forked from unom/punktfunk
enricobuehlerandClaude Fable 5
ddd0e5cc5d
A field report (CachyOS, KWin 6.7.3, Plasma): topology primary streams the new virtual display but the desktop stays on the physical — while the host logs primary_taken=true on every apply. Both halves were real: * KWin's handler for kde_output_configuration_v2.set_primary_output is literally '// intentionally ignored' (verified in the 6.7.3 source). The output order is driven by per-output set_priority (management >= 3; we bind up to v22 and never called it). Exclusive only ever LOOKED right because disabling every other output leaves KWin nothing else to promote. Now: ours gets priority 1 and every other enabled output is renumbered uniquely behind it, exactly what kscreen-doctor does — the reporter proved that path applies and sticks on their box. set_primary_output is still sent for pre-v3 compositors. * primary_taken echoed the REQUEST. The log now waits one sync barrier for KWin's post-apply priority events and reports primary_verified from the read-back — a request the compositor ignores can never ship a green log again; the mismatch is a WARN naming the symptom. First-slot-wins refinement the working priorities made necessary: a SAME-NAMED output is this slot's own predecessor mid-supersede (mode switches create the replacement before dropping the old), not a sibling whose primary must be respected — deferring to it handed primary to whatever KWin promoted when the predecessor vanished a moment later. On-glass (nested KWin 6.7.3): fresh create, high-refresh custom-mode create, and the mode-switch supersede all read back verified=true; exclusive still disables + restores the other output in-process. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>