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drm: do not modeset to current mode
There is no point in modesetting an output to a mode that it is already set to. Modesetting will cause the output to briefly flicker which is undesirable for a noop. This returns early in `drm_connector_set_mode` when attempting to modeset to the current mode.
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@ -537,6 +537,10 @@ static bool drm_connector_set_mode(struct wlr_output *output,
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conn->desired_mode = mode;
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return false;
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}
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if (conn->output.current_mode == mode) {
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// Nothing to do
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return true;
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}
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wlr_log(WLR_INFO, "Modesetting '%s' with '%ux%u@%u mHz'",
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conn->output.name, mode->width, mode->height, mode->refresh);
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