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    #1

    [SOLVED] Inconsistent, VERY inconsistent, Internet connection speeds

    I have two laptops sitting right in front of me, connected via wireless to the same router in the next room. My first laptop is an Asus Q500a with a Centrino Wireless -N 2230. Is getting about 30Mbs down. My Acer with a Qualcomm Atheros QCA6174 is all over the board but mostly around 3Mbs down. (every once in a while it jumps to 60-70Mbs down but mostly it starts in the teens and slows down to about 3Mbs.

    They are both i7 (Asus generation 3 and Acer generation 4)

    Any suggestions as to what's happening with the slower Acer and how to fix it?

    Code:
    [SIZE=+1][FONT=Ubuntu]*-network
                          description: Wireless interface
                          product: Centrino Wireless-N 2230
                          vendor: Intel Corporation
                          physical id: 0
                          bus info: pci@0000:02:00.0
                          logical name: wlp2s0
                          version: c4
                          serial: XXXXXXXXXX
                          width: 64 bits
                          clock: 33MHz
                          capabilities: bus_master cap_list ethernet             physical wireless
                          configuration: broadcast=yes driver=iwlwifi             driverversion=4.13.0-45-generic firmware=18.168.6.1             ip=10.0.0.63 latency=0 link=yes multicast=yes wireless=IEEE             802.11
                          resources: irq:29 memory:f7c00000-f7c01fff
        [/FONT][/SIZE]
    My other laptop is an Acer Aspire V17 Nitro running Kubuntu 18.04 and it has:

    Code:
    *-network
              description: Wireless interface
              product: QCA6174 802.11ac Wireless Network Adapter
              vendor: Qualcomm Atheros
              physical id: 0
              bus info: pci@0000:07:00.0
              logical name: wlp7s0
              version: 20
              serial: XXXXXXXXXXX
              width: 64 bits
              clock: 33MHz
              capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
              configuration: broadcast=yes driver=ath10k_pci driverversion=4.15.0-23-generic
    If you think Education is expensive, try ignorance.

    The difference between genius and stupidity is genius has limits.
    Tags: None
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    #2
    I had a similar problem with the ath9k driver. For yours, modinfo gives:
    ~$ modinfo ath10k_pci
    filename: /lib/modules/4.13.0-45-generic/kernel/drivers/net/wireless/ath/ath10k/ath10k_pci.ko
    firmware: ath10k/QCA9377/hw1.0/board.bin
    firmware: ath10k/QCA9377/hw1.0/firmware-5.bin
    firmware: ath10k/QCA6174/hw3.0/board-2.bin
    firmware: ath10k/QCA6174/hw3.0/board.bin
    firmware: ath10k/QCA6174/hw3.0/firmware-6.bin
    firmware: ath10k/QCA6174/hw3.0/firmware-5.bin
    firmware: ath10k/QCA6174/hw3.0/firmware-4.bin
    firmware: ath10k/QCA6174/hw2.1/board-2.bin
    firmware: ath10k/QCA6174/hw2.1/board.bin
    firmware: ath10k/QCA6174/hw2.1/firmware-5.bin
    firmware: ath10k/QCA6174/hw2.1/firmware-4.bin
    firmware: ath10k/QCA9887/hw1.0/board-2.bin
    firmware: ath10k/QCA9887/hw1.0/board.bin
    firmware: ath10k/QCA9887/hw1.0/firmware-5.bin
    firmware: ath10k/QCA988X/hw2.0/board-2.bin
    firmware: ath10k/QCA988X/hw2.0/board.bin
    firmware: ath10k/QCA988X/hw2.0/firmware-5.bin
    firmware: ath10k/QCA988X/hw2.0/firmware-4.bin
    firmware: ath10k/QCA988X/hw2.0/firmware-3.bin
    firmware: ath10k/QCA988X/hw2.0/firmware-2.bin
    license: Dual BSD/GPL
    description: Driver support for Qualcomm Atheros 802.11ac WLAN PCIe/AHB devices
    author: Qualcomm Atheros
    srcversion: 8D7A52EE462CD73D0445DB2
    alias: pci:v0000168Cd00000050sv*sd*bc*sc*i*
    alias: pci:v0000168Cd00000042sv*sd*bc*sc*i*
    alias: pci:v0000168Cd00000046sv*sd*bc*sc*i*
    alias: pci:v0000168Cd00000056sv*sd*bc*sc*i*
    alias: pci:v0000168Cd00000040sv*sd*bc*sc*i*
    alias: pci:v0000168Cd0000003Esv*sd*bc*sc*i*
    alias: pci:v0000168Cd00000041sv*sd*bc*sc*i*
    alias: pci:v0000168Cd0000003Csv*sd*bc*sc*i*
    depends: ath10k_core
    intree: Y
    name: ath10k_pci
    vermagic: 4.13.0-45-generic SMP mod_unload
    parm: irq_mode:0: auto, 1: legacy, 2: msi (default: 0) (uint)
    parm: reset_mode:0: auto, 1: warm only (default: 0) (uint)
    Unfortunately, the parm offer only two adjustments, neither of which seem to relate to your problem. You could try changing the irq_mode to 1 (legacy).

