
64 bytes from 192.168.1.1: icmp_req=29 ttl=64 time=78.6 ms
64 bytes from 192.168.1.1: icmp_req=30 ttl=64 time=83.8 ms
64 bytes from 192.168.1.1: icmp_req=31 ttl=64 time=87.3 ms
64 bytes from 192.168.1.1: icmp_req=32 ttl=64 time=91.7 ms
64 bytes from 192.168.1.1: icmp_req=33 ttl=64 time=198 ms
64 bytes from 192.168.1.1: icmp_req=34 ttl=64 time=100 ms
64 bytes from 192.168.1.1: icmp_req=35 ttl=64 time=106 ms
64 bytes from 192.168.1.1: icmp_req=36 ttl=64 time=110 ms
64 bytes from 192.168.1.1: icmp_req=37 ttl=64 time=15.4 ms
64 bytes from 192.168.1.1: icmp_req=38 ttl=64 time=118 ms
64 bytes from 192.168.1.1: icmp_req=39 ttl=64 time=20.5 ms
64 bytes from 192.168.1.1: icmp_req=40 ttl=64 time=24.4 ms
64 bytes from 192.168.1.1: icmp_req=41 ttl=64 time=336 ms
64 bytes from 192.168.1.1: icmp_req=42 ttl=64 time=136 ms
64 bytes from 192.168.1.1: icmp_req=43 ttl=64 time=37.8 ms
64 bytes from 192.168.1.1: icmp_req=44 ttl=64 time=41.9 ms
64 bytes from 192.168.1.1: icmp_req=45 ttl=64 time=13.8 ms
64 bytes from 192.168.1.1: icmp_req=46 ttl=64 time=32.5 ms
64 bytes from 192.168.1.1: icmp_req=47 ttl=64 time=55.9 ms
64 bytes from 192.168.1.1: icmp_req=48 ttl=64 time=60.4 ms
64 bytes from 192.168.1.1: icmp_req=49 ttl=64 time=64.5 ms
64 bytes from 192.168.1.1: icmp_req=50 ttl=64 time=274 ms
64 bytes from 192.168.1.1: icmp_req=51 ttl=64 time=75.2 ms
64 bytes from 192.168.1.1: icmp_req=52 ttl=64 time=80.2 ms
64 bytes from 192.168.1.1: icmp_req=53 ttl=64 time=82.3 ms
64 bytes from 192.168.1.1: icmp_req=54 ttl=64 time=88.0 ms
64 bytes from 192.168.1.1: icmp_req=55 ttl=64 time=91.7 ms
64 bytes from 192.168.1.1: icmp_req=56 ttl=64 time=95.8 ms
64 bytes from 192.168.1.1: icmp_req=57 ttl=64 time=100 ms
64 bytes from 192.168.1.1: icmp_req=58 ttl=64 time=106 ms
64 bytes from 192.168.1.1: icmp_req=59 ttl=64 time=108 ms
64 bytes from 192.168.1.1: icmp_req=60 ttl=64 time=113 ms
64 bytes from 192.168.1.1: icmp_req=61 ttl=64 time=15.3 ms
64 bytes from 192.168.1.1: icmp_req=62 ttl=64 time=19.8 ms
64 bytes from 192.168.1.1: icmp_req=63 ttl=64 time=24.2 ms
64 bytes from 192.168.1.1: icmp_req=64 ttl=64 time=27.3 ms
64 bytes from 192.168.1.1: icmp_req=65 ttl=64 time=32.5 ms
64 bytes from 192.168.1.1: icmp_req=66 ttl=64 time=36.2 ms
64 bytes from 192.168.1.1: icmp_req=67 ttl=64 time=41.2 ms
64 bytes from 192.168.1.1: icmp_req=68 ttl=64 time=44.7 ms
64 bytes from 192.168.1.1: icmp_req=69 ttl=64 time=48.6 ms
64 bytes from 192.168.1.1: icmp_req=70 ttl=64 time=53.0 ms
64 bytes from 192.168.1.1: icmp_req=71 ttl=64 time=58.0 ms
64 bytes from 192.168.1.1: icmp_req=72 ttl=64 time=62.6 ms
64 bytes from 192.168.1.1: icmp_req=73 ttl=64 time=66.7 ms
64 bytes from 192.168.1.1: icmp_req=74 ttl=64 time=70.2 ms
64 bytes from 192.168.1.1: icmp_req=75 ttl=64 time=75.8 ms
64 bytes from 192.168.1.1: icmp_req=76 ttl=64 time=79.1 ms
64 bytes from 192.168.1.1: icmp_req=77 ttl=64 time=83.9 ms
64 bytes from 192.168.1.1: icmp_req=78 ttl=64 time=88.4 ms
