Intel Wifi 5100 + Mint 19 , slow wifi speed.

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sitcom
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Intel Wifi 5100 + Mint 19 , slow wifi speed.

Post by sitcom » Sat Oct 06, 2018 12:44 pm

Hello , running Mint 19 on a old Vaio vgn-fw11s laptop which is equipped with an Intel Wifi link 5100 nic.

Speedtests should show around 30 Mbps Down and about 5 Mbps Up(tested with my Samsung S8 plus) but instead i get 10-12 Mbps Down . I do not have problems with my up speed as it gets up to 5 Mbps as it should.


So my problem is the Down speed in my system ,

Any thoughts ?

Code: Select all

iwconfig
enp8s0    no wireless extensions.

lo        no wireless extensions.

wlp6s0    IEEE 802.11  ESSID:"Universe"  
          Mode:Managed  Frequency:2.452 GHz  Access Point: 50:6A:03:BC:12:57   
          Bit Rate=65 Mb/s   Tx-Power=15 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:on
          Link Quality=70/70  Signal level=-35 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:138   Missed beacon:0

JeremyB
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Posts: 9296
Joined: Fri Feb 21, 2014 8:17 am

Re: Intel Wifi 5100 + Mint 19 , slow wifi speed.

Post by JeremyB » Sat Oct 06, 2018 1:14 pm

In terminal do

Code: Select all

sudo sed -i 's/3/2/' /etc/NetworkManager/conf.d/*
Reboot

sitcom
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Joined: Sat Oct 06, 2018 12:37 pm

Re: Intel Wifi 5100 + Mint 19 , slow wifi speed.

Post by sitcom » Sat Oct 06, 2018 1:45 pm

Hey Jeremy , thanks for your suggestion , unfortunately it did not help , still same speeds .


edit reason : typo

JeremyB
Level 19
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Posts: 9296
Joined: Fri Feb 21, 2014 8:17 am

Re: Intel Wifi 5100 + Mint 19 , slow wifi speed.

Post by JeremyB » Sat Oct 06, 2018 1:52 pm

What is result for

Code: Select all

grep [[:alnum:]] /sys/module/iwlwifi/parameters/*

sitcom
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Re: Intel Wifi 5100 + Mint 19 , slow wifi speed.

Post by sitcom » Sat Oct 06, 2018 2:06 pm

Here you go !

Code: Select all

grep [[:alnum:]] /sys/module/iwlwifi/parameters/*
/sys/module/iwlwifi/parameters/11n_disable:0
/sys/module/iwlwifi/parameters/amsdu_size:0
/sys/module/iwlwifi/parameters/antenna_coupling:0
/sys/module/iwlwifi/parameters/bt_coex_active:Y
/sys/module/iwlwifi/parameters/d0i3_disable:Y
/sys/module/iwlwifi/parameters/d0i3_timeout:1000
/sys/module/iwlwifi/parameters/disable_11ac:N
/sys/module/iwlwifi/parameters/fw_monitor:N
/sys/module/iwlwifi/parameters/fw_restart:Y
/sys/module/iwlwifi/parameters/lar_disable:N
/sys/module/iwlwifi/parameters/led_mode:0
/sys/module/iwlwifi/parameters/nvm_file:(null)
/sys/module/iwlwifi/parameters/power_level:0
/sys/module/iwlwifi/parameters/power_save:N
/sys/module/iwlwifi/parameters/swcrypto:0
/sys/module/iwlwifi/parameters/uapsd_disable:3

JeremyB
Level 19
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Posts: 9296
Joined: Fri Feb 21, 2014 8:17 am

Re: Intel Wifi 5100 + Mint 19 , slow wifi speed.

Post by JeremyB » Sat Oct 06, 2018 3:24 pm

See if the speed improves after

Code: Select all

sudo modprobe -r iwlwifi && sleep 10 && sudo modprobe iwlwifi 11n_disable=8
The 11n_disable=8 actually enables aggressive TX on the card and should help

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