bs.sh

#!/bin/bash
# shellcheck disable=SC2015

# wifi performance
echo "[connection]
# Values are 0 (use default), 1 (ignore/don't touch), 2 (disable) or 3 (enable).
wifi.powersave = 2
" | sudo tee /etc/NetworkManager/conf.d/wifi-powersave.conf >/dev/null
sudo cp -f /etc/NetworkManager/conf.d/wifi-powersave.conf /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf
[ ! -f /lib/NetworkManager/conf.d/20-connectivity-ubuntu.conf ] || sudo sed -i "s/uri=.*$/uri=/" /lib/NetworkManager/conf.d/20-connectivity-ubuntu.conf

if grep -q Raspberry /proc/device-tree/model &>/dev/null; then

    # wifi 2.4GHz performance
    grep -q dtoverlay=disable-bt /boot/firmware/config.txt || echo "dtoverlay=disable-bt" | sudo tee -a /boot/firmware/config.txt >/dev/null

    if [ ! -f /etc/modprobe.d/brcmfmac.conf ]; then
        # wifi chip bug: https://github.com/raspberrypi/linux/issues/6049#issuecomment-2642566713
        echo "options brcmfmac roamoff=1 feature_disable=0x202000" | sudo tee /etc/modprobe.d/brcmfmac.conf >/dev/null
        sudo systemctl restart systemd-modules-load
    fi
fi

# Verbose boot
if [ -f /etc/default/grub ]; then
    sudo cp -f /etc/default/grub /etc/default/grub.bak
    sudo sed -i 's/quiet splash//g' /etc/default/grub

    if grep -q "GRUB_CMDLINE_LINUX_DEFAULT" /etc/default/grub; then
        grep -q "nosplash debug --verbose" /etc/default/grub || sudo sed -i 's/^GRUB_CMDLINE_LINUX="\(.*\)/GRUB_CMDLINE_LINUX="nosplash debug --verbose \1/' /etc/default/grub
    else
        echo "GRUB_CMDLINE_LINUX_DEFAULT=\"nosplash debug --verbose\"" | sudo tee -a /etc/default/grub >/dev/null
    fi

    grep -q "GRUB_TIMEOUT=" /etc/default/grub && sudo sed -i 's/^GRUB_TIMEOUT=0/GRUB_TIMEOUT=3/' /etc/default/grub || echo "GRUB_TIMEOUT=3" | sudo tee -a /etc/default/grub >/dev/null
    diff /etc/default/grub.bak /etc/default/grub >/dev/null || sudo update-grub
    sudo rm -f /etc/default/grub.bak
fi