diff --git a/patch_v2/meow_launcherd/backlight.c b/patch_v2/meow_launcherd/backlight.c
index e833284..a7305dc 100644
--- a/patch_v2/meow_launcherd/backlight.c
+++ b/patch_v2/meow_launcherd/backlight.c
@@ -17,18 +17,33 @@ int meow_auto_slept = 0;      /* M2.17：当前是否「超时自动息屏」置
 /* brightness save/restore (defined below, used by run_menu) */
 int saved_brightness = -1;
 
+/* M2.86：亮度「待补应用」挂起标志。launcher 被 sysui 在 S70 早拉起，早于 /usr/data(UBIFS) 就绪，
+ * settings_load 读到的是纯默认值（display.brightness=101→clamp 100）；此时 apply_user_brightness
+ * 若照写 100 即「开机遇 100 满亮」。修：设置未真正读到盘上时挂起，待 run_menu 轮询 settings_load
+ * 成功（meow_settings_loaded()==1）后补应用真实用户亮度。 */
+int meow_brightness_pending = 0;
+
 
 /* M2.53：MeowOS 主屏接管时把亮度强制压回用户设置值（display.brightness，经
  * meow_settings_brightness_clamped() —— 下限 brightness_min 默认 1、上限 100），
  * 覆盖 HibyOS 播放器写入 sysfs 的背光下限（16/25）。仅应在「MeowOS 真正接管画面」
  * （播放器已死、主屏常驻，即 run_menu 的 had_player==0）时调用；播放器会话期间的
- * 覆盖菜单（had_player==1）不去抢亮度——尊重播放器背光（§红线）。 */
+ * 覆盖菜单（had_player==1）不去抢亮度——尊重播放器背光（§红线）。
+ * M2.86：设置未读到（meow_settings_loaded()==0，S70 早启动 /usr/data 未就绪）时不盲目写 100 ——
+ * 挂起 meow_brightness_pending，待设置就绪后由 settings_load()（run_menu 每 2s 重试）补应用。 */
 void apply_user_brightness(void)
 {
+    if (!meow_settings_loaded()) {
+        if (!meow_brightness_pending)
+            logmsg("apply user brightness: settings unloaded, defer (not forcing 100)");
+        meow_brightness_pending = 1;
+        return;
+    }
     int v = meow_settings_brightness_clamped();
     if (v <= 0) v = 60;   /* 防御：clamp 后不可能 ≤0，仅兜底 */
     write_brightness(v);
     g_sys.brightness = v;
+    meow_brightness_pending = 0;
     logmsg("apply user brightness (MeowOS takeover) -> %d", v);
 }
 
diff --git a/patch_v2/meow_launcherd/main_menu.c b/patch_v2/meow_launcherd/main_menu.c
index 1474aad..5f8dcb0 100644
--- a/patch_v2/meow_launcherd/main_menu.c
+++ b/patch_v2/meow_launcherd/main_menu.c
@@ -960,6 +960,12 @@ static void run_menu(struct app apps[MAX_APPS], int napps, int state,
         if (meow_mode && (long)(t - t0) - meow_last_poll >= 2000) {
             meow_last_poll = (long)(t - t0);
             ensure_wifi();
+            /* M2.86 开机亮度竞态：launcher 被 sysui 在 S70 早拉起，/usr/data(UBIFS) 未就绪 →
+             * 首次 settings_load 读到纯默认值（display.brightness=101→clamp 100），apply_user_brightness
+             * 已挂起 meow_brightness_pending（不盲目写 100）。每 2s 重试 settings_load 直到读到
+             * settings.conf；settings_load 内置在「未读到→已读到」转换时补应用真实用户亮度。 */
+            if (meow_brightness_pending && !meow_settings_loaded())
+                settings_load();
             if (!sd_device_present()) {
                 /* 卡被拔出：设备节点消失 → 无卡态。停止扫描；留 state=1（NO STORAGE CARD）。
                  * 若此前是正常态，切到无卡并重绘。不杀正在跑的应用（其由 D 的监测处理）。 */