    sudo rmmod -v ath10k_pci
    sudo modprobe -v ath10k_pci irq_mode=1

    Then log back onto your wifi.

    iwlwifi, on the other hand, has a forest of parm's to possible adjust:
    :~$ modinfo iwlwifi
    filename: /lib/modules/4.13.0-45-generic/kernel/drivers/net/wireless/intel/iwlwifi/iwlwifi.ko
    license: GPL
    author: Copyright(c) 2003- 2015 Intel Corporation <linuxwifi@intel.com>
    description: Intel(R) Wireless WiFi driver for Linux
    firmware: iwlwifi-100-5.ucode
    firmware: iwlwifi-1000-5.ucode
    firmware: iwlwifi-135-6.ucode
    firmware: iwlwifi-105-6.ucode
    firmware: iwlwifi-2030-6.ucode
    firmware: iwlwifi-2000-6.ucode
    firmware: iwlwifi-5150-2.ucode
    firmware: iwlwifi-5000-5.ucode
    firmware: iwlwifi-6000g2b-6.ucode
    firmware: iwlwifi-6000g2a-6.ucode
    firmware: iwlwifi-6050-5.ucode
    firmware: iwlwifi-6000-6.ucode
    firmware: iwlwifi-7265D-29.ucode
    firmware: iwlwifi-7265-17.ucode
    firmware: iwlwifi-3168-29.ucode
    firmware: iwlwifi-3160-17.ucode
    firmware: iwlwifi-7260-17.ucode
    firmware: iwlwifi-8265-33.ucode
    firmware: iwlwifi-8000C-33.ucode
    firmware: iwlwifi-9260-th-b0-jf-b0--33.ucode
    firmware: iwlwifi-9260-th-a0-jf-a0--33.ucode
    firmware: iwlwifi-9000-pu-a0-jf-b0--33.ucode
    firmware: iwlwifi-9000-pu-a0-jf-a0--33.ucode
    firmware: iwlwifi-Qu-a0-jf-b0--33.ucode
    firmware: iwlwifi-Qu-a0-hr-a0--33.ucode
    srcversion: 339D7D3BD0DD2A9C7FE616F
    alias: pci:v00008086d00002720sv*sd00001080bc*sc*i*
    alias: pci:v00008086d00002720sv*sd00000070bc*sc*i*
    ...
    alias: pci:v00008086d00004232sv*sd00001204bc*sc*i*
    alias: pci:v00008086d00004232sv*sd00001301bc*sc*i*
    alias: pci:v00008086d00004232sv*sd00001201bc*sc*i*
    depends: cfg80211
    intree: Y
    name: iwlwifi
    vermagic: 4.13.0-45-generic SMP mod_unload
    parm: swcrypto:using crypto in software (default 0 [hardware]) (int)
    parm: 11n_disable:disable 11n functionality, bitmap: 1: full, 2: disable agg TX, 4: disable agg RX, 8 enable agg TX (uint)
    parm: amsdu_size:amsdu size 0: 12K for multi Rx queue devices, 4K for other devices 1:4K 2:8K 3:12K (default 0) (int)
    parm: fw_restart:restart firmware in case of error (default true) (bool)
    parm: antenna_coupling:specify antenna coupling in dB (default: 0 dB) (int)
    parm: nvm_file:NVM file name (charp)
    parm: d0i3_disable:disable d0i3 functionality (default: Y) (bool)
    parm: lar_disable:disable LAR functionality (default: N) (bool)
    parm: uapsd_disable:disable U-APSD functionality bitmap 1: BSS 2: P2P Client (default: 3) (uint)
    parm: bt_coex_active:enable wifi/bt co-exist (default: enable) (bool)
    parm: led_mode:0=system default, 1=On(RF On)/Off(RF Off), 2=blinking, 3=Off (default: 0) (int)
    parm: power_save:enable WiFi power management (default: disable) (bool)
    parm: power_level:default power save level (range from 1 - 5, default: 1) (int)
    parm: fw_monitor:firmware monitor - to debug FW (default: false - needs lots of memory) (bool)
    parm: d0i3_timeout:Timeout to D0i3 entry when idle (ms) (uint)
    parm: disable_11acisable VHT capabilities (default: false) (bool)
    https://wiki.archlinux.org/index.php/Kernel_module

