需要解决长期缓慢的 wifi 连接问题

需要解决长期缓慢的 wifi 连接问题

一段时间以来,我的多个网络的 wifi 连接一直很慢,我想这要从我更新到 12.04 版本开始。我尝试了论坛上已有的许多提示和技巧,但都没有成功(wicd 等)。我想看看你们这些专家是否能帮助我,提前谢谢大家!!

我在联想 ideapad y650 上使用 ubuntu 12.04,我连接的大多数网络经常断开连接或者在连接时没有提供适当的带宽。

以下是一些常规系统检查的结果:

cat /etc/lsb-release; uname -a:

DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.04
DISTRIB_CODENAME=precise
DISTRIB_DESCRIPTION="Ubuntu 12.04.2 LTS"    
Linux mgeorge-lenovo 3.2.0-48-generic-pae #74-Ubuntu SMP Thu Jun 6 20:05:01 UTC 2013 i686 i686 i386 GNU/Linux

请参阅lspci-nnk| grep -iA2 网:

04:00.0 Network controller [0280]: Intel Corporation PRO/Wireless 5100 AGN [Shiloh] 

Network Connection [8086:4237]
    Subsystem: Intel Corporation WiFi Link 5100 AGN [8086:1211]
    Kernel driver in use: iwlwifi
--
08:00.0 Ethernet controller [0200]: Broadcom Corporation NetLink BCM5784M Gigabit Ethernet PCIe [14e4:1698] (rev 10)
    Subsystem: Lenovo Device [17aa:3878]
    Kernel driver in use: tg3

lsusb:

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 002: ID 090c:7371 Silicon Motion, Inc. - Taiwan (formerly Feiya Technology Corp.) 

配置:

lo        no wireless extensions.

wlan0     IEEE 802.11abgn  ESSID:"Dyno"  
          Mode:Managed  Frequency:2.412 GHz  Access Point: CC:5D:4E:46:0A:93   
          Bit Rate=150 Mb/s   Tx-Power=15 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=70/70  Signal level=-40 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:948  Invalid misc:728   Missed beacon:0

eth0      no wireless extensions.

rfkill 列出全部:

0: ideapad_wlan: Wireless LAN

    Soft blocked: no
    Hard blocked: no

1: ideapad_bluetooth: Bluetooth

    Soft blocked: yes
    Hard blocked: no

2: phy0: Wireless LAN

    Soft blocked: no
    Hard blocked: no

lsmod:

Module                  Size  Used by
uvcvideo               67203  0 
videodev               86588  1 uvcvideo
nouveau               712674  3 
ttm                    65344  1 nouveau
drm_kms_helper         45466  1 nouveau
drm                   197641  5 nouveau,ttm,drm_kms_helper
i2c_algo_bit           13199  1 nouveau
mxm_wmi                12893  1 nouveau
wmi                    18744  1 mxm_wmi
joydev                 17393  0 
arc4                   12473  2 
snd_hda_codec_realtek   174313  1 
snd_hda_codec_hdmi     31775  1 
snd_hda_intel          32719  3 
snd_hda_codec         109562  3 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_intel
snd_hwdep              13276  1 snd_hda_codec
snd_pcm                80916  3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
snd_seq_midi           13132  0 
snd_rawmidi            25424  1 snd_seq_midi
snd_seq_midi_event     14475  1 snd_seq_midi
psmouse                86520  0 
snd_seq                51592  2 snd_seq_midi,snd_seq_midi_event
serio_raw              13027  0 
snd_timer              28931  2 snd_pcm,snd_seq
snd_seq_device         14172  3 snd_seq_midi,snd_rawmidi,snd_seq
iwlwifi               366509  0 
mac80211              436493  1 iwlwifi
snd                    62218  16 
snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,sn
d_rawmidi,snd_seq,snd_timer,snd_seq_device
ideapad_laptop         17890  0 
sparse_keymap          13658  1 ideapad_laptop
cfg80211              178877  2 iwlwifi,mac80211
ir_lirc_codec          12739  0 
lirc_dev               18700  1 ir_lirc_codec
soundcore              14635  1 snd
snd_page_alloc         14108  2 snd_hda_intel,snd_pcm
ir_mce_kbd_decoder     12681  0 
ir_sony_decoder        12462  0 
ir_jvc_decoder         12459  0 
ir_rc6_decoder         12459  0 
ir_rc5_decoder         12459  0 
rc_rc6_mce             12454  0 
ir_nec_decoder         12459  0 
video                  19115  1 nouveau
ene_ir                 18019  0 
rc_core                21263  10 
ir_lirc_codec,ir_mce_kbd_decoder,ir_sony_decoder,ir_jvc_decoder,ir_rc6_decoder,ir_rc5_decoder,rc_rc6_mce,ir_nec_decoder,ene_ir
bnep                   17830  2 
rfcomm                 38139  0 
parport_pc             32114  0 
bluetooth             158479  10 bnep,rfcomm
ppdev                  12849  0 
binfmt_misc            17292  1 
mac_hid                13077  0 
lp                     17455  0 
parport                40930  3 parport_pc,ppdev,lp
tg3                   141414  0 

nm 工具:

NetworkManager Tool

State: connected (global)

- Device: eth0 -----------------------------------------------------------------
  Type:              Wired
  Driver:            tg3
  State:             unavailable
  Default:           no
  HW Address:        00:23:5A:CC:85:BD

  Capabilities:
    Carrier Detect:  yes

  Wired Properties
    Carrier:         off


- Device: wlan0  [Dyno] --------------------------------------------------------
  Type:              802.11 WiFi
  Driver:            iwlwifi
  State:             connected
  Default:           yes
  HW Address:        00:22:FA:D0:94:CA

  Capabilities:
    Speed:           150 Mb/s

  Wireless Properties
    WEP Encryption:  yes
    WPA Encryption:  yes
    WPA2 Encryption: yes

  Wireless Access Points (* = current AP)
    *Dyno:           Infra, CC:5D:4E:46:0A:93, Freq 2412 MHz, Rate 54 Mb/s, Strength 81 WPA2

  IPv4 Settings:
    Address:         10.0.0.43
    Prefix:          24 (255.255.255.0)
    Gateway:         10.0.0.1

    DNS:             10.0.0.1

答案1

无线-N 存在一个常见的错误,因此我们必须禁用它。

请尝试以下操作:

sudo modprobe -r iwlwifi && sudo modprobe iwlwifi 11n_disable=1

检查您的无线速度。如果速度有所改善,请执行以下操作以使速度保持稳定:

sudo sh -c 'echo "options iwlwifi 11n_disable=1" >> /etc/modprobe.d/iwlwifi.conf'

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