Linux Mint 18.2 KDE 64 bit slow wifi (SOLVED)

[I love Linux]

Upgraded from Linux Mint 17.3 KDE 64 bit to Linux Mint 18.2 KDE 64 bit. Did a clean install and having a problem with wifi download speed. Used several speed test web sites and only getting about 25 Mbps or slower. The speed test will start at about 35 Mbps then slows down fast. Was getting about 60 Mbps download speed on Linux Mint 17.3 KDE. Get the same download speed when running the live Linux Mint 18.2 KDE DVD. Verified my computer wifi was ok by running Puppy Linux from USB drive and get about 60 to 70 Mbps download speed. Updated the iwlwifi driver from intel to the latest version and made no difference. Installed newer version of kernel 4.10.0-32.36-16.04 but it made wifi download speed slower to 2 to 4 Mbps . Info about my computer wifi is below.

scott@scott-HP-EliteBook-8560p ~ $ inxi -nz
Network: Card-1: Intel 82579LM Gigabit Network Connection driver: e1000e
IF: enp0s25 state: down mac: <filter>
Card-2: Intel Centrino Advanced-N 6205 [Taylor Peak] driver: iwlwifi
IF: wlo1 state: up mac: <filter>

[JeremyB]

Try this

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sudo sed -i 's/wifi.powersave = 3/wifi.powersave = 2/' /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf

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systemctl restart network-manager.service

It will keep Network Manager from enabling wifi power save and it really helps with Intel wifi

[I love Linux]

I tried the command to turn wifi powersave to 2 but the download speed is the same. Verified wifi power management was turned off with iwconfig.

[JeremyB]

Lets try enabling aggressive tx in the kernel module parameters

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echo "options iwlwifi 11n_disable=8" | sudo tee /etc/modprobe.d/iwlopts.conf

Reboot

[I love Linux]

Than did the trick! I now get 60 to 70 Mbps download speed. Thank you.

[JeremyB]

Glad it worked, when you have decided to consider this solved, please edit the Subject in the original post to add SOLVED so it might help others looking for a solution

[I love Linux]

How do i edit the subject to say SOLVED?

[Penthor]

I know this is an old thread, but I just wanted to comment that the code that JeremyB suggested to turn off power management also enabled my Intel Centrino Advanced-N 6205 wireless card. Thanks Jeremy.