StreamController crashing with HomeAssistant Plugin

[alexsperlingz]

hey :)

as described in this issue: #5
my stream controller crashes when the home assistant plugin is installed and when there are home assistant buttons configured.
I uninstalled the plugin at the begining of march 2026 and since then i did not installed the plugin.
everything worked with streamcontroller, no crashes what so ever.

today i thought i want to give the home assistant plugin a try again. so i went ahead:

• launched streamcontroller via terminal to have a log
• opened the plugin store
• installed your home assistant plugin
• setup the connection via settings to my HA instance
• placed "show icon" and "perform action" on a button for light
• toggling the light works
• going back a page and again in the folder and clicking onto another (emty button) and back on the newly configured button and BOOM, crash

here is the part of the log:
2026-04-20 19:21:56.270 | INFO | src.backend.DeckManagement.DeckController:load_page:768 - Loaded page SD_F1_Licht on deck AL43J2C03791
2026-04-20 19:21:56.309 | INFO | src.backend.DeckManagement.DeckController:load_page:737 - Loading page SD_F1_Licht on deck AL43J2C03791
2026-04-20 19:21:56.315 | DEBUG | src.backend.DeckManagement.DeckController:update_all_inputs:468 - Updating all inputs took 0.045588016510009766 seconds
2026-04-20 19:21:56.828 | INFO | src.backend.DeckManagement.DeckController:load_brightness:638 - 51
2026-04-20 19:21:56.828 | INFO | src.backend.DeckManagement.DeckController:load_background:610 - Loading background in thread: 140001287329472
2026-04-20 19:21:56.867 | INFO | src.backend.DeckManagement.DeckController:load_screensaver:648 - Loading screensaver in thread: 140004381354944
2026-04-20 19:21:56.868 | INFO | src.backend.DeckManagement.DeckController:load_page:768 - Loaded page SD_F1_Licht on deck AL43J2C03791
2026-04-20 19:21:56.906 | ERROR | src.backend.DeckManagement.DeckController:update_ui_on_page_change:700 - 'PageSettingsPage' object has no attribute 'settings_page' -> This is okay if you just activated your first deck.
2026-04-20 19:21:56.906 | INFO | src.backend.DeckManagement.DeckController:load_all_inputs:673 - Loading all inputs took 0.038872480392456055 seconds
2026-04-20 19:21:56.913 | DEBUG | src.backend.DeckManagement.DeckController:update_all_inputs:468 - Updating all inputs took 0.006772518157958984 seconds
2026-04-20 19:22:16.147 | TRACE | src.windows.mainWindow.elements.Sidebar.elements.ActionManager:add_action:697 - Adding action: <src.backend.PluginManager.ActionHolder.ActionHolder object at 0x7f55214e68d0>
2026-04-20 19:22:16.148 | INFO | src.backend.PluginManager.ActionCore:init:90 - Loaded action Show Icon with id HomeAssistantPlugin::ShowIcon
2026-04-20 19:22:16.159 | DEBUG | src.backend.PageManagement.Page:load:86 - Loaded page SD_F1_Licht in 0.01 seconds
2026-04-20 19:22:16.159 | DEBUG | src.backend.PageManagement.Page:load:86 - Loaded page SD_F1_Licht in 0.00 seconds
2026-04-20 19:22:47.901 | TRACE | src.windows.mainWindow.elements.Sidebar.elements.ActionManager:add_action:697 - Adding action: <src.backend.PluginManager.ActionHolder.ActionHolder object at 0x7f55214e6a80>
2026-04-20 19:22:47.902 | INFO | src.backend.PluginManager.ActionCore:init:90 - Loaded action Perform Action with id HomeAssistantPlugin::PerformAction
2026-04-20 19:22:47.915 | DEBUG | src.backend.PageManagement.Page:load:86 - Loaded page SD_F1_Licht in 0.01 seconds
2026-04-20 19:22:47.916 | DEBUG | src.backend.PageManagement.Page:load:86 - Loaded page SD_F1_Licht in 0.00 seconds
2026-04-20 19:23:10.322 | DEBUG | src.backend.PageManagement.Page:load:86 - Loaded page SD_F1_Licht in 0.00 seconds
2026-04-20 19:23:10.323 | DEBUG | src.backend.PageManagement.Page:load:86 - Loaded page SD_F1_Licht in 0.00 seconds
**
Gtk:ERROR:../gtk/gtk/gtklistitemmanager.c:1039:gtk_list_tile_split: assertion failed: (n_items < tile->n_items)
Bail out! Gtk:ERROR:../gtk/gtk/gtklistitemmanager.c:1039:gtk_list_tile_split: assertion failed: (n_items < tile->n_items)
2026-04-20 19:23:12.096 | INFO | streamcontroller_plugin_tools.BackendBase:on_disconnect:39 - Connection closed
2026-04-20 19:23:12.096 | INFO | streamcontroller_plugin_tools.BackendBase:on_disconnect:39 - Connection closed
2026-04-20 19:23:12.096 | DEBUG | main:on_disconnect:46 - WebSocket Server shutdown started...
2026-04-20 19:23:12.096 | INFO | streamcontroller_plugin_tools.BackendBase:on_disconnect:39 - Connection closed
2026-04-20 19:23:12.148 | INFO | streamcontroller_plugin_tools.BackendBase:on_disconnect:39 - Connection closed
2026-04-20 19:23:12.148 | INFO | streamcontroller_plugin_tools.BackendBase:on_disconnect:39 - Connection closed
/usr/bin/streamcontroller: Zeile 4: 53002 Abgebrochen (Speicherabzug geschrieben) python main.py $@