diff --git a/patch_v2/meow_launcherd/meow_launcher_internal.h b/patch_v2/meow_launcherd/meow_launcher_internal.h
index 02cac31..f20944f 100644
--- a/patch_v2/meow_launcherd/meow_launcher_internal.h
+++ b/patch_v2/meow_launcherd/meow_launcher_internal.h
@@ -558,6 +558,7 @@ long sys_mem_available_kb(void);
 extern uint32_t menu_bg;
 extern int menu_opened_blank;
 extern int meow_auto_slept;
+extern int meow_brightness_pending; /* M2.86：亮度待补应用挂起（apply_user_brightness 在设置未读到时不写，置 1） */
 extern int meow_mode;
 extern int meow_saved_brightness;
 extern int meow_screen_on;
diff --git a/patch_v2/meow_launcherd/meow_launcherd b/patch_v2/meow_launcherd/meow_launcherd
index e04f6b2..72296c3 100755
Binary files a/patch_v2/meow_launcherd/meow_launcherd and b/patch_v2/meow_launcherd/meow_launcherd differ
diff --git a/patch_v2/meow_launcherd/meow_settings.c b/patch_v2/meow_launcherd/meow_settings.c
index c9cbc43..2ffc3a9 100644
--- a/patch_v2/meow_launcherd/meow_settings.c
+++ b/patch_v2/meow_launcherd/meow_settings.c
@@ -59,6 +59,9 @@ static meow_settings_listener g_listeners[MEOW_SET_MAX_LISTENERS];
 static int g_nlisteners = 0;
 static int g_inited = 0;
 static int g_broadcasting = 0;    /* 防 listener 递归 set */
+static int g_loaded_from_file = 0; /* M2.86：settings.conf 是否真正从盘读到（区分「默认值激活」
+                                    *   因 /usr/data 未就绪 fopen 失败 vs 文件已读但键缺失→默认） */
+static int g_no_file_logged = 0;   /* M2.86：本次「未读到」连续段是否已打过 no-file 日志（防重启重试刷屏） */
 
 /* ---- 默认值表：与 SYSTEM_SETTINGS.md §1 逐键一致（新增设置照附录扩展）---- */
 static const meow_setting_def g_defs[] = {
@@ -243,6 +246,15 @@ int meow_settings_brightness_clamped(void)
     return clamp_brightness(v);
 }
 
+/* M2.86：settings.conf 是否真正从盘上读到过（最近一次 meow_settings_init 是否成功打开了文件）。
+ * 0=S70 早启动 /usr/data 未就绪 fopen 失败 → 当前全为默认值（display.brightness 101→将被 clamp 到 100），
+ *   此时调用方（尤其 apply_user_brightness）不应把默认值当作用户设定写入，应挂起待设置就绪。
+ * 1=文件已读到：键缺失则走各自默认（属「已知」态），用户设定可信。 */
+int meow_settings_loaded(void)
+{
+    return g_loaded_from_file;
+}
+
 /* ---- 按类型把字符串值 apply 到 cur（读文件/导入时用；含 clamp/校验）---- */
 static void apply_value(meow_setting *s, const char *v)
 {
@@ -332,12 +344,24 @@ int meow_settings_init(void)
         strncpy(g_sets[i].cur, g_sets[i].def, sizeof g_sets[i].cur - 1);
         g_sets[i].dirty = 0;
     }
+    /* M2.86：每次重载先把「已读到盘上」置 0；成功打开才置 1。
+     * 区分「settings.conf 被读到（键缺失→默认）」与「完全没读到（/usr/data 未就绪 → 纯默认）」，后者
+     * 调用方（apply_user_brightness）不得把默认值当作用户设定盲目写盘（尤其 display.brightness 101→clamp
+     * 100 会误把开机亮度压到满亮）。 */
+    g_loaded_from_file = 0;
     FILE *f = fopen(MEOW_SETTINGS_FILE, "r");
     if (!f) {
-        sset_log("no %s, defaults active", MEOW_SETTINGS_FILE);
+        /* M2.86：S70 早启动 /usr/data(UBIFS) 未就绪时 fopen 失败是常态，且 run_menu 每 2s 重试
