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Thread: Ubuntu 12.04 and Intel Centrino N-1000 Very slow network

  1. #1
    Join Date
    Dec 2013
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    Ubuntu 12.04 and Intel Centrino N-1000 Very slow network

    Hello,

    I am having trouble reaching normal connection speeds on this laptop when running Linux (Ubuntu 12.04). When booting in Windows download speeds are normal, but in linux the computer cannot pass 2Mbps. I tried creating a file /etc/modprobe.d/iwlwifi.conf and add the line options iwlwifi 11n_disable=1 But nothing changed. I also installed new firmware from http://wireless.kernel.org/en/users/Drivers/iwlwifi but again nothing changed. Also I noticed that some networks are not visible at all. Any ideas?

    Code:
    # lspci | grep Network
    04:00.0 Network controller: Intel Corporation Centrino Wireless-N 1000
    Code:
    # iwconfig
    eth0      no wireless extensions.
    
    lo        no wireless extensions.
    
    wlan0     IEEE 802.11bg  ESSID:"***"  
              Mode:Managed  Frequency:2.437 GHz  Access Point: **:**:**:**:**
              Bit Rate=1 Mb/s   Tx-Power=14 dBm   
              Retry  long limit:7   RTS thr:off   Fragment thr:off
              Power Management:off
              Link Quality=60/70  Signal level=-50 dBm  
              Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
              Tx excessive retries:281  Invalid misc:3925   Missed beacon:0
    Code:
    # dmesg | grep iwl
    [    8.112523] iwlwifi 0000:04:00.0: irq 50 for MSI/MSI-X
    [    8.334091] iwlwifi 0000:04:00.0: loaded firmware version 39.31.5.1 build 35138
    [    8.832685] iwlwifi 0000:04:00.0: CONFIG_IWLWIFI_DEBUG disabled
    [    8.832686] iwlwifi 0000:04:00.0: CONFIG_IWLWIFI_DEBUGFS enabled
    [    8.832687] iwlwifi 0000:04:00.0: CONFIG_IWLWIFI_DEVICE_TRACING enabled
    [    8.832688] iwlwifi 0000:04:00.0: CONFIG_IWLWIFI_DEVICE_TESTMODE enabled
    [    8.832689] iwlwifi 0000:04:00.0: CONFIG_IWLWIFI_P2P disabled
    [    8.832691] iwlwifi 0000:04:00.0: Detected Intel(R) Centrino(R) Wireless-N 1000 BGN, REV=0x6C
    [    8.832825] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S
    [    8.840179] iwlwifi 0000:04:00.0: RF_KILL bit toggled to enable radio.
    [    8.858149] ieee80211 phy0: Selected rate control algorithm 'iwl-agn-rs'
    [   13.259857] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S
    [   13.267226] iwlwifi 0000:04:00.0: Radio type=0x0-0x0-0x3
    [   13.407778] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S
    [   13.415142] iwlwifi 0000:04:00.0: Radio type=0x0-0x0-0x3

  2. #2
    Join Date
    Aug 2011
    Location
    Berlin, Germany
    Beans
    5,538
    Distro
    Xubuntu 12.04 Precise Pangolin

    Re: Ubuntu 12.04 and Intel Centrino N-1000 Very slow network

    Deactivate the N-mode (bug) of the driver:
    Code:
    echo "options 11n_disable=1" | sudo tee /etc/modprobe.d/iwlwifi.conf
    sudo modprobe -rfv iwlwifi
    sudo modprobe -v iwlwifi
    Edit: I just saw you tried it. Change the encryption mode to pure WPA2-AES and a fixed channel
    Last edited by praseodym; January 13th, 2014 at 08:56 PM.

  3. #3
    Join Date
    Dec 2013
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    Re: Ubuntu 12.04 and Intel Centrino N-1000 Very slow network

    Thanks for the reply
    I already tried that, rebooted and nothing changed.

  4. #4
    Join Date
    Apr 2010
    Location
    United Kingdom, England
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    62
    Distro
    Ubuntu 13.10 Saucy Salamander

    Re: Ubuntu 12.04 and Intel Centrino N-1000 Very slow network

    Also try updating kernel http://ubuntuhandbook.org/index.php/...tu-linux-mint/

    sudo apt-get install linux-headers-generic build-essential
    wget http://www.kernel.org/pub/linux/kern...12.2-1.tar.bz2
    tar xvf backports-3.12.2-1.tar.bz2
    cd backports-3.12.2-1
    make defconfig-wifi
    make
    sudo make install

  5. #5
    Join Date
    Dec 2013
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    Re: Ubuntu 12.04 and Intel Centrino N-1000 Very slow network

    I just compiled and installed the new modules. Again the same speed. Does not pass 2Mb/s.

