xps-setup.sh

#!/bin/bash
set -x
set -e

# Function to add line to file if not already present
function add_line() {
	local line=$1
	local file=$2
	touch $file
	grep -q "$line" "$file" || echo -e "$line" >> "$file"
}

# Install minimal set of tools
apt -y install \
	i7z \
	powertop \
	i8kutils \
	htop \
	iotop \
	lm-sensors \
	cpufrequtils \
	git \
	vim \
	pcregrep \
	curl \
	postgresql \
	gnome-tweaks

# Enable sensor modules
add_line "coretemp" /etc/modules
add_line "dell-smm-hwmon" /etc/modules
echo options dell-smm-hwmon restricted=0 force=1 ignore_dmi=1 > /etc/modprobe.d/dell-smm-hwmon.conf

# Enable undervolting
test -d /root/undervolt || git clone https://github.com/georgewhewell/undervolt.git /root/undervolt
add_line "* * * * * /root/undervolt/undervolt.py --core -100 --cache -100" /var/spool/cron/crontabs/root

# Enable performance scheduling governor
add_line "* * * * * cpufreq-set -g powersave" /var/spool/cron/crontabs/root

# Try to avoid audio skipping/crackling
add_line "options snd-hda-intel position_fix=1" /etc/modprobe.d/alsa-base.conf

# Create powerkeepalive script
cat > /usr/local/bin/powerkeepalive << EOF
#!/bin/bash
for usbdevice in \$(find /sys/bus/usb/devices/); do test -w \${usbdevice}/power/control && echo on > \${usbdevice}/power/control; true; done
echo 0 > /sys/module/snd_hda_intel/parameters/power_save
EOF
chmod +x /usr/local/bin/powerkeepalive

# Powertop auto-tune
test -f /etc/systemd/system/powertop-autotune.service || cat >> /etc/systemd/system/powertop-autotune.service << EOF
[Unit]
Description=Auto-tune power savings (oneshot)

[Service]
Type=oneshot
ExecStart=/usr/sbin/powertop --auto-tune
ExecStartPost=/usr/local/bin/powerkeepalive
RemainAfterExit=true

[Install]
WantedBy=multi-user.target
EOF

# Enable and run the powertop script
systemctl enable powertop-autotune
systemctl start powertop-autotune