[Samsung Galaxy S9 & S9+ Cross Device Development] jomann:
I just loaded this rom on my SM-G960N, but unfortunately while in the initial setup I noticed the same problem I was seeing in 17.1: wifi cannot connect. I flashed the latest stock firmware and wifi worked just before I loaded 17.1. I only wiped system, formatted data (due to encryption), and then allowed the sideload process to wipe cache and dalvik after loading this (18.1) rom.

The logcat detail seems better than with 17.1, but I'm not sure what is important. Please let me know if there's a special command or filter to use.

02-02 12:09:29.925 5604 5604 I wpa_supplicant: [DHD]< 479.700656> wl_cfgvendor_send_supp_eventstring: [wlan0] Mode:0 event:0 status:0x3 reason:0
02-02 12:09:29.940 5604 5604 I wpa_supplicant: Notifying bigdata params feature:ASSO, params:assoc_reject.status 6 202180929 2 14 1 5260 -53 00:25:9c
02-02 12:09:29.940 5604 5604 I wpa_supplicant: wlan0: CTRL-EVENT-ASSOC-REJECT bssid=00:01:02:03:04:05 status_code=1
02-02 12:09:29.941 4902 5058 D SupplicantStaIfaceCallbackImpl: flush PMK cache due to association rejection for config id 1.
02-02 12:09:29.942 4902 5148 V WifiClientModeImpl: stopIpClient IpClientWithPreConnection: false
02-02 12:09:29.942 4902 5148 V WifiClientModeImpl: java.lang.Throwable
02-02 12:09:29.942 4902 5148 V WifiClientModeImpl: at com.android.server.wifi.ClientModeImpl.stopIpClient(ClientModeImpl.java:1070)
02-02 12:09:29.942 4902 5148 V WifiClientModeImpl: at com.android.server.wifi.ClientModeImpl.access$4400(ClientModeImpl.java:163)
02-02 12:09:29.942 4902 5148 V WifiClientModeImpl: at com.android.server.wifi.ClientModeImpl$ConnectModeState.processMessage(ClientModeImpl.java:3853)
02-02 12:09:29.942 4902 5148 V WifiClientModeImpl: at com.android.wifi.x.com.android.internal.util.StateMachine$SmHandler.processMsg(StateMachine.java:992)
02-02 12:09:29.942 4902 5148 V WifiClientModeImpl: at com.android.wifi.x.com.android.internal.util.StateMachine$SmHandler.handleMessage(StateMachine.java:809)
02-02 12:09:29.942 4902 5148 V WifiClientModeImpl: at android.os.Handler.dispatchMessage(Handler.java:106)
02-02 12:09:29.942 4902 5148 V WifiClientModeImpl: at android.os.Looper.loop(Looper.java:223)
02-02 12:09:29.942 4902 5148 V WifiClientModeImpl: at android.os.HandlerThread.run(HandlerThread.java:67)
...
02-02 12:09:30.169 4902 5148 D WifiClientModeImpl: Association Rejection event: bssid=00:01:02:03:04:05 reason code=1 timedOut=false
02-02 12:09:30.203 4538 4538 D WifiHAL : Start get packet fate command
02-02 12:09:30.203 4538 4538 D WifiHAL : createRequest Get Tx packet fate request
02-02 12:09:30.204 4538 4538 D WifiHAL : error code -95 mapped to -3
02-02 12:09:30.204 4538 4538 E WifiHAL : Failed to register get pkt fate response; result = -3
02-02 12:09:30.206 4902 5148 E WifiVendorHal: getTxPktFates(l.1915) failed {.code = ERROR_NOT_SUPPORTED, .description = }
02-02 12:09:30.207 4538 4538 D WifiHAL : Start get packet fate command
02-02 12:09:30.208 4538 4538 D WifiHAL : createRequest Get Rx packet fate request
02-02 12:09:30.208 4538 4538 D WifiHAL : error code -95 mapped to -3
02-02 12:09:30.208 4538 4538 E WifiHAL : Failed to register get pkt fate response; result = -3
02-02 12:09:30.213 4902 5148 E WifiVendorHal: getRxPktFates(l.1957) failed {.code = ERROR_NOT_SUPPORTED, .description = }
02-02 12:09:30.214 4902 5148 D WifiLastResortWatchdog: updateFailureCountForNetwork: Unable to find Network ["NothamG", 00:01:02:03:04:05]
02-02 12:09:30.215 4902 5148 E SupplicantStateTracker: Ignoring { when=-274ms what=147499 arg2=1 obj=00:01:02:03:04:05 target=com.android.wifi.x.com.android.internal.util.StateMachine$SmHandler }