    Another note: I tried running ubuntu 13 live cd and fedora 20, both connected at the same speed. So it's probably broken driver.

    Quote Originally Posted by ukbeast View Post
    Also try updating kernel http://ubuntuhandbook.org/index.php/...tu-linux-mint/

    sudo apt-get install linux-headers-generic build-essential
    wget http://www.kernel.org/pub/linux/kern...12.2-1.tar.bz2
    tar xvf backports-3.12.2-1.tar.bz2
    cd backports-3.12.2-1
    make defconfig-wifi
    make
    sudo make install

  6. #6
    Join Date
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    Xubuntu 12.04 Precise Pangolin

    Re: Ubuntu 12.04 and Intel Centrino N-1000 Very slow network

    Shouldnt it had been

    Code:
     make defconfig-iwlwifi
    ?!

  7. #7
    Join Date
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    Re: Ubuntu 12.04 and Intel Centrino N-1000 Very slow network

    I think it also compiled iwlwifi, among others.

    Code:
    modinfo iwlwifi
    filename:       /lib/modules/3.8.0-35-generic/updates/drivers/net/wireless/iwlwifi/iwlwifi.ko
    version:        backported from Linux (v3.12.2-0-g050dcf4) using backports v3.12.2-1-0-gb4b7ee5
    ....
    Quote Originally Posted by praseodym View Post
    Shouldnt it had been

    Code:
     make defconfig-iwlwifi
    ?!

  8. #8
    Join Date
    Aug 2005
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    West of the Animas
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    20,228
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Ubuntu 12.04 and Intel Centrino N-1000 Very slow network

    I think it also compiled iwlwifi, among others.
    Correct. defconfig-wifi compiles all the wireless drivers; defconfig-iwlwifi compiles only the iwlwifi suite, skipping,among others ath9k, b43, rtlwifi, etc., etc.

    I hope my friend praseodym won't mind if I offer a suggestion or two.

    The driver iwlwifi and its associated firmware are tricky; when they work, they are wonderful and when they don't, they are difficult to tweak and get going correctly. I myself have and use two iwlxx devices. I have become convinced, because I have owned two different routers and traveled extensively with one iwlwifi laptop; thereby attaching to many different brands and types of routers, that the device is somewhat router dependent. I suggest you experiment with settings in the router. If yours offers channel width Auto, try 20 MHz only. If it offers Auto channel, try setting it on a fixed channel, 11, perhaps. If it offers 2.4 GHz or 5.8 GHz, try limiting it to 2.4. If it offers mixed mode B, G and N, try setting it to B and G only.

    If you find that magic combination of settings that fixes the issue, be sure to report so that all the rest of us can benefit from your experience.
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  9. #9
    Join Date
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    Distro
    Xubuntu 12.04 Precise Pangolin

    Re: Ubuntu 12.04 and Intel Centrino N-1000 Very slow network

    Any firmware errors?
    Code:
    egrep -i 'fw|firm' /var/log/syslog 
    dmesg | egrep 'iwl|[F]irm'
    You could update the firmware via:
    Code:
    wget de.archive.ubuntu.com/ubuntu/pool/main/l/linux-firmware/linux-firmware_1.116_all.deb
    sudo dpkg -i linux-firmware_1.116_all.deb
    and reboot.

    Of course, check also chili555's recommendations with your router settings.

  10. #10
    Join Date
    Dec 2013
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    Re: Ubuntu 12.04 and Intel Centrino N-1000 Very slow network

    I will try to change the router settings, but I don't think I can do that with all networks.