+         * settings_load —— 只在本次「未读到」连续段首次打日志，避免每 2s 刷一行「no file」。 */
+        if (!g_no_file_logged) {
+            sset_log("no %s, defaults active", MEOW_SETTINGS_FILE);
+            g_no_file_logged = 1;
+        }
         g_inited = 1;
         return MEOW_OK;
     }
+    g_loaded_from_file = 1;   /* 文件已打开待读：即便 0 行也视为「已读到」→ 键缺失走默认而非「未知」 */
+    g_no_file_logged = 0;     /* 段复位：下次失败（若发生）重新计一句话 */
     char buf[768];
     while (fgets(buf, sizeof buf, f)) {
         char *eq = strchr(buf, '=');
diff --git a/patch_v2/meow_launcherd/meow_settings.h b/patch_v2/meow_launcherd/meow_settings.h
index 3c29a59..fc25904 100644
--- a/patch_v2/meow_launcherd/meow_settings.h
+++ b/patch_v2/meow_launcherd/meow_settings.h
@@ -76,6 +76,12 @@ int  meow_settings_get_bool(const char *key, int *out);   /* 0/1 */
  * settings 未初始化/键缺失时回退默认 101 再 clamp（→100）；纯函数，宿主机可直接测。 */
 int  meow_settings_brightness_clamped(void);
 
+/* M2.86：settings.conf 是否真正从盘上读到过（最近一次 meow_settings_init 成功打开文件）。
+ * 0 = S70 早启动 /usr/data 未就绪 fopen 失败 → 当前全为默认值（display.brightness 101→clamp 100），
+ *     调用方（尤其 apply_user_brightness）不得把默认值当作用户设定写入，应挂起待设置就绪再补应用；
+ * 1 = 文件已读到：键缺失走各自默认（属「已知」态），用户设定可信。 */
+int  meow_settings_loaded(void);
+
 int  meow_settings_set_int (const char *key, int v);        /* clamp 到取值域 */
 int  meow_settings_set_str (const char *key, const char *v);/* 长度截断 MEOW_SET_MAX_LEN */
 int  meow_settings_set_enum(const char *key, int idx);      /* 校验枚举合法，越界拒绝 */
diff --git a/patch_v2/meow_launcherd/test_settings_brightness.c b/patch_v2/meow_launcherd/test_settings_brightness.c
new file mode 100644
index 0000000..b20dd1f
--- /dev/null
+++ b/patch_v2/meow_launcherd/test_settings_brightness.c
@@ -0,0 +1,73 @@
+/* test_settings_brightness.c — M2.86 宿主测试：settings.conf「未读到」vs「已读到」的亮度语义。
+ *
+ * 直接 #include "meow_settings.c"（同 TU 平移其 static 常量/函数，与 test_notif_tf.c 把
+ * meow_notif.c 平移进 TU 的既有模式一致）；编译期用 -DMEOW_SETTINGS_FILE 覆盖存储路径
+ * （meow_settings.c 注释即声明该宏可编译期覆盖，宿主可直接测）。
+ *
+ * 验证的核心（开机亮度停在 100 的根因修复）：
+ *   1) meow_settings_loaded()==0：settings.conf 不可读（S70 早启动 /usr/data 未就绪）→
+ *      apply_user_brightness 必须据此挂起，而不是把 display.brightness 默认 101→clamp 100 盲目写盘。
+ *   2) meow_settings_loaded()==1：文件读到 → 用户设定/键缺失默认可信。
+ *   3) meow_settings_brightness_clamped() 的回退语义：文件缺失时确实回退 100（危险值），
+ *      但此时 loaded()==0 才是调用方要不要写盘的判据。
+ */
+#include "meow_settings.c"
+
+#include <assert.h>
+#include <stdio.h>
+#include <unistd.h>
+
+int main(void)
+{
+    const char *conf = MEOW_SETTINGS_FILE;   /* 编译期覆盖的路径（需为可写临时文件路径） */
+    FILE *f;
+
+    /* 场景 A：/usr/data 未就绪 → 文件不存在 → loaded==0，clamp 回退 100（危险值，但 loaded==0 提示调用方挂起） */
+    unlink(conf);
+    assert(meow_settings_init() == MEOW_OK);
