Debugging flags - swaywm/sway GitHub Wiki

Sway has some debugging options available via the -D command-line flag.

• -D noatomic: disables atomic transactions
• -D txn-wait: forces all atomic transactions to time out
• -D txn-timings: logs addition information about transaction timings
• -D txn-timeout=<ms>: overrides the default atomic transaction timeout
• -D legacy-wl-drm: enables the legacy wl_drm protocol extension (Sway 1.10 and later)

Also see enable_debug_flag().

On Sway ≤ 1.9, the following flags are also supported:

• -D damage=highlight: paints regions that haven't been updated in yellow (replaced by WLR_SCENE_DEBUG_DAMAGE=highlight on Sway 1.10)
• -D damage=rerender: disables damage tracking by forcing the whole output to be repainted each frame (replaced by WLR_SCENE_DEBUG_DAMAGE=rerender on Sway 1.10)
• -D noscanout: disables direct scan-out (replaced by WLR_SCENE_DISABLE_DIRECT_SCANOUT=1 on Sway 1.10)