Problems

Cannot boot - GDM won't show

Boot asks for a disc encryption psw and proceeds to graphical interface but hangs before displaying GDM (showing black screen and empty cursor).

Solution

Run sudo systemctl edit gdm and add following between the comments

[Service]

Type=idle

Note

Adding i915 driver (even if it is normally loaded) to MODULES=() in /etc/mkinitcpio.conf did not help.

Workaround

Switch to a different TTY and switch back. The GDM will start now.

Source

https://bbs.archlinux.org/viewtopic.php?pid=1925092#p1925092

Autocomplete doesn't work for aliases

Solution

Install https://aur.archlinux.org/packages/bash-complete-alias from AUR. And source it and enable completion for all your after all aliases are defined:

...

alias k='kubectl'

source /usr/share/bash-complete-alias/complete_alias

complete -F _complete_alias "${!BASH_ALIASES[@]}"

Autocompletion for interactively defined aliases can be also interactively enabled:

$ alias foo='systemctl'

$ complete -F _complete_alias foo