~ 1m 32s
❯ 2026-04-20 19:23:12.579 | INFO | streamcontroller_plugin_tools.BackendBase:on_disconnect:39 - Connection closed

picture:

general information:

• cachyOS, Stream Deck 15 Key, MK1.

[gensyn]

I am actually waiting for a new version to be admitted into the store which mitigates some GTK issues - though those were specifically when starting StreamController. Still, I would like to wait until you have the new version before diving deeper into this.

[gensyn]

Is this behavior deterministic on your machine? Following those steps does not crash my instance of StreamController.

[alexsperlingz]

yes, i can reproduce this behavior again.

maybe more information regarding my machine would be helpful:
CPU AMD Ryzen 7 5800X (8) @ 4.85 GHz
GPU GeForce RTX 3080
RAM 32GB DDR4
OS CachyOS
Kernel 7.0.0-1
DE KDE Plasma with KWin (Wayland)
Stream Deck - 1x Stream Deck 15 Keys MK1 and 1x Stream Deck Plus Gen1 connected via XLR Dock.

i tested the behavior and crash with the 15 key deck.

[gensyn]

Ok, the new version is available through the store.

[alexsperlingz]

sorry for the late answer, i was on vacation.
yesterday i installed the new plugin version 1.1.1 and tested:

placed this button:

all fine. then copied the button for another light bulb, set it up. toggled it few time and and off, went a page back and again to the page where these two HA buttons are placed and - crash..

[gensyn]

Copilot suggested some changes that might solve the problem. Would you be able and willing to try out branch copilot/fix-streamcontroller-crash-home-assistant to see if it fixes the issue for you?

[alexsperlingz]

Copilot suggested some changes that might solve the problem. Would you be able and willing to try out branch copilot/fix-streamcontroller-crash-home-assistant to see if it fixes the issue for you?

i would like to help and test but i dont know how to try out this branch. i am not so confident in using git :/

[gensyn]

You don't need git. You can go to the branch and by clicking the big green button "Code" you can download the branch as a ZIP. You would then need to find StreamController's plugin directory and replace HomeAssistantPlugin's folder content with the ZIP content. (And restart StreamController).

[alexsperlingz]

okay, i just downloaded the branch and pasted the content of the zip into my plugin folder. then startet stream controller again. i then added more buttons and configured them. also played around with toggling lights on and off and also changing pages. still no crash as usual.
i think the problem could be fixed now!
but let me test the branch maybe a couple more days?

[gensyn]

Yeah, go nuts. Sounds promising!

[gensyn]

Since I don't have any problems and think this is an improvement, I'm gonna merge this soon.