Perbaiki wifi connection di manjaro linux

modprobe iwlwifi 11n_disable=1 swcrypto=1 

or, to make it permanent, create a file /etc/modprobe.d/iwlwifi.conf containing

#/etc/modprobe.d/iwlwifi.conf
options iwlwifi 11n_disable=1 swcrypto=1

Adding ipv6.disable=1 to the kernel line disables the whole IPv6 stack, which is likely what you want if you are experiencing issues. See Kernel parameters for more information.
Alternatively, adding ipv6.disable_ipv6=1 instead will keep the IPv6 stack functional but will not assign IPv6 addresses to any of your network devices.
One can also avoid assigning IPv6 addresses to specific network interfaces by adding the following sysctl config to /etc/sysctl.d/40-ipv6.conf:

# Disable IPv6
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.nic0.disable_ipv6 = 1
...
net.ipv6.conf.nicN.disable_ipv6 = 1