Implement the wlr-output-power-management protocol #3077
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This protocol allows external programs (e.g. wlopm) to control and query the output power state (on/off). In the current implementation, when the client sends a `set_mode` request, the handler calls `activate_monitors()` or `deactivate_monitors()` to set that state for all monitors. This is probably simpler than adding full support for per-output power management, and is good enough for the most common use cases like idle screensavers. The `output_power.mode` event is now emitted by `activate_monitors()` and `deactivate_monitors()` when the state changes. A bit of a rewrite was needed because the tty backend tries to activate monitors on resume, but previously it wasn't calling `activate_monitors()` because it is unable to provide a reference to the `Backend` that wraps it. I worked around this by adding a second method that does not take a backend parameter, instead assuming that the backend will take care of calling itself.
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Atan-D-RP4
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Jan 3, 2026
Adds per-output power control on top of PR YaLTeR#3077's global implementation: - Add power_mode: Mode field to OutputState (defaults to On) - Add set_output_power() method in TtyBackend following VRR pattern - Block redraw when per-output power_mode is Off - Update protocol handler to use per-output state instead of global monitors_active - Global monitors_active still takes precedence (AND logic) - activate_monitors() restores individual output power states Fixes YaLTeR#108 with true per-output DPMS support.
Atan-D-RP4
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Jan 5, 2026
Adds per-output power control on top of PR YaLTeR#3077's global implementation: - Add power_mode: Mode field to OutputState (defaults to On) - Add set_output_power() method in TtyBackend following VRR pattern - Block redraw when per-output power_mode is Off - Update protocol handler to use per-output state instead of global monitors_active - Global monitors_active still takes precedence (AND logic) - activate_monitors() restores individual output power states Fixes YaLTeR#108 with true per-output DPMS support.
Atan-D-RP4
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Jan 8, 2026
Adds per-output power control on top of PR YaLTeR#3077's global implementation: - Add power_mode: Mode field to OutputState (defaults to On) - Add set_output_power() method in TtyBackend following VRR pattern - Block redraw when per-output power_mode is Off - Update protocol handler to use per-output state instead of global monitors_active - Global monitors_active still takes precedence (AND logic) - activate_monitors() restores individual output power states Fixes YaLTeR#108 with true per-output DPMS support.
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Almost #1108.
Rebase and resolve conflict.
I believe it's ready for review.
Still left a ton of problems.It's impossible to implent multi displays because I haven't. 😅
Actually, niri hasn't been designed carefully to correctly handle disable some monitors.