+    assert(meow_settings_loaded() == 0);
+    int v = meow_settings_brightness_clamped();
+    assert(v == 100);
+    printf("[A] file absent : loaded=%d brightness_clamped=%d  (expect 0 / 100)\n",
+           meow_settings_loaded(), v);
+
+    /* 场景 B：文件存在且用户设 60 → loaded==1，clamp 60（用户设定可信） */
+    f = fopen(conf, "w");
+    assert(f);
+    fprintf(f, "# meow-settings 1\ndisplay.brightness=60\ndisplay.brightness_min=1\n");
+    fclose(f);
+    assert(meow_settings_init() == MEOW_OK);
+    assert(meow_settings_loaded() == 1);
+    v = meow_settings_brightness_clamped();
+    assert(v == 60);
+    printf("[B] file =60     : loaded=%d brightness_clamped=%d  (expect 1 / 60)\n",
+           meow_settings_loaded(), v);
+
+    /* 场景 C：文件存在但键缺失（仅注释/头）→ loaded==1，默认 101→clamp 100（「已读到→键缺失走默认」） */
+    f = fopen(conf, "w");
+    assert(f);
+    fprintf(f, "# meow-settings 1\n");
+    fclose(f);
+    assert(meow_settings_init() == MEOW_OK);
+    assert(meow_settings_loaded() == 1);
+    v = meow_settings_brightness_clamped();
+    assert(v == 100);
+    printf("[C] file no key : loaded=%d brightness_clamped=%d  (expect 1 / 100)\n",
+           meow_settings_loaded(), v);
+
+    /* 场景 D：文件存在但持久值 101 → clamp 到 100（防闪屏上限，M2.39） */
+    f = fopen(conf, "w");
+    assert(f);
+    fprintf(f, "display.brightness=101\ndisplay.brightness_min=1\n");
+    fclose(f);
+    assert(meow_settings_init() == MEOW_OK);
+    assert(meow_settings_loaded() == 1);
+    v = meow_settings_brightness_clamped();
+    assert(v == 100);
+    printf("[D] file =101    : loaded=%d brightness_clamped=%d  (expect 1 / 100)\n",
+           meow_settings_loaded(), v);
+
+    unlink(conf);
+    printf("ALL PASS\n");
+    return 0;
+}
diff --git a/patch_v2/meow_launcherd/util.c b/patch_v2/meow_launcherd/util.c
index 1f42278..2356ea9 100644
--- a/patch_v2/meow_launcherd/util.c
+++ b/patch_v2/meow_launcherd/util.c
@@ -640,6 +640,14 @@ void settings_load(void)
         settings_cache_registered = 1;
     }
     settings_sync_cache_from_backend();
+    /* M2.86 开机亮度竞态：launcher S70 早启动 /usr/data 未就绪 → 首次 init 读到的是纯默认值
+     * （display.brightness=101→clamp 100），apply_user_brightness 已挂起 meow_brightness_pending。
+     * 此处 settings 一旦真正从盘上读到（meow_settings_loaded()==1）即补应用真实用户亮度。
+     * 幂等：正常路径（已读到、无挂起）恒为 no-op；仅「未读到→已读到」转换时触发一次。 */
+    if (meow_settings_loaded() && meow_brightness_pending) {
+        apply_user_brightness();
+        logmsg("deferred user brightness applied after settings ready");
+    }
     logmsg("settings: vol=%d(max=%d,step=%d) refresh=%d(always_max=%d) off=%ds mode=%s",
            settings_volume, settings_volume_max, settings_volume_step,
            refresh_rate_cfg, refresh_always_max, screen_off_timeout,