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弱いWiFi信号

Fujitsu Lifebook AH531を持っています（ワイヤレスはIntel®Centrino®Wireless-N 1030、802.11 b/g/nと思います）

Ubuntu 14.04 LTSを最近インストールしました以前は、同じマシンでUbuntu 12.04 LTSとWindows 7を使用しましたが、WiFi信号は正常でした。

14.04 LTSをインストールした後、WiFi信号は非常に低くなります。比較すると、私の携帯電話とMacBookは完全な信号を示しています。

これはiwconfigが示すものです（「x」が追加されました）。

vmnet8    no wireless extensions.

eth0      no wireless extensions.

lo        no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:"xxxxxxx"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: xx:xx:xx:xx:xx:xx   
          Bit Rate=65 Mb/s   Tx-Power=15 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=38/70  Signal level=-72 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:2  Invalid misc:33   Missed beacon:0

vmnet1    no wireless extensions.

これの原因と解決方法に関するアイデアはありますか？

更新1：これらはdmesgの結果です| grep iwl：

[   12.981861] iwlwifi 0000:01:00.0: can't disable ASPM; OS doesn't have ASPM control
[   12.982170] iwlwifi 0000:01:00.0: irq 43 for MSI/MSI-X
[   13.395624] iwlwifi 0000:01:00.0: loaded firmware version 18.168.6.1 op_mode iwldvm
[   13.414785] iwlwifi 0000:01:00.0: CONFIG_IWLWIFI_DEBUG disabled
[   13.414787] iwlwifi 0000:01:00.0: CONFIG_IWLWIFI_DEBUGFS enabled
[   13.414788] iwlwifi 0000:01:00.0: CONFIG_IWLWIFI_DEVICE_TRACING enabled
[   13.414790] iwlwifi 0000:01:00.0: Detected Intel(R) Centrino(R) Wireless-N 1030 BGN, REV=0xB0
[   13.414893] iwlwifi 0000:01:00.0: L1 Enabled; Disabling L0S
[   13.435161] ieee80211 phy0: Selected rate control algorithm 'iwl-agn-rs'
[   16.755014] iwlwifi 0000:01:00.0: L1 Enabled; Disabling L0S
[   16.761688] iwlwifi 0000:01:00.0: Radio type=0x2-0x2-0x1
[   16.829339] iwlwifi 0000:01:00.0: L1 Enabled; Disabling L0S
[   16.836056] iwlwifi 0000:01:00.0: Radio type=0x2-0x2-0x1
[ 1795.831710] iwlwifi 0000:01:00.0: no hotplug settings from platform
[ 1797.361326] iwlwifi 0000:01:00.0: L1 Enabled; Disabling L0S
[ 1797.368062] iwlwifi 0000:01:00.0: Radio type=0x2-0x2-0x1
[ 2408.998423] iwlwifi 0000:01:00.0: fail to flush all tx fifo queues Q 2
[ 2408.998438] iwlwifi 0000:01:00.0: Current SW read_ptr 227 write_ptr 101
[ 2408.998496] iwl data: 00000000: 00 00 00 00 00 00 00 00 f8 ff 07 00 00 00 00 00  ................
[ 2408.998540] iwlwifi 0000:01:00.0: FH TRBs(0) = 0x80003019
[ 2408.998584] iwlwifi 0000:01:00.0: FH TRBs(1) = 0x801020f2
[ 2408.998627] iwlwifi 0000:01:00.0: FH TRBs(2) = 0x00000000
[ 2408.998668] iwlwifi 0000:01:00.0: FH TRBs(3) = 0x80300027
[ 2408.998711] iwlwifi 0000:01:00.0: FH TRBs(4) = 0x00000000
[ 2408.998751] iwlwifi 0000:01:00.0: FH TRBs(5) = 0x00000000
[ 2408.998789] iwlwifi 0000:01:00.0: FH TRBs(6) = 0x00000000
[ 2408.998836] iwlwifi 0000:01:00.0: FH TRBs(7) = 0x0070903b
[ 2408.998926] iwlwifi 0000:01:00.0: Q 0 is active and mapped to fifo 3 ra_tid 0x0000 [40,40]
[ 2408.999016] iwlwifi 0000:01:00.0: Q 1 is active and mapped to fifo 2 ra_tid 0x0000 [0,0]
[ 2408.999116] iwlwifi 0000:01:00.0: Q 2 is active and mapped to fifo 1 ra_tid 0x0000 [227,101]
[ 2408.999205] iwlwifi 0000:01:00.0: Q 3 is active and mapped to fifo 0 ra_tid 0x0000 [26,26]
[ 2408.999293] iwlwifi 0000:01:00.0: Q 4 is active and mapped to fifo 0 ra_tid 0x0000 [0,0]
[ 2408.999417] iwlwifi 0000:01:00.0: Q 5 is active and mapped to fifo 4 ra_tid 0x0000 [0,0]
