背景：需要控制笔记本屏幕时间和电源模式
./power_settings.sh
使用AI生成脚本./power_settings.sh，功能如下：
Interactive menu (run ./power_settings.sh with no args):
┌─────┬────────────────────────────────────────────────────┐
│ Key │ Action │
├─────┼────────────────────────────────────────────────────┤
│ 1 │ Set screen off time (minutes) │
├─────┼────────────────────────────────────────────────────┤
│ 2 │ Set lock delay after screen off │
├─────┼────────────────────────────────────────────────────┤
│ 3 │ Choose power profile │
├─────┼────────────────────────────────────────────────────┤
│ 4 │ Set brightness (0-100%) │
├─────┼────────────────────────────────────────────────────┤
│ 5 │ Disable screen timeout entirely │
├─────┼────────────────────────────────────────────────────┤
│ 6-8 │ Quick switch: power-saver / balanced / performance │
└─────┴────────────────────────────────────────────────────┘
CLI mode (non-interactive):
./power_settings.sh --screen-off 10 # screen off after 10 min
./power_settings.sh --screen-off 0 # never turn off
./power_settings.sh --power power-saver # power saver mode
./power_settings.sh --power performance # performance mode
./power_settings.sh --brightness 50 # 50% brightness
./power_settings.sh --status # show all settings
Dependencies:
- gsettings (GNOME) — screen timeout & lock delay
- powerprofilesctl or tuned-adm — power profiles
- brightnessctl — brightness control (install with sudo apt install
brightnessctl)
It auto-detects which tools are available on your system.
code
#!/bin/bash
# Power & Screen Settings Manager
# Usage: ./power_settings.sh
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
CYAN='\033[0;36m'
NC='\033[0m'
# ─── Screen Timeout (GNOME / gsettings) ───
get_screen_timeout() {
local idle=$(gsettings get org.gnome.desktop.session idle-delay 2>/dev/null)
if [[ "$idle" == "uint32 0" || -z "$idle" ]]; then
echo "Disabled (never)"
else
local seconds=$(echo "$idle" | grep -oP '\d+$')
echo "$((seconds / 60)) min ($seconds s)"
fi
}
set_screen_timeout() {
local minutes=$1
if [[ "$minutes" == "0" ]]; then
gsettings set org.gnome.desktop.session idle-delay 0
echo -e "${GREEN}Screen timeout: disabled (never turn off)${NC}"
else
local seconds=$((minutes * 60))
gsettings set org.gnome.desktop.session idle-delay "uint32 $seconds"
echo -e "${GREEN}Screen timeout: $minutes min${NC}"
fi
}
# ─── Lock Screen Timeout ───
get_lock_timeout() {
local lock=$(gsettings get org.gnome.desktop.screensaver lock-delay 2>/dev/null)
if [[ "$lock" == "uint32 0" || -z "$lock" ]]; then
echo "Immediate"
else
local seconds=$(echo "$lock" | grep -oP '\d+$')
echo "$((seconds / 60)) min ($seconds s)"
fi
}
set_lock_timeout() {
local minutes=$1
local seconds=$((minutes * 60))
gsettings set org.gnome.desktop.screensaver lock-delay "uint32 $seconds"
echo -e "${GREEN}Lock delay: $minutes min after screen off${NC}"
}
# ─── Power Profile (powerprofilesctl) ───
get_power_profile() {
if command -v powerprofilesctl &>/dev/null; then
powerprofilesctl get 2>/dev/null || echo "unknown"
elif command -v tuned-adm &>/dev/null; then
tuned-adm active 2>/dev/null | sed 's/.*: //' || echo "unknown"
else
echo "no power manager found"
fi
}
list_power_profiles() {
if command -v powerprofilesctl &>/dev/null; then
echo -e "${CYAN}Available profiles:${NC}"
powerprofilesctl list 2>/dev/null
elif command -v tuned-adm &>/dev/null; then
echo -e "${CYAN}Available profiles:${NC}"
tuned-adm list 2>/dev/null
else
echo -e "${RED}No supported power manager found.${NC}"
echo "Install power-profiles-daemon or tuned."
