Lv_chart_refresh() does not refresh the chart immediately

[zapta]

This is where I got my info

Does LVGL delays display update requests?

Let’s say that I mutate chart data and immediately call lv_task_handler(). Will LVGL always render the pending changes in that call to lv_task_handler() or does it sometime don’t update the screen until it receives additional lv_tick_inc() call(s). If the answer is yes, is it possible to disable this behavior, forcing LVGL to render changes ASAP on the next call to lv_task_handler()? (LVGL 7.9.1)

This was for LVGL 7.x. Are you using 8.x? It’s new, may be different or may have a bug.

With charts you also need to call lv_chart_refresh() to mark it as dirty, in case you update it via API functions that don’t do it automatically.