[ 2408.999505] iwlwifi 0000:01:00.0: Q 6 is active and mapped to fifo 2 ra_tid 0x0000 [0,0]
[ 2408.999635] iwlwifi 0000:01:00.0: Q 7 is active and mapped to fifo 5 ra_tid 0x0000 [0,0]
[ 2408.999732] iwlwifi 0000:01:00.0: Q 8 is active and mapped to fifo 4 ra_tid 0x0000 [0,0]
[ 2408.999822] iwlwifi 0000:01:00.0: Q 9 is active and mapped to fifo 7 ra_tid 0x0000 [60,60]
[ 2408.999920] iwlwifi 0000:01:00.0: Q 10 is active and mapped to fifo 5 ra_tid 0x0000 [0,0]
[ 2409.000007] iwlwifi 0000:01:00.0: Q 11 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[ 2409.000092] iwlwifi 0000:01:00.0: Q 12 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[ 2409.000177] iwlwifi 0000:01:00.0: Q 13 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[ 2409.000269] iwlwifi 0000:01:00.0: Q 14 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[ 2409.000358] iwlwifi 0000:01:00.0: Q 15 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[ 2409.000442] iwlwifi 0000:01:00.0: Q 16 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[ 2409.000521] iwlwifi 0000:01:00.0: Q 17 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[ 2409.000607] iwlwifi 0000:01:00.0: Q 18 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[ 2409.000686] iwlwifi 0000:01:00.0: Q 19 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[ 2477.855478] iwlwifi 0000:01:00.0: fail to flush all tx fifo queues Q 2
[ 2477.855490] iwlwifi 0000:01:00.0: Current SW read_ptr 70 write_ptr 194
[ 2477.855544] iwl data: 00000000: c0 ff 3f 00 00 00 00 00 00 00 00 00 00 00 00 00  ..?.............
[ 2477.855586] iwlwifi 0000:01:00.0: FH TRBs(0) = 0x8000301b
[ 2477.855624] iwlwifi 0000:01:00.0: FH TRBs(1) = 0x80102055
[ 2477.855661] iwlwifi 0000:01:00.0: FH TRBs(2) = 0x00000000
[ 2477.855697] iwlwifi 0000:01:00.0: FH TRBs(3) = 0x8030002e
[ 2477.855734] iwlwifi 0000:01:00.0: FH TRBs(4) = 0x00000000
[ 2477.855770] iwlwifi 0000:01:00.0: FH TRBs(5) = 0x00000000
[ 2477.855807] iwlwifi 0000:01:00.0: FH TRBs(6) = 0x00000000
[ 2477.855844] iwlwifi 0000:01:00.0: FH TRBs(7) = 0x007090c7
[ 2477.855924] iwlwifi 0000:01:00.0: Q 0 is active and mapped to fifo 3 ra_tid 0x0000 [47,47]
[ 2477.856075] iwlwifi 0000:01:00.0: Q 1 is active and mapped to fifo 2 ra_tid 0x0000 [0,0]
[ 2477.856159] iwlwifi 0000:01:00.0: Q 2 is active and mapped to fifo 1 ra_tid 0x0000 [70,194]
[ 2477.856237] iwlwifi 0000:01:00.0: Q 3 is active and mapped to fifo 0 ra_tid 0x0000 [28,28]
[ 2477.856324] iwlwifi 0000:01:00.0: Q 4 is active and mapped to fifo 0 ra_tid 0x0000 [0,0]
[ 2477.856403] iwlwifi 0000:01:00.0: Q 5 is active and mapped to fifo 4 ra_tid 0x0000 [0,0]
[ 2477.856488] iwlwifi 0000:01:00.0: Q 6 is active and mapped to fifo 2 ra_tid 0x0000 [0,0]
[ 2477.856567] iwlwifi 0000:01:00.0: Q 7 is active and mapped to fifo 5 ra_tid 0x0000 [0,0]
[ 2477.856645] iwlwifi 0000:01:00.0: Q 8 is active and mapped to fifo 4 ra_tid 0x0000 [0,0]
[ 2477.856725] iwlwifi 0000:01:00.0: Q 9 is active and mapped to fifo 7 ra_tid 0x0000 [200,200]
[ 2477.856805] iwlwifi 0000:01:00.0: Q 10 is active and mapped to fifo 5 ra_tid 0x0000 [0,0]