64 bytes from 192.168.1.1: icmp_req=79 ttl=64 time=92.6 ms
64 bytes from 192.168.1.1: icmp_req=80 ttl=64 time=97.5 ms
64 bytes from 192.168.1.1: icmp_req=81 ttl=64 time=101 ms
64 bytes from 192.168.1.1: icmp_req=82 ttl=64 time=105 ms
64 bytes from 192.168.1.1: icmp_req=83 ttl=64 time=7.06 ms
64 bytes from 192.168.1.1: icmp_req=84 ttl=64 time=113 ms
64 bytes from 192.168.1.1: icmp_req=85 ttl=64 time=18.9 ms
64 bytes from 192.168.1.1: icmp_req=86 ttl=64 time=21.6 ms
64 bytes from 192.168.1.1: icmp_req=87 ttl=64 time=25.7 ms
64 bytes from 192.168.1.1: icmp_req=88 ttl=64 time=32.3 ms
64 bytes from 192.168.1.1: icmp_req=89 ttl=64 time=33.6 ms
64 bytes from 192.168.1.1: icmp_req=90 ttl=64 time=38.6 ms
64 bytes from 192.168.1.1: icmp_req=91 ttl=64 time=42.1 ms
64 bytes from 192.168.1.1: icmp_req=92 ttl=64 time=47.0 ms
64 bytes from 192.168.1.1: icmp_req=93 ttl=64 time=53.0 ms
64 bytes from 192.168.1.1: icmp_req=94 ttl=64 time=56.0 ms
64 bytes from 192.168.1.1: icmp_req=95 ttl=64 time=61.3 ms
64 bytes from 192.168.1.1: icmp_req=96 ttl=64 time=65.5 ms
64 bytes from 192.168.1.1: icmp_req=97 ttl=64 time=69.9 ms
64 bytes from 192.168.1.1: icmp_req=98 ttl=64 time=74.0 ms
64 bytes from 192.168.1.1: icmp_req=99 ttl=64 time=81.7 ms
64 bytes from 192.168.1.1: icmp_req=100 ttl=64 time=85.1 ms
64 bytes from 192.168.1.1: icmp_req=101 ttl=64 time=88.6 ms
64 bytes from 192.168.1.1: icmp_req=102 ttl=64 time=92.7 ms
64 bytes from 192.168.1.1: icmp_req=103 ttl=64 time=96.8 ms
64 bytes from 192.168.1.1: icmp_req=104 ttl=64 time=102 ms
64 bytes from 192.168.1.1: icmp_req=105 ttl=64 time=105 ms
64 bytes from 192.168.1.1: icmp_req=106 ttl=64 time=7.56 ms
64 bytes from 192.168.1.1: icmp_req=107 ttl=64 time=113 ms
64 bytes from 192.168.1.1: icmp_req=108 ttl=64 time=16.2 ms
64 bytes from 192.168.1.1: icmp_req=109 ttl=64 time=20.3 ms
64 bytes from 192.168.1.1: icmp_req=110 ttl=64 time=24.3 ms
64 bytes from 192.168.1.1: icmp_req=111 ttl=64 time=31.2 ms
64 bytes from 192.168.1.1: icmp_req=112 ttl=64 time=32.7 ms
64 bytes from 192.168.1.1: icmp_req=113 ttl=64 time=36.6 ms
64 bytes from 192.168.1.1: icmp_req=114 ttl=64 time=40.2 ms
64 bytes from 192.168.1.1: icmp_req=115 ttl=64 time=144 ms
64 bytes from 192.168.1.1: icmp_req=116 ttl=64 time=49.2 ms
64 bytes from 192.168.1.1: icmp_req=117 ttl=64 time=53.5 ms
64 bytes from 192.168.1.1: icmp_req=118 ttl=64 time=57.4 ms
64 bytes from 192.168.1.1: icmp_req=119 ttl=64 time=61.6 ms
64 bytes from 192.168.1.1: icmp_req=120 ttl=64 time=68.7 ms
64 bytes from 192.168.1.1: icmp_req=121 ttl=64 time=70.7 ms
64 bytes from 192.168.1.1: icmp_req=122 ttl=64 time=74.5 ms
64 bytes from 192.168.1.1: icmp_req=123 ttl=64 time=78.7 ms
64 bytes from 192.168.1.1: icmp_req=124 ttl=64 time=82.5 ms
64 bytes from 192.168.1.1: icmp_req=125 ttl=64 time=87.0 ms
64 bytes from 192.168.1.1: icmp_req=126 ttl=64 time=91.6 ms
64 bytes from 192.168.1.1: icmp_req=127 ttl=64 time=95.0 ms
64 bytes from 192.168.1.1: icmp_req=128 ttl=64 time=99.5 ms