fi
}
set_power_profile() {
local profile=$1
if command -v powerprofilesctl &>/dev/null; then
powerprofilesctl set "$profile" 2>/dev/null
if [[ $? -eq 0 ]]; then
echo -e "${GREEN}Power profile set to: $profile${NC}"
else
echo -e "${RED}Failed. Valid: balanced, power-saver, performance${NC}"
fi
elif command -v tuned-adm &>/dev/null; then
tuned-adm profile "$profile" 2>/dev/null
if [[ $? -eq 0 ]]; then
echo -e "${GREEN}Power profile set to: $profile${NC}"
else
echo -e "${RED}Failed. Run 'tuned-adm list' for valid profiles.${NC}"
fi
else
echo -e "${RED}No power manager available.${NC}"
fi
}
# ─── Brightness ───
get_brightness() {
if command -v brightnessctl &>/dev/null; then
brightnessctl -m | awk -F, '{print $4}'
elif [[ -f /sys/class/backlight/*/brightness ]]; then
local max=$(cat /sys/class/backlight/*/max_brightness 2>/dev/null)
local cur=$(cat /sys/class/backlight/*/brightness 2>/dev/null)
echo "$((cur * 100 / max))%"
else
echo "N/A"
fi
}
set_brightness() {
local pct=$1
if command -v brightnessctl &>/dev/null; then
brightnessctl set "${pct}%" 2>/dev/null
echo -e "${GREEN}Brightness: ${pct}%${NC}"
else
echo -e "${RED}brightnessctl not found. Install it: sudo apt install brightnessctl${NC}"
fi
}
# ─── Auto Suspend (systemd) ───
get_auto_suspend() {
local on_battery=$(gsettings get org.gnome.settings-daemon.plugins.power sleep-inactive-battery-type 2>/dev/null)
local on_ac=$(gsettings get org.gnome.settings-daemon.plugins.power sleep-inactive-ac-type 2>/dev/null)
echo " Battery: ${on_battery:-unknown}"
echo " AC: ${on_ac:-unknown}"
}
# ─── Menu ───
show_status() {
echo -e "\n${CYAN}════════════════════════════════════════${NC}"
echo -e "${CYAN} Current Settings${NC}"
echo -e "${CYAN}════════════════════════════════════════${NC}"
echo -e " Screen timeout : $(get_screen_timeout)"
echo -e " Lock delay : $(get_lock_timeout)"
echo -e " Power profile : $(get_power_profile)"
echo -e " Brightness : $(get_brightness)"
echo -e " Auto-suspend :"
get_auto_suspend
echo -e "${CYAN}════════════════════════════════════════${NC}\n"
}
main_menu() {
while true; do
show_status
echo -e "${YELLOW}Actions:${NC}"
echo " 1) Set screen timeout"
echo " 2) Set lock delay"
echo " 3) Set power profile"
echo " 4) Set brightness"
echo " 5) Disable screen timeout (never off)"
echo " 6) Quick: power-saver mode"
echo " 7) Quick: balanced mode"
echo " 8) Quick: performance mode"
echo " q) Quit"
echo ""
read -p "Choose [1-8, q]: " choice
case $choice in
1)
read -p "Screen off after (minutes, 0=never): " mins
set_screen_timeout "$mins"
;;
2)
read -p "Lock delay (minutes after screen off): " mins
set_lock_timeout "$mins"
;;
3)
list_power_profiles
read -p "Profile name: " profile
set_power_profile "$profile"
;;
4)
read -p "Brightness (0-100): " pct
set_brightness "$pct"
;;
5)
set_screen_timeout 0
;;
6)
set_power_profile "power-saver"
;;
7)
set_power_profile "balanced"
;;
8)
set_power_profile "performance"
;;
q|Q) exit 0 ;;
*) echo -e "${RED}Invalid option${NC}" ;;
esac
echo ""
done
}
# ─── CLI mode (non-interactive) ───
if [[ "$1" == "--screen-off" && -n "$2" ]]; then
set_screen_timeout "$2"
elif [[ "$1" == "--power" && -n "$2" ]]; then
set_power_profile "$2"
elif [[ "$1" == "--brightness" && -n "$2" ]]; then
set_brightness "$2"
elif [[ "$1" == "--status" ]]; then
show_status
elif [[ "$1" == "--help" || "$1" == "-h" ]]; then
echo "Usage:"
echo " $0 Interactive menu"
echo " $0 --screen-off <minutes> Set screen timeout (0=never)"
echo " $0 --power <profile> Set power profile"
echo " $0 --brightness <0-100> Set brightness"
echo " $0 --status Show current settings"
else
main_menu
fi