Claude
14078f0466
Standalone gst-launch testing confirmed appsink-as-playbin-video-sink works fine outside the extension (reaches PLAYING, negotiates caps, runs to completion), narrowing the "no frames received" symptom down to something inside our own new-sample handling in the shell process. _onNewSample()'s try/catch didn't cover the sink.pull_sample() call itself — if that specific call throws when invoked as a GJS signal callback, the exception bypassed our logging entirely, falling back to GJS's generic uncaught-exception path (which, like the openPreferences case, may not mention "benthicbloom" and gets missed by a filtered grep). Now the whole handler is covered, logs when the signal fires for the first time, logs a null pull_sample() or failed buffer.map() explicitly, and the watchdog reports the new-sample fire count so we can tell "signal never fired" from "signal fired but processing failed" on the next test. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_019RDqbdjsiisSU7CbQke4g8
BenthicBloom
A GNOME Shell 50 extension that automatically rotates your wallpaper, supports looping video (live) wallpapers, and includes built-in protection against OLED burn-in.
Features
- Auto rotation — pick one or more folders and BenthicBloom cycles through the images inside them on a timer, in sequential or shuffled order, with an optional crossfade between changes. The chosen wallpaper can also be applied to the lock screen.
- Live wallpapers — play a looping video or animated GIF as your desktop background. Frames are decoded with GStreamer and rendered directly by GNOME Shell's own Clutter stage (no external, incompatible Clutter build involved). Playback can automatically pause on battery power or while a window is fullscreen. Automatic rotation is automatically suspended while a live wallpaper is actually on screen (and resumes afterward), since changing the static wallpaper would otherwise repaint over the video.
- OLED burn-in protection — three independent, individually toggled
techniques:
- Pixel shifting: nudges the background a few pixels on a slow drift cycle so the same subpixels aren't lit continuously.
- Idle dimming: fades the background to a configurable lower brightness after the system has been idle for a while, and restores it the moment you're back.
- Forced rotation: guarantees the wallpaper changes after a maximum static duration, even if automatic rotation is otherwise switched off.
- A top-bar indicator for quick access to rotation, live wallpaper, and OLED protection toggles, plus a "Next Wallpaper" action, and a full libadwaita preferences window.
Requirements
- GNOME Shell 50.
- For live wallpapers: GStreamer with its
goodandbaseplugin sets (e.g.gstreamer1.0-plugins-goodandgstreamer1.0-plugins-base, or your distribution's equivalent) — thegoodset is also what provides animated GIF decoding. If these aren't installed, the live wallpaper toggle stays disabled and BenthicBloom's other features work normally.
Installation
From source
git clone https://github.com/quinta0/benthicbloom.git
cd benthicbloom
make install
Then reload GNOME Shell — press Alt+F2, type r,
press Enter on X11, or log out and back in on Wayland — and
enable the extension:
gnome-extensions enable benthicbloom@quinta0.github.io
Packaging a zip
make pack
produces dist/benthicbloom@quinta0.github.io.shell-extension.zip,
installable via gnome-extensions install <file> or the Extensions app.
Configuration
Open preferences from the panel indicator's "Wallpaper Settings…" entry, or run:
gnome-extensions prefs benthicbloom@quinta0.github.io
- General — panel indicator visibility, lock screen syncing, debug logging, and the folders scanned for wallpapers.
- Rotation — enable/disable, interval, shuffle vs. sequential order, and crossfade transition settings.
- Live Wallpaper — enable/disable, video file, mute, playback speed, and power-saving pause behavior.
- OLED Protection — master switch plus independent controls for pixel shifting, idle dimming, and forced periodic rotation.
Architecture
extension.js Entry point: wires up the three managers + indicator
prefs.js libadwaita preferences window
lib/settingsKeys.js GSettings key name constants
lib/logger.js Small logging wrapper gated by the debug-logging setting
lib/wallpaperSource.js Async folder scanning for image files
lib/shuffleBag.js No-immediate-repeat random ordering for shuffle mode
lib/rotationManager.js Timer-driven wallpaper rotation + crossfade overlay
lib/liveWallpaper.js GStreamer video playback rendered onto a Clutter actor
lib/oledProtection.js Pixel shifting, idle dimming, forced rotation
lib/indicator.js Top-bar quick-access menu
schemas/ GSettings schema
Known limitations
- The live wallpaper currently renders across the full stage as a single layer, so on multi-monitor setups the video spans across all monitors as one canvas rather than being tiled per-monitor.
- Pixel shifting and idle dimming rely on GNOME Shell's private
Main.layoutManager._backgroundGroupandMeta.IdleMonitorAPIs, which are not part of the stable extension API and could change in future shell versions.
Testing
This was developed and validated (JSON, GSettings schema compilation, and JavaScript syntax) without a live GNOME Shell 50 session available in the development environment. Before relying on it, test in a nested session:
dbus-run-session -- gnome-shell --nested --wayland
or on a real GNOME 50 desktop, and please file an issue with any problems you hit.
License
GPL-3.0-or-later — see LICENSE.