[ 2477.856885] iwlwifi 0000:01:00.0: Q 11 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[ 2477.856965] iwlwifi 0000:01:00.0: Q 12 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[ 2477.857044] iwlwifi 0000:01:00.0: Q 13 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[ 2477.857122] iwlwifi 0000:01:00.0: Q 14 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[ 2477.857202] iwlwifi 0000:01:00.0: Q 15 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[ 2477.857282] iwlwifi 0000:01:00.0: Q 16 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[ 2477.857363] iwlwifi 0000:01:00.0: Q 17 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[ 2477.857443] iwlwifi 0000:01:00.0: Q 18 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[ 2477.857521] iwlwifi 0000:01:00.0: Q 19 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[38618.427882] iwlwifi 0000:01:00.0: fail to flush all tx fifo queues Q 2
[38618.427898] iwlwifi 0000:01:00.0: Current SW read_ptr 20 write_ptr 43
[38618.427952] iwl data: 00000000: 00 00 f0 ff 00 00 00 00 0f 00 00 00 00 00 00 00  ................
[38618.428008] iwlwifi 0000:01:00.0: FH TRBs(0) = 0x80003090
[38618.428064] iwlwifi 0000:01:00.0: FH TRBs(1) = 0x80102023
[38618.428120] iwlwifi 0000:01:00.0: FH TRBs(2) = 0x00000000
[38618.428171] iwlwifi 0000:01:00.0: FH TRBs(3) = 0x8030004c
[38618.428210] iwlwifi 0000:01:00.0: FH TRBs(4) = 0x00000000
[38618.428257] iwlwifi 0000:01:00.0: FH TRBs(5) = 0x00000000
[38618.428322] iwlwifi 0000:01:00.0: FH TRBs(6) = 0x00000000
[38618.428385] iwlwifi 0000:01:00.0: FH TRBs(7) = 0x00709010
[38618.428530] iwlwifi 0000:01:00.0: Q 0 is active and mapped to fifo 3 ra_tid 0x0000 [77,77]
[38618.428677] iwlwifi 0000:01:00.0: Q 1 is active and mapped to fifo 2 ra_tid 0x0000 [0,0]
[38618.428801] iwlwifi 0000:01:00.0: Q 2 is active and mapped to fifo 1 ra_tid 0x0000 [20,43]
[38618.428929] iwlwifi 0000:01:00.0: Q 3 is active and mapped to fifo 0 ra_tid 0x0000 [145,145]
[38618.429071] iwlwifi 0000:01:00.0: Q 4 is active and mapped to fifo 0 ra_tid 0x0000 [0,0]
[38618.429173] iwlwifi 0000:01:00.0: Q 5 is active and mapped to fifo 4 ra_tid 0x0000 [0,0]
[38618.429275] iwlwifi 0000:01:00.0: Q 6 is active and mapped to fifo 2 ra_tid 0x0000 [0,0]
[38618.429378] iwlwifi 0000:01:00.0: Q 7 is active and mapped to fifo 5 ra_tid 0x0000 [0,0]
[38618.429463] iwlwifi 0000:01:00.0: Q 8 is active and mapped to fifo 4 ra_tid 0x0000 [0,0]
[38618.429553] iwlwifi 0000:01:00.0: Q 9 is active and mapped to fifo 7 ra_tid 0x0000 [17,17]
[38618.429655] iwlwifi 0000:01:00.0: Q 10 is active and mapped to fifo 5 ra_tid 0x0000 [0,0]
[38618.429741] iwlwifi 0000:01:00.0: Q 11 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[38618.429843] iwlwifi 0000:01:00.0: Q 12 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[38618.429939] iwlwifi 0000:01:00.0: Q 13 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[38618.430110] iwlwifi 0000:01:00.0: Q 14 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[38618.430315] iwlwifi 0000:01:00.0: Q 15 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[38618.430448] iwlwifi 0000:01:00.0: Q 16 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[38618.430544] iwlwifi 0000:01:00.0: Q 17 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[38618.430649] iwlwifi 0000:01:00.0: Q 18 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]
[38618.430762] iwlwifi 0000:01:00.0: Q 19 is inactive and mapped to fifo 0 ra_tid 0x0000 [0,0]

