{"record":{"id":"8816b872a6548aec","repo":"LGUG2Z/komorebi","slug":"failed-call-to-allowsetforegroundwindow-after-5-re","errorCode":null,"errorMessage":"failed call to AllowSetForegroundWindow after 5 retries","messagePattern":"failed call to AllowSetForegroundWindow after 5 retries","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"critical","filePath":"komorebi/src/main.rs","lineNumber":219,"sourceCode":"    CUSTOM_FFM.store(opts.focus_follows_mouse, Ordering::SeqCst);\n\n    let mut set_foreground_window_retries = 5;\n    let mut set_foreground_window_succeeded = false;\n\n    let process_id = WindowsApi::current_process_id();\n    while set_foreground_window_retries > 0 && !set_foreground_window_succeeded {\n        match WindowsApi::allow_set_foreground_window(process_id) {\n            Ok(_) => {\n                set_foreground_window_succeeded = true;\n            }\n            Err(error) => {\n                tracing::error!(\"{error}\");\n                set_foreground_window_retries -= 1;\n            }\n        }\n\n        if set_foreground_window_retries == 0 {\n            bail!(\"failed call to AllowSetForegroundWindow after 5 retries\");\n        }\n    }\n\n    WindowsApi::set_process_dpi_awareness_context()?;\n\n    let session_id = WindowsApi::process_id_to_session_id()?;\n    SESSION_ID.store(session_id, Ordering::SeqCst);\n\n    let mut system = sysinfo::System::new();\n    system.refresh_processes(ProcessesToUpdate::All, true);\n\n    let matched_procs: Vec<&Process> = system.processes_by_name(\"komorebi.exe\".as_ref()).collect();\n\n    if matched_procs.len() > 1 {\n        let mut len = matched_procs.len();\n        for proc in matched_procs {\n            if let Some(executable_path) = proc.exe()\n                && executable_path.to_string_lossy().contains(\"shims\")","sourceCodeStart":201,"sourceCodeEnd":237,"githubUrl":"https://github.com/LGUG2Z/komorebi/blob/e0709f02bfae4e503bf4640f58ee75ecbbfdbb97/komorebi/src/main.rs#L201-L237","documentation":"During komorebi startup, after a window operation the main loop calls AllowSetForegroundWindow to let the foreground window be set; it retries up to 5 times on failure. If all retries fail, it bails with this error and komorebi exits.","triggerScenarios":"Five consecutive Win32 AllowSetForegroundWindow failures during main() startup — typically a failing HWND, another process holding foreground rights, or restricted window station/desktop access.","commonSituations":"Running komorebi in a non-interactive session (service/SSH), foreground lock imposed by Windows when another app holds foreground permission, antivirus/policy restrictions on window APIs.","solutions":["Run komorebi inside a normal interactive desktop session, not as a service or scheduled task without a desktop.","Retry after confirming no other app holds foreground lock; restart the shell/explorer if stale.","Check group policy / security software restrictions on AllowSetForegroundWindow.","Update komorebi — later versions may have adjusted the foreground handoff logic."],"exampleFix":"// before\n# running komorebi via SSH session (no interactive desktop)\n// after\n# launch komorebi from a logged-in desktop session (e.g. komorebic start in a normal terminal)","handlingStrategy":"retry","validationCode":"// Before launching, confirm an interactive desktop session\nif (!Environment.UserInteractive) throw new InvalidOperationException(\"komorebi requires an interactive desktop session\");","typeGuard":null,"tryCatchPattern":"match std::panic::catch_unwind(komorebi_main) {\n    Err(_) => eprintln!(\"AllowSetForegroundWindow failed 5x — run inside an interactive session\"),\n    Ok(v) => v,\n}","preventionTips":["Launch komorebi from a logged-in desktop session, never as a service","Avoid running under SSH/scheduled-task contexts without a desktop","Keep security software from hooking Win32 window APIs","Update komorebi to the latest release"],"tags":["win32","startup","foreground-window"],"backgroundTag":"unsupported-operation","analyzedSha":"e0709f02bfae4e503bf4640f58ee75ecbbfdbb97","analyzedAt":"2026-09-06T07:08:05.107Z","contentChangedAt":"2026-09-06T07:08:05.107Z","schemaVersion":2},"datasetVersion":"2026-09-14T00:17:10.932Z"}