    Suggested possible changes include "antenna_coupling", "bt_coex_active" and "power_save".

    You can create a text file in /etc/modprobe.d/ titled "iwlwifi.conf".
    In it you can place
    options iwlwifi power_save=disable
    options iwlwifi bt_coex_active=disable
    "A nation that is afraid to let its people judge the truth and falsehood in an open market is a nation that is afraid of its people.”
    – John F. Kennedy, February 26, 1962.
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      #3
      Do you use a wireless mouse with the Acer? Some of them have a design fault in that the wifi antenna is too close to one of the USB ports, and the signals interfere. There's a newish laptop I support that is a dog with the dongle plugged in on the right.

      Regards, John Little
      Regards, John Little
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        #4
        Originally posted by jlittle View Post
        Do you use a wireless mouse with the Acer? Some of them have a design fault in that the wifi antenna is too close to one of the USB ports, and the signals interfere. There's a newish laptop I support that is a dog with the dongle plugged in on the right.

        Regards, John Little
        Interesting concept. I have switched to my Asus for the time being as the speeds were driving me to dark places. But I will definitely give it a try.

        Thanks.
        If you think Education is expensive, try ignorance.

        The difference between genius and stupidity is genius has limits.
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        Comment

          #5
          Originally posted by GreyGeek View Post
          I had a similar problem with the ath9k driver. For yours, modinfo gives:

          Unfortunately, the parm offer only two adjustments, neither of which seem to relate to your problem. You could try changing the irq_mode to 1 (legacy).

          sudo rmmod -v ath10k_pci
          sudo modprobe -v ath10k_pci irq_mode=1

          Then log back onto your wifi.

          iwlwifi, on the other hand, has a forest of parm's to possible adjust:

          https://wiki.archlinux.org/index.php/Kernel_module

          Suggested possible changes include "antenna_coupling", "bt_coex_active" and "power_save".

          You can create a text file in /etc/modprobe.d/ titled "iwlwifi.conf".
          In it you can place
          options iwlwifi power_save=disable
          options iwlwifi bt_coex_active=disable
          Apparently I already had the file. I first commented out what was there (as Dolphin would not let me rename it), that had no affect so I added the two lines you suggested and no luck there either.

          Thanks,
          If you think Education is expensive, try ignorance.

          The difference between genius and stupidity is genius has limits.
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            #6
            Originally posted by jlittle View Post
            Do you use a wireless mouse with the Acer? Some of them have a design fault in that the wifi antenna is too close to one of the USB ports, and the signals interfere. There's a newish laptop I support that is a dog with the dongle plugged in on the right.

            Regards, John Little
            Ok, try this on for size. I fired up the Acer and tried switching the mouse dongle from one side of the laptop to the other (also from a 2.0 USB to 3.0 USB). No change, maybe even a little worse. So I thought, try it with the mouse not connected at all... lo and behold, I'm suddenly getting speeds @80Mbs. I'm a happy camper. I call my son in to show him I found the solution and I decide to make it a visual demonstration and I plugged the wireless mouse back in to its usual port and son of a witch, I'm getting the same high speeds! My son says this house haunts computers.

            SpecialEDit: I don't know what the fluke was but it's definitely the mouse. I just hit 96.9Mbs on a speedtest. On my Asus I've been getting around 20, sometimes 30Mbs for the last year. (I guess I should have tested the Asus without the mouse when I had it up and running).
            Attached Files
            Last edited by SpecialEd; Jun 15, 2018, 04:12 PM.
            If you think Education is expensive, try ignorance.

            The difference between genius and stupidity is genius has limits.
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              #7
              Solved. It seems so obvious in hindsight. Special thanks to jlittle.
              If you think Education is expensive, try ignorance.

              The difference between genius and stupidity is genius has limits.
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