The icon turned green. The gateway got an IP. Leo pinged 8.8.8.8.
MediaTek CDC ECM Data →
After three weeks of back-and-forth with MediaTek’s FAE, Leo discovered the dirty secret: the MTK chip was toggling a "remote wakeup" flag incorrectly. The Windows CDC driver interpreted this as a power state fault. Leo wrote a small filter driver—a shim—that intercepted the IRPs and suppressed the wakeup feature until the network session was idle. mediatek cdc driver for windows 10