    egrep -i 'fw|firm' /var/log/syslog
    Code:
    Jan 13 12:46:02 shaldev-xps kernel: [    0.254985] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
    Jan 13 12:46:02 shaldev-xps kernel: [    8.519602] psmouse serio1: synaptics: Touchpad model: 1, fw: 7.4, id: 0x1e0b1, caps: 0xd04773/0xa40000/0x8a0400, board id: 3655, fw id: 662324
    Jan 13 12:46:02 shaldev-xps kernel: [    8.610828] iwlwifi 0000:04:00.0: loaded firmware version 39.31.5.1 build 35138
    Jan 13 12:46:02 shaldev-xps kernel: [    9.401596] [Firmware Bug]: ACPI(PEGP) defines _DOD but not _DOS
    Jan 13 12:46:05 shaldev-xps NetworkManager[950]: <info> monitoring kernel firmware directory '/lib/firmware'.
    Jan 13 12:57:59 shaldev-xps kernel: [    0.255937] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
    Jan 13 12:57:59 shaldev-xps kernel: [    8.535415] psmouse serio1: synaptics: Touchpad model: 1, fw: 7.4, id: 0x1e0b1, caps: 0xd04773/0xa40000/0x8a0400, board id: 3655, fw id: 662324
    Jan 13 12:57:59 shaldev-xps kernel: [    8.571617] iwlwifi 0000:04:00.0: loaded firmware version 39.31.5.1 build 35138
    Jan 13 12:57:59 shaldev-xps kernel: [    9.159227] [Firmware Bug]: ACPI(PEGP) defines _DOD but not _DOS
    Jan 13 12:58:04 shaldev-xps NetworkManager[968]: <info> monitoring kernel firmware directory '/lib/firmware'.
    Jan 13 13:16:53 shaldev-xps NetworkManager[968]: <info> kernel firmware directory '/lib/firmware' changed
    Jan 13 13:21:54 shaldev-xps NetworkManager[968]: <info> kernel firmware directory '/lib/firmware' changed
    Jan 13 13:23:59 shaldev-xps kernel: [    0.256480] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
    Jan 13 13:23:59 shaldev-xps kernel: [    8.579037] psmouse serio1: synaptics: Touchpad model: 1, fw: 7.4, id: 0x1e0b1, caps: 0xd04773/0xa40000/0x8a0400, board id: 3655, fw id: 662324
    Jan 13 13:23:59 shaldev-xps kernel: [    9.198354] iwlwifi 0000:04:00.0: loaded firmware version 39.31.5.1 build 35138
    Jan 13 13:23:59 shaldev-xps kernel: [    9.399284] [Firmware Bug]: ACPI(PEGP) defines _DOD but not _DOS
    Jan 13 13:24:02 shaldev-xps NetworkManager[961]: <info> monitoring kernel firmware directory '/lib/firmware'.
    Jan 13 13:36:43 shaldev-xps NetworkManager[961]: <info> kernel firmware directory '/lib/firmware' changed
    Jan 13 13:44:44 shaldev-xps kernel: [    0.255294] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
    Jan 13 13:44:44 shaldev-xps kernel: [    7.946617] psmouse serio1: synaptics: Touchpad model: 1, fw: 7.4, id: 0x1e0b1, caps: 0xd04773/0xa40000/0x8a0400, board id: 3655, fw id: 662324
    Jan 13 13:44:44 shaldev-xps kernel: [    8.045725] iwlwifi 0000:04:00.0: loaded firmware version 39.31.5.1 build 35138
    Jan 13 13:44:44 shaldev-xps kernel: [    9.120458] [Firmware Bug]: ACPI(PEGP) defines _DOD but not _DOS
    Jan 13 13:44:47 shaldev-xps NetworkManager[964]: <info> monitoring kernel firmware directory '/lib/firmware'.
    Jan 13 13:57:14 shaldev-xps kernel: [    0.255628] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
    Jan 13 13:57:14 shaldev-xps kernel: [    8.334091] iwlwifi 0000:04:00.0: loaded firmware version 39.31.5.1 build 35138
    Jan 13 13:57:14 shaldev-xps kernel: [    8.721552] psmouse serio1: synaptics: Touchpad model: 1, fw: 7.4, id: 0x1e0b1, caps: 0xd04773/0xa40000/0x8a0400, board id: 3655, fw id: 662324
    Jan 13 13:57:14 shaldev-xps kernel: [    9.198640] [Firmware Bug]: ACPI(PEGP) defines _DOD but not _DOS
    Jan 13 13:57:17 shaldev-xps NetworkManager[947]: <info> monitoring kernel firmware directory '/lib/firmware'.
    Jan 13 15:29:16 shaldev-xps kernel: [    0.255663] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
    Jan 13 15:29:16 shaldev-xps kernel: [    8.509757] psmouse serio1: synaptics: Touchpad model: 1, fw: 7.4, id: 0x1e0b1, caps: 0xd04773/0xa40000/0x8a0400, board id: 3655, fw id: 662324
