Only options that work
Hibernate only appears when logind says your computer can hibernate without a password prompt.
Linux sleep timer
Nightcap is a free, open-source Linux sleep timer that suspends your computer after a set time, with a tray icon and a slow fade.
You could run sleep 1h && systemctl suspend and leave a terminal open. Nightcap gives you a countdown you can pause, extend or cancel instead.
Free and open source, for x86_64.
Built on what your system already has
Suspend, hibernate and shut down go through systemd-logind and follow your polkit rules. Volume works with PipeWire, PulseAudio or ALSA.
Laptop backlights dim through logind or brightnessctl, and other screens get a see-through dark layer.
Right there in your tray
Start a 15, 30, 45 or 90 minute or 1 hour timer, check the time left, pause, add 15 minutes or cancel.
KDE Plasma shows the tray icon out of the box. On GNOME, add an AppIndicator extension.
It fades out like a TV
Twenty minutes before the end, the screen starts to dim, then the volume comes down.
Whatever you're watching or listening to trails off instead of cutting out.
One program, no account
Extract the tarball and run it. It works offline.
MIT or Apache 2.0
Read the code, build it yourself, or send a patch.
Suspend on a timer tonight
Extract it and run ./nightcap/nightcap. Getting started covers tray support.
More ways to use Nightcap
- Mac sleep timerPut your MacBook to sleep after 30, 60 or 90 minutes, from the menu bar.
- Mac shutdown timerShut down your Mac on a timer without typing Terminal commands.
- Windows sleep timerSleep, hibernate or shut down a Windows 11 or 10 PC after a set time.
- Netflix sleep timerFall asleep to Netflix, YouTube or Spotify without it playing all night.
- Shutdown Timer Classic alternativeHow Nightcap compares with Shutdown Timer Classic, Wise Auto Shutdown and Sleepr.