I'm not sure about "linux-lqx"
but try this
sudo cp /etc/mkinitcpio.d/linux.preset /etc/mkinitcpio.d/linux-lqx.preset
then use a editor. "nano" for this example.
sudo nano /etc/mkinitcpio.d/linux-lqx.preset
and change it to look like this
# mkinitcpio preset file for the 'linux-lqx' package
ALL_config="/etc/mkinitcpio.conf"
ALL_kver="/boot/vmlinuz-linux-lqx"
PRESETS=('default' 'fallback')
#default_config="/etc/mkinitcpio.conf"
default_image="/boot/initramfs-linux-lqx.img"
#default_options=""
#fallback_config="/etc/mkinitcpio.conf"
fallback_image="/boot/initramfs-linux-lqx-fallback.img"
fallback_options="-S autodetect"
and then run this on shell
sudo update-grub
if this doesn't work and output of pacman -Qkk linux-lqx
shows no difference. there's a problem with package itself