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Thread: Wireless N 300Mbps missing in Ubuntu

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  1. #1
    Join Date
    Feb 2011
    Beans
    78

    Wireless N 300Mbps missing in Ubuntu

    Dear All,

    I have very odd problem. First of all my setup :
    WiFi router - mikrotik 2011uas-2hnd-in;
    Client 1 - Ubuntu 14.04 with Network controller: Intel Corporation Centrino Wireless-N 1000 [Condor Peak]
    Client 2 - Windows 7 with Network controller: Intel Corporation Centrino Wireless-N 1000 [Condor Peak]

    The problem is that windows client is linking to the router with 300Mbps and Linux client is linking with max of 150 Mbps. I'm pretty sure that router is right configured.
    Also tried Client 1 with windows setup and guess what... it's linking with 300Mbps. So my guess is that something wrong going on with Ubuntu. Tried the mainline kernel (3.14.5) and default 3.13.0-27-generic, still no change.


    Here is some useful output from Ubuntu :
    Code:
     grep -iR [a-z0-9] /sys/module/iwlwifi/parameters/
    /sys/module/iwlwifi/parameters/nvm_file:(null)
    /sys/module/iwlwifi/parameters/swcrypto:0
    /sys/module/iwlwifi/parameters/power_save:N
    /sys/module/iwlwifi/parameters/led_mode:0
    /sys/module/iwlwifi/parameters/amsdu_size_8K:0
    /sys/module/iwlwifi/parameters/fw_restart:Y
    /sys/module/iwlwifi/parameters/bt_coex_active:Y
    /sys/module/iwlwifi/parameters/11n_disable:0
    /sys/module/iwlwifi/parameters/antenna_coupling:0
    /sys/module/iwlwifi/parameters/wd_disable:1
    /sys/module/iwlwifi/parameters/power_level:0
    
    
    
    iw list
    Wiphy phy0
        Band 1:
            Capabilities: 0x1072
                HT20/HT40
                Static SM Power Save
                RX Greenfield
                RX HT20 SGI
                RX HT40 SGI
                No RX STBC
                Max AMSDU length: 3839 bytes
                DSSS/CCK HT40
            Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
            Minimum RX AMPDU time spacing: 4 usec (0x05)
            HT RX MCS rate indexes supported: 0-15, 32
            TX unequal modulation not supported
            HT TX Max spatial streams: 1
            HT TX MCS rate indexes supported may differ
            Frequencies:
                * 2412 MHz [1] (14.0 dBm)
                * 2417 MHz [2] (14.0 dBm)
                * 2422 MHz [3] (14.0 dBm)
                * 2427 MHz [4] (14.0 dBm)
                * 2432 MHz [5] (14.0 dBm)
                * 2437 MHz [6] (14.0 dBm)
                * 2442 MHz [7] (14.0 dBm)
                * 2447 MHz [8] (14.0 dBm)
                * 2452 MHz [9] (14.0 dBm)
                * 2457 MHz [10] (14.0 dBm)
                * 2462 MHz [11] (14.0 dBm)
                * 2467 MHz [12] (14.0 dBm) (passive scanning, no IBSS)
                * 2472 MHz [13] (14.0 dBm) (passive scanning, no IBSS)
            Bitrates (non-HT):
                * 1.0 Mbps
                * 2.0 Mbps (short preamble supported)
                * 5.5 Mbps (short preamble supported)
                * 11.0 Mbps (short preamble supported)
                * 6.0 Mbps
                * 9.0 Mbps
                * 12.0 Mbps
                * 18.0 Mbps
                * 24.0 Mbps
                * 36.0 Mbps
                * 48.0 Mbps
                * 54.0 Mbps
        max # scan SSIDs: 20
        max scan IEs length: 195 bytes
        Coverage class: 0 (up to 0m)
        Supported Ciphers:
            * WEP40 (00-0f-ac:1)
            * WEP104 (00-0f-ac:5)
            * TKIP (00-0f-ac:2)
            * CCMP (00-0f-ac:4)
        Available Antennas: TX 0 RX 0
        Supported interface modes:
             * IBSS
             * managed
             * monitor
        software interface modes (can always be added):
             * monitor
        interface combinations are not supported
        Supported commands:
             * new_interface
             * set_interface
             * new_key
             * new_beacon
             * new_station
             * new_mpath
             * set_mesh_params
             * set_bss
             * authenticate
             * associate
             * deauthenticate
             * disassociate
             * join_ibss
             * join_mesh
             * set_tx_bitrate_mask
             * action
             * frame_wait_cancel
             * set_wiphy_netns
             * set_channel
             * set_wds_peer
             * Unknown command (84)
             * Unknown command (87)
             * Unknown command (85)
             * Unknown command (89)
             * Unknown command (92)
             * Unknown command (104)
             * testmode
             * connect
             * disconnect
        Supported TX frame types:
             * IBSS: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
             * managed: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
             * AP: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
             * AP/VLAN: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
             * mesh point: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
             * P2P-client: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
             * P2P-GO: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
             * Unknown mode (10): 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
        Supported RX frame types:
             * IBSS: 0x40 0xb0 0xc0 0xd0
             * managed: 0x40 0xd0
             * AP: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
             * AP/VLAN: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
             * mesh point: 0xb0 0xc0 0xd0
             * P2P-client: 0x40 0xd0
             * P2P-GO: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
             * Unknown mode (10): 0x40 0xd0
        Device supports RSN-IBSS.
        HT Capability overrides:
             * MCS: ff ff ff ff ff ff ff ff ff ff
             * maximum A-MSDU length
             * supported channel width
             * short GI for 40 MHz
             * max A-MPDU length exponent
             * min MPDU start spacing
        Device supports TX status socket option.
        Device supports HT-IBSS.
    
    iw dev wlan0 link
    Connected to d4:ca:6d:e6:18:a3 (on wlan0)
        SSID: CvetyBaby
        freq: 2422
        RX: 113048205 bytes (122363 packets)
        TX: 67479855 bytes (74096 packets)
        signal: -35 dBm
        tx bitrate: 150.0 MBit/s MCS 7 40Mhz short GI
    
        bss flags:    short-preamble short-slot-time
        dtim period:    0
        beacon int:    100
    
    When i try to set MCS index to 15 with:
    Code:
    
    # iw dev wlan0 set bitrates mcs-2.4 15
    
    It's showing : tx bitrate: 1MBit/s


    Can you help me to figure it out? Thank you in advance!

    Best Regards,
    Presian
    Last edited by pressko; June 5th, 2014 at 07:27 AM.

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