I got slow speeds after entering the fix for "Wifi cutting out" so I
then entered the following codes to fix "the slow speeds"

$ sudo rmmod -f iwlagn

$ sudo modprobe iwlagn 11n_disable=1

$ sudo su

# echo "options iwlagn 11n_disable=1" >> /etc/modprobe.d/iwlagn-
disable11n.conf

$ sudo su

# echo "#disable ipv6" >> /etc/sysctl.conf

# echo "net.ipv6.conf.all.disable_ipv6 = 1" >> /etc/sysctl.conf

# echo "net.ipv6.conf.default.disable_ipv6 = 1" >> /etc/sysctl.conf

# echo "net.ipv6.conf.lo.disable_ipv6 = 1" >> /etc/sysctl.conf

enter the codes above to fix the slow speeds

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https://bugs.launchpad.net/bugs/1214588

Title:
  Wifi stops working after a while

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