    Jan 13 15:29:16 shaldev-xps kernel: [    8.820978] iwlwifi 0000:04:00.0: loaded firmware version 39.31.5.1 build 35138
    Jan 13 15:29:16 shaldev-xps kernel: [    9.207172] [Firmware Bug]: ACPI(PEGP) defines _DOD but not _DOS
    Jan 13 15:29:18 shaldev-xps NetworkManager[916]: <info> monitoring kernel firmware directory '/lib/firmware'.
    Jan 14 20:51:22 shaldev-xps kernel: [    0.255279] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
    Jan 14 20:51:22 shaldev-xps kernel: [    8.825120] psmouse serio1: synaptics: Touchpad model: 1, fw: 7.4, id: 0x1e0b1, caps: 0xd04773/0xa40000/0x8a0400, board id: 3655, fw id: 662324
    Jan 14 20:51:22 shaldev-xps kernel: [    8.840983] iwlwifi 0000:04:00.0: loaded firmware version 39.31.5.1 build 35138
    Jan 14 20:51:22 shaldev-xps kernel: [    9.338034] [Firmware Bug]: ACPI(PEGP) defines _DOD but not _DOS
    Jan 14 20:51:27 shaldev-xps NetworkManager[971]: <info> monitoring kernel firmware directory '/lib/firmware'.
    Jan 14 20:56:29 shaldev-xps NetworkManager[971]: <info> kernel firmware directory '/lib/firmware' changed
    Jan 14 20:58:16 shaldev-xps kernel: [    0.255263] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
    Jan 14 20:58:16 shaldev-xps kernel: [    9.073514] iwlwifi 0000:04:00.0: loaded firmware version 39.31.5.1 build 35138
    Jan 14 20:58:16 shaldev-xps kernel: [    9.351789] psmouse serio1: synaptics: Touchpad model: 1, fw: 7.4, id: 0x1e0b1, caps: 0xd04773/0xa40000/0x8a0400, board id: 3655, fw id: 662324
    Jan 14 20:58:16 shaldev-xps kernel: [   11.184538] [Firmware Bug]: ACPI(PEGP) defines _DOD but not _DOS
    Jan 14 20:58:19 shaldev-xps NetworkManager[938]: <info> monitoring kernel firmware directory '/lib/firmware'.
    Jan 14 21:16:22 shaldev-xps kernel: [    0.259467] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
    Jan 14 21:16:22 shaldev-xps kernel: [    9.250816] iwlwifi 0000:04:00.0: loaded firmware version 39.31.5.1 build 35138 op_mode iwldvm
    Jan 14 21:16:22 shaldev-xps kernel: [    9.448402] psmouse serio1: synaptics: Touchpad model: 1, fw: 7.4, id: 0x1e0b1, caps: 0xd04773/0xa40000/0x8a0400, board id: 3655, fw id: 662324
    Jan 14 21:16:23 shaldev-xps kernel: [   11.442234] [Firmware Bug]: ACPI(PEGP) defines _DOD but not _DOS
    Jan 14 21:16:25 shaldev-xps NetworkManager[949]: <info> monitoring kernel firmware directory '/lib/firmware'.
    dmesg | egrep 'iwl|[F]irm'
    Code:
    [    0.259467] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
    [    9.220541] iwlwifi 0000:04:00.0: irq 50 for MSI/MSI-X
    [    9.250816] iwlwifi 0000:04:00.0: loaded firmware version 39.31.5.1 build 35138 op_mode iwldvm
    [    9.883001] iwlwifi 0000:04:00.0: CPTCFG_IWLWIFI_DEBUG disabled
    [    9.883007] iwlwifi 0000:04:00.0: CPTCFG_IWLWIFI_DEBUGFS disabled
    [    9.883009] iwlwifi 0000:04:00.0: CPTCFG_IWLWIFI_DEVICE_TRACING disabled
    [    9.883012] iwlwifi 0000:04:00.0: Detected Intel(R) Centrino(R) Wireless-N 1000 BGN, REV=0x6C
    [    9.883113] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S
    [   10.086216] ieee80211 phy0: Selected rate control algorithm 'iwl-agn-rs'
    [   11.442234] [Firmware Bug]: ACPI(PEGP) defines _DOD but not _DOS
    [   14.003079] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S
    [   14.010449] iwlwifi 0000:04:00.0: Radio type=0x0-0x0-0x3
    [   14.044852] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S
    [   14.052247] iwlwifi 0000:04:00.0: Radio type=0x0-0x0-0x3
    [ 3580.711214] iwlwifi 0000:04:00.0: RF_KILL bit toggled to enable radio.
    [ 3584.107285] iwlwifi 0000:04:00.0: L1 Enabled; Disabling L0S
    [ 3584.114668] iwlwifi 0000:04:00.0: Radio type=0x0-0x0-0x3

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