更新2：@ chili555によって提案された修正を試みましたが、これらは結果です。

dmesg | grep iwl
[   12.554087] iwlwifi 0000:01:00.0: can't disable ASPM; OS doesn't have ASPM control
[   12.554303] iwlwifi 0000:01:00.0: irq 42 for MSI/MSI-X
[   12.928234] iwlwifi 0000:01:00.0: loaded firmware version 18.168.6.1 op_mode iwldvm
[   12.947135] iwlwifi 0000:01:00.0: CONFIG_IWLWIFI_DEBUG disabled
[   12.947136] iwlwifi 0000:01:00.0: CONFIG_IWLWIFI_DEBUGFS enabled
[   12.947137] iwlwifi 0000:01:00.0: CONFIG_IWLWIFI_DEVICE_TRACING enabled
[   12.947138] iwlwifi 0000:01:00.0: Detected Intel(R) Centrino(R) Wireless-N 1030 BGN, REV=0xB0
[   12.947242] iwlwifi 0000:01:00.0: L1 Enabled; Disabling L0S
[   12.967026] ieee80211 phy0: Selected rate control algorithm 'iwl-agn-rs'
[   16.787447] iwlwifi 0000:01:00.0: L1 Enabled; Disabling L0S
[   16.794188] iwlwifi 0000:01:00.0: Radio type=0x2-0x2-0x1
[   16.862264] iwlwifi 0000:01:00.0: L1 Enabled; Disabling L0S
[   16.868991] iwlwifi 0000:01:00.0: Radio type=0x2-0x2-0x1

すべてのfifioエラーが表示されなくなりました

iwconfig 
vmnet8    no wireless extensions.

eth0      no wireless extensions.

lo        no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:"xxxxx"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: xxxxxxxxxx   
          Bit Rate=65 Mb/s   Tx-Power=15 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=43/70  Signal level=-67 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:4   Missed beacon:0

vmnet1    no wireless extensions.

リンク品質と信号レベルの両方にわずかな改善があります。

それでも、私が所有する他のデバイスと比較すると、信号品質は低くなります。

14.04wirelessnetworkingintel-wireless
1
AugustinJ

あなたのdmesgの一部は次のとおりです。

すべてのtx fifoキューをフラッシュできません

これはバグレポートの主題です： https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1361809 As youコメント＃6で確認できます。パッチが適用されたカーネルがあり、修正されたことを報告するフォローアップがあります。私もubuntuforums.orgで同様の問題を知っており、これも問題を修正しました。

ここに行くことをお勧めします： http://people.canonical.com/~sforshee/lp1361809/linux-3.13.0-37.64+lp1361809v201410060628/ ダウンロードアーキテクチャに適したlinux-imageおよびlinux-image-extraの.debファイル。 32ビットまたは64ビット。ターミナルから調べる：

Arch

32ビットシステムではi686が返され、64ビットシステムではx86_64が返されます。たとえば、ご使用のシステムが64ビットシステムの場合、linux-image AMD64.debファイルとlinux-image-extras AMD64.debファイルをダウンロードします。でインストール：

cd ~/Downloads  <--or wherever you downloaded the files
Sudo dpkg -i linux*.deb

再起動して、結果を聞かせてください。

パフォーマンスが改善されない場合は、ドライバーパラメーターを試してみましょう。

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

そして、再起動してテストします。

これが効果がない場合は、以下を実行してください。

gksudo gedit /etc/modprobe.d/iwlwifi.conf

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。

options iwlwifi 11n_disable=1

慎重に校正し、テキストエディターを保存して閉じます。再起動してテストします。

2
chili555