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Thread: Wifi 8X slower in Ubuntu than Windows 10 (Atheros 802.11AC)

  1. #1
    Join Date
    Feb 2016
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    21

    Wifi 8X slower in Ubuntu than Windows 10 (Atheros 802.11AC)

    iPerf3 tests to a LAN server result in 8X slower speeds in Ubuntu than in Windows 10.

    Code:
    ~$ uname -a
    
    Linux CQF-MSI 4.13.0-37-generic #42~16.04.1-Ubuntu SMP Wed Mar 7 16:03:28 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
    Code:
    lspci | awk '/[Nn]et/ {print $1}' | xargs -i% lspci -ks %
    
    04:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter (rev 20)
    Subsystem: Bigfoot Networks, Inc. Killer N1525 Wireless-AC
    Kernel driver in use: ath10k_pci
    Kernel modules: ath10k_pci

    Windows 10 iPerf3 tests:



    Ubuntu Mate:




    Ubuntu setup is 8X crappier than the first crap. What gives.

  2. #2
    Join Date
    Aug 2011
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    Berlin, Germany
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    7,965
    Distro
    Ubuntu Mate 20.04 Focal Fossa

    Re: Wifi 8X slower in Ubuntu than Windows 10 (Atheros 802.11AC)

    Please check
    Code:
    sudo modprobe -rfv ath10k_pci
    sudo modprobe -v ath10k_pci nohwcrypt=1

  3. #3
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    Feb 2016
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    Re: Wifi 8X slower in Ubuntu than Windows 10 (Atheros 802.11AC)

    Quote Originally Posted by praseodym View Post
    Please check
    Code:
    sudo modprobe -rfv ath10k_pci
    sudo modprobe -v ath10k_pci nohwcrypt=1

    here's the output:

    Code:
    rmmod ath10k_pcirmmod ath10k_core
    rmmod mac80211
    rmmod ath
    rmmod cfg80211


    Code:
    henry@CQF-MSI:~$ sudo modprobe -v ath10k_pci nohwcrypt=1
    insmod /lib/modules/4.13.0-37-generic/kernel/net/wireless/cfg80211.ko 
    insmod /lib/modules/4.13.0-37-generic/kernel/net/mac80211/mac80211.ko 
    insmod /lib/modules/4.13.0-37-generic/kernel/drivers/net/wireless/ath/ath.ko 
    insmod /lib/modules/4.13.0-37-generic/kernel/drivers/net/wireless/ath/ath10k/ath10k_core.ko 
    insmod /lib/modules/4.13.0-37-generic/kernel/drivers/net/wireless/ath/ath10k/ath10k_pci.ko nohwcrypt=1
    Seems like the Ubuntu driver of this AC wireless card is awful. :/

  4. #4
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    Re: Wifi 8X slower in Ubuntu than Windows 10 (Atheros 802.11AC)

    I will run the speed tests tonight after remove/reinstalling as you suggested and post the results.

    Thanks

  5. #5
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    Re: Wifi 8X slower in Ubuntu than Windows 10 (Atheros 802.11AC)

    Quote Originally Posted by praseodym View Post
    Please check
    Code:
    sudo modprobe -rfv ath10k_pci
    sudo modprobe -v ath10k_pci nohwcrypt=1


    The top is 2.4Ghz, the top is 5Ghz. As bad or even worse. ;(

    How do I reverse the modprobe command?



  6. #6
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    Ubuntu 20.04 Focal Fossa

    Re: Wifi 8X slower in Ubuntu than Windows 10 (Atheros 802.11AC)

    Just Reboot.

  7. #7
    Join Date
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    Ubuntu Mate 20.04 Focal Fossa

    Re: Wifi 8X slower in Ubuntu than Windows 10 (Atheros 802.11AC)

    Try updating the firmware:

    Code:
    sudo apt-get install git
    git clone git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git
    cd linux-firmware
    sudo cp -r * /lib/firmware
    Reboot

  8. #8
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    Feb 2016
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    Re: Wifi 8X slower in Ubuntu than Windows 10 (Atheros 802.11AC)

    Quote Originally Posted by praseodym View Post
    Try updating the firmware:

    Code:
    sudo apt-get install git
    git clone git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git
    cd linux-firmware
    sudo cp -r * /lib/firmware
    Reboot
    I'll give it a shot...

    Before I do, look at this:

    First image = a VM machine running FreeBSD: 290MBits average
    Second image = Ubuntu Mate 16.04.1: 6.97 MBits average....






    And now Ubuntu's awfulperformance:



    Wow...

  9. #9
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    Feb 2016
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    Re: Wifi 8X slower in Ubuntu than Windows 10 (Atheros 802.11AC)

    No change. After updating firmware still averaging 7Mbits.


    Ugh

  10. #10
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    Re: Wifi 8X slower in Ubuntu than Windows 10 (Atheros 802.11AC)

    FreeBSD gives me 300Mbps while Ubuntu 7? wth.


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