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OpenRGB 1.0 applies SDK writes on a per-controller thread but answers REQUEST_CONTROLLER_DATA right away, so the update() in set_mode() can return the previous mode. set_color() and set_colors() then dispatch on that stale mode, and when it has no colors (e.g. Off) they send nothing. Home Assistant hits this every time it turns a light on from Off. See https://gitlab.com/CalcProgrammer1/OpenRGB/-/work_items/5924 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Bs25H1VRVY917EZg6GxZhr
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Device.set_mode()sendsUPDATEMODEand then callsupdate(). OpenRGB 1.0 applies SDK writes on a per-controller thread but answersREQUEST_CONTROLLER_DATAright away, so thatupdate()can return the previous mode.set_color()andset_colors()then dispatch on the staleactive_mode, and when it has no colors (e.g.Off) they send nothing, without an error.Home Assistant's OpenRGB integration hits this every time it turns a light on from Off:
set_mode("Direct")followed byset_color(color, fast=True)leaves the device in Direct with its old color.This keeps
active_modeat the mode that was just sent. Against servers that apply writes in order the re-read already matches, so nothing changes there.The server side is reported as https://gitlab.com/CalcProgrammer1/OpenRGB/-/work_items/5924.
Testing
Off →
set_mode("Direct")→ randomset_color(..., fast=True), 20 rounds, each result checked from a second client (script in the OpenRGB issue), on a Razer Goliathus:0b02dc62(protocol 6)1e1fb09(protocol 5)flake8 and mypy output is unchanged.
🤖 Generated with Claude Code
https://claude.ai/code/session_01Bs25H1VRVY917EZg6GxZhr