[Xiaomi Mi Pad ROMs, Kernels, Recoveries, & Other D] etoczek:
Tried that and still no luck.

Flashed back the Stock blobs, and went with the stock blob version of RR (RR-N-v5.8.5-20171016-mocha-Unofficial.zip from another thread here) and it was able to start just fine and the wifi came up without issues. Wiped everything (every checkbox except for my microsd card), flashed back the Shield blobs and back to this rom and sure enough, no wifi.

Here's the logcat for the wifi if it helps at all, looks like the wlan0 device doesn't exist.

06-05 17:35:07.568 434 1226 I WifiService: getWifiApEnabledState uid=1000
06-05 17:35:07.571 434 1708 D WifiService: setWifiEnabled: true pid=3017, uid=1000, package=com.android.settings
06-05 17:35:07.571 434 1708 I WifiService: setWifiEnabled package=com.android.settings uid=1000 enable=true
06-05 17:35:07.578 245 245 I android.hardware.wifi@1.0-service: Wifi HAL started
06-05 17:35:07.588 245 245 E android.hardware.wifi@1.0-service: Could not read interface state for wlan0 (No such device)
06-05 17:35:07.588 245 245 E android.hardware.wifi@1.0-service: Failed to set WiFi interface up
06-05 17:35:07.588 245 245 E android.hardware.wifi@1.0-service: Failed to start legacy HAL: UNKNOWN
06-05 17:35:07.588 434 1079 E HalDeviceManager: executeChipReconfiguration: configureChip error: 9 (unknown)
06-05 17:35:07.791 245 245 I android.hardware.wifi@1.0-service: Wifi HAL stopped
06-05 17:35:07.792 434 1079 E WifiNative-wlan0: Failed to start HAL for client mode
06-05 17:35:07.794 434 434 E WifiController: WifiControllerWifi turn on failed
06-05 17:35:07.801 434 1227 I WifiService: acquireWifiLock uid=10009 lockMode=2
06-05 17:35:07.800 434 1079 I WifiVendorHal: Vendor Hal stopped
06-05 17:35:07.802 434 1079 D WificondControl: tearing down interfaces in wificond
06-05 17:35:07.804 434 2033 I WifiService: releaseWifiLock uid=10009
06-05 17:35:07.806 245 245 I android.hardware.wifi@1.0-service: Wifi HAL started
06-05 17:35:07.816 245 245 E android.hardware.wifi@1.0-service: Could not read interface state for wlan0 (No such device)
06-05 17:35:07.816 245 245 E android.hardware.wifi@1.0-service: Failed to set WiFi interface up
06-05 17:35:07.816 245 245 E android.hardware.wifi@1.0-service: Failed to start legacy HAL: UNKNOWN
06-05 17:35:07.817 434 1079 E HalDeviceManager: executeChipReconfiguration: configureChip error: 9 (unknown)
06-05 17:35:07.819 434 1708 I WifiService: getWifiEnabledState uid=1000
06-05 17:35:07.820 434 2591 I WifiService: getWifiEnabledState uid=1000
06-05 17:35:07.822 434 444 I WifiService: getWifiApEnabledState uid=1000
06-05 17:35:07.825 434 445 I WifiService: getWifiEnabledState uid=1000
06-05 17:35:08.020 245 245 I android.hardware.wifi@1.0-service: Wifi HAL stopped
06-05 17:35:08.021 434 1079 E WifiNative-wlan0: Failed to start HAL for client mode
06-05 17:35:08.026 434 434 E WifiController: WifiControllerWifi turn on failed
06-05 17:35:08.032 434 1079 I WifiVendorHal: Vendor Hal stopped
06-05 17:35:08.032 434 1079 D WificondControl: tearing down interfaces in wificond
06-05 17:35:08.045 245 245 I android.hardware.wifi@1.0-service: Wifi HAL started
06-05 17:35:08.046 434 1228 I WifiService: acquireWifiLock uid=10009 lockMode=2
06-05 17:35:08.047 434 2034 I WifiService: releaseWifiLock uid=10009
06-05 17:35:08.049 434 2861 I WifiService: getWifiEnabledState uid=1000
06-05 17:35:08.049 434 1169 I WifiService: getWifiEnabledState uid=1000
06-05 17:35:08.050 434 1843 I WifiService: getWifiApEnabledState uid=1000
06-05 17:35:08.051 245 245 E android.hardware.wifi@1.0-service: Could not read interface state for wlan0 (No such device)
06-05 17:35:08.051 245 245 E android.hardware.wifi@1.0-service: Failed to set WiFi interface up
06-05 17:35:08.051 245 245 E android.hardware.wifi@1.0-service: Failed to start legacy HAL: UNKNOWN
06-05 17:35:08.052 434 1079 E HalDeviceManager: executeChipReconfiguration: configureChip error: 9 (unknown)
06-05 17:35:08.057 434 1227 I WifiService: getWifiEnabledState uid=1000
06-05 17:35:08.253 245 245 I android.hardware.wifi@1.0-service: Wifi HAL stopped
06-05 17:35:08.254 434 1079 E WifiNative-wlan0: Failed to start HAL for client mode
06-05 17:35:08.257 434 434 E WifiController: WifiControllerWifi turn on failed
06-05 17:35:08.264 434 2033 I WifiService: getWifiEnabledState uid=1000
06-05 17:35:08.263 434 1079 I WifiVendorHal: Vendor Hal stopped
06-05 17:35:08.265 434 1079 D WificondControl: tearing down interfaces in wificond
06-05 17:35:08.266 434 1226 I WifiService: getWifiEnabledState uid=1000
06-05 17:35:08.269 434 1708 I WifiService: getWifiApEnabledState uid=1000
06-05 17:35:08.271 434 2591 I WifiService: getWifiEnabledState uid=1000
06-05 17:35:08.277 434 445 I WifiService: acquireWifiLock uid=10009 lockMode=2
06-05 17:35:08.278 434 1229 I WifiService: releaseWifiLock uid=10009
06-05 17:35:13.150 434 1169 D LightsService: Excessive delay setting