--- 192.168.1.1 ping statistics ---
128 packets transmitted, 128 received, 0% packet loss, time 25459ms
rtt min/avg/max/mdev = 7.063/70.368/336.118/44.411 ms, pipe 2, ipg/ewma 200.466/78.322 ms
Связи таких моментов с включением электроприборов или местоположением ноутбука выявить не удалось. Обратите внимание на характер задержки: за несколько секунд плавно увеличивается вплоть до 100 с небольшим ms, а потом резко падает, становясь почти нормальной. Знать бы ещё какой из этого можно сделать вывод :-/ Да, и эта странность, как и все, присутствует только на ноутбуке. Буквально запускал пинг одновременно на ноуте и N900, клал N900 на клавиатуру ноута для исключения разницы из-за различного геометрического расположения и сравнивал результаты. Но ноуте странности, на N900 нормальные ~ 1.5ms.

[lspci Wi-Fi контроллера]
$ sudo lspci -vvs 01:00.0
01:00.0 Network controller: Intel Corporation Centrino Wireless-N 130 (rev 34)
    Subsystem: Intel Corporation Centrino Wireless-N 130 BGN
    Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
    Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
    Latency: 0, Cache Line Size: 64 bytes
    Interrupt: pin A routed to IRQ 45
    Region 0: Memory at 90500000 (64-bit, non-prefetchable) [size=8K]
    Capabilities: [c8] Power Management version 3
        Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
        Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
    Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
        Address: 00000000fee0300c  Data: 418c
    Capabilities: [e0] Express (v1) Endpoint, MSI 00
        DevCap:    MaxPayload 128 bytes, PhantFunc 0, Latency L0s <512ns, L1 unlimited
            ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset+
        DevCtl:    Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
            RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+ FLReset-
            MaxPayload 128 bytes, MaxReadReq 128 bytes
        DevSta:    CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+ TransPend-
        LnkCap:    Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Latency L0 <4us, L1 <32us
            ClockPM+ Surprise- LLActRep- BwNot-
        LnkCtl:    ASPM L0s L1 Enabled; RCB 64 bytes Disabled- Retrain- CommClk+
            ExtSynch- ClockPM+ AutWidDis- BWInt- AutBWInt-
        LnkSta:    Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
    Capabilities: [100 v1] Advanced Error Reporting
        UESta:    DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
        UEMsk:    DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
        UESvrt:    DLP+ SDES- TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol-
        CESta:    RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr-
        CEMsk:    RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
        AERCap:    First Error Pointer: 00, GenCap- CGenEn- ChkCap- ChkEn-
    Capabilities: [140 v1] Device Serial Number b8-03-05-ff-ff-96-80-98
    Kernel driver in use: iwlwifi
    Kernel modules: iwlwifi


Как диагностировать? Что гуглить? Что крутить?

UPD: Увидел такой же эффектом с пингом на смартфоне. Итого прихожу к выводу, что виноват роутер.

UPD: Обновился до 12.10, стало лучше. После отключения от точки доступа можно подключиться к ней снова без дополнительных манипуляций. Но после ухода в suspend/hibernation/shutdown начинает проявляться долгий плавающий пинг. Лечится перезагрузкой модуля iwlwifi. Добавил костыльный скрипт в /etc/network/if-up.d пингующий несколько раз GW и перезагружающий iwlwifi если средний rtt больше 10мс.

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