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Thread: Slow download speed using Centrino Wireless-N 1030 with Ubuntu 12.04

  1. #41
    Join Date
    Apr 2013
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    Re: Slow download speed using Centrino Wireless-N 1030 with Ubuntu 12.04

    Hi Chili,

    I switched UPnP off as advised, i couldn't find any reference to QoS in the Router settings however!

    Here's the output from dmesg | grep 80211

    ubuntu@ubuntu-Dell-System-XPS-L502X:~$ dmesg | grep 80211
    [ 20.362773] cfg80211: Calling CRDA to update world regulatory domain
    [ 20.571405] cfg80211: World regulatory domain updated:
    [ 20.571408] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
    [ 20.571411] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    [ 20.571413] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
    [ 20.571416] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
    [ 20.571418] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    [ 20.571420] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    [ 20.623315] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
    [ 20.625441] ieee80211 phy0: Selected rate control algorithm 'iwl-agn-rs'
    [31455.702135] cfg80211: All devices are disconnected, going to restore regulatory settings
    [31455.702147] cfg80211: Restoring regulatory settings
    [31455.702158] cfg80211: Calling CRDA to update world regulatory domain
    [31455.711344] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
    [31455.711347] cfg80211: World regulatory domain updated:
    [31455.711348] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
    [31455.711350] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    [31455.711352] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
    [31455.711353] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
    [31455.711354] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    [31455.711356] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    [61768.018957] cfg80211: All devices are disconnected, going to restore regulatory settings
    [61768.018969] cfg80211: Restoring regulatory settings
    [61768.019009] cfg80211: Calling CRDA to update world regulatory domain
    [61768.027058] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
    [61768.027066] cfg80211: World regulatory domain updated:
    [61768.027070] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
    [61768.027075] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    [61768.027080] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
    [61768.027085] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
    [61768.027089] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    [61768.027094] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    [70859.284170] cfg80211: All devices are disconnected, going to restore regulatory settings
    [70859.284184] cfg80211: Restoring regulatory settings
    [70859.284202] cfg80211: Calling CRDA to update world regulatory domain
    [70859.294444] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
    [70859.294447] cfg80211: World regulatory domain updated:
    [70859.294448] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
    [70859.294449] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    [70859.294451] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
    [70859.294453] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
    [70859.294454] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    [70859.294455] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    [80575.717812] cfg80211: All devices are disconnected, going to restore regulatory settings
    [80575.717827] cfg80211: Restoring regulatory settings
    [80575.717845] cfg80211: Calling CRDA to update world regulatory domain
    [80575.728596] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
    [80575.728606] cfg80211: World regulatory domain updated:
    [80575.728610] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
    [80575.728617] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    [80575.728624] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
    [80575.728630] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
    [80575.728636] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    [80575.728641] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    ubuntu@ubuntu-Dell-System-XPS-L502X:~$

  2. #42
    Join Date
    Aug 2005
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    Re: Slow download speed using Centrino Wireless-N 1030 with Ubuntu 12.04

    Looks awesome to me. It looks like you could also turn off N speeds in the router, unless you need it for other devices on the network.
    cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  3. #43
    Join Date
    Apr 2013
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    Re: Slow download speed using Centrino Wireless-N 1030 with Ubuntu 12.04

    Thanks Chii,

    What does 'cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)' tell us ?

    Interestingly last week i was downloading at 120 Kib/s and this last few days it's dropped to 80 Kib/s.

  4. #44
    Join Date
    Apr 2013
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    Re: Slow download speed using Centrino Wireless-N 1030 with Ubuntu 12.04

    Sorry Chili, but what's N speeds? I can't find any reference to that in the router settings.

    Thanks

  5. #45
    Join Date
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    Re: Slow download speed using Centrino Wireless-N 1030 with Ubuntu 12.04

    It tells us that the router and the driver want to use the 5kHz band; i.e. N speeds if possible. N speeds have been very troublesome for the iwlwifi driver for some time. Often, Intel devices will connect but refuse to pass traffic unless N is disabled.

    In my own case, my ancient, stone-age WRT54G with dd-wrt firmware, isn't even capable of N speeds and my iwlwifi device works just perfectly. Of course, I also can't stream high definition video without N, but, in my opinion, a laptop is a pretty poor way to watch a movie. But, hey, that's just me.

    End rant.
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  6. #46
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    Re: Slow download speed using Centrino Wireless-N 1030 with Ubuntu 12.04

    Thanks Chili,

    It's a shame Linux isn't the norm instead Windows (one day maybe!).

    Could you let me know how to disable the N speeds please?

  7. #47
    Join Date
    Apr 2013
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    Re: Slow download speed using Centrino Wireless-N 1030 with Ubuntu 12.04

    Is it the 'g only' setting ?

  8. #48
    Join Date
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    Re: Slow download speed using Centrino Wireless-N 1030 with Ubuntu 12.04

    In the router, it's probably the B and G only setting. To disable it in the driver, do this: http://ubuntuforums.org/showthread.p...0#post12594190
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  9. #49
    Join Date
    Nov 2013
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    Re: Slow download speed using Centrino Wireless-N 1030 with Ubuntu 12.04

    Thanks to this thread. I followed WildMan's instructions on the first page and my connections are not dropping off anymore.

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