11-02-2020, 12:21 AM
Finally signed up for an account with these foums because of this issue. I dont have a fix but I can tell a little about how this issue started for me and what I have already tried. Maybe we can get somewhere 
This issue has happened to me 3 separate times. 2x with an SD card install and 1x on emmc. I wiped the SD card installs and started from scratch. They seem to be working fine. The emmc is still borked.... but that just means that I can use it to help test solutions. This started for me when I tried a live SD card version of ChromiumOS (no I dont think there is anything wrong with the build, I can just definitively say that my install was working before and was *NOT* working after). I had trouble signing in to the ChromiumOS install and have no real explanation why, But I did notice that the timezone appeared to be wrong. Cant fix that without a sign-in, so I gave up for the night and went back to my emmc. The clock was now wrong on my emmc and could not be fixed persistently (date and time changes would not last past a reboot). Same problem with an alternate version of Manjaro I had installed to an sd card (time was wrong and no connections showed in the NetworkManager applet)
"systemctl status NetworkManager " showed that network manager was online and active, but still no wifi connections available. The "Edit Connections" dialogue showed my AP as well, but I couldnt not connect to them. I also could not use a USB/Ethernet dongle that was previously known working.
"systemctl restart NetworkManager" showed that the network manager had been restarted successfully, but still was dead to any kind of network. neither wifi nor USB/ethernet would connect.
setting up wpa_supplicant threw an error about nl80211 not working and wext couldnt find the network either ( I can get the exact errors if it helps). Frankly I am not sure that I was using wpa supplicant sorrectly but I followed the steps in the arch-wiki with no success.
"ip addr" no longer lists wlan0 or any other interfaces besides loopback.
inxi gives no information about the Network but the pbp wiki says that is normal.
/var/cache/pacman/pkg shows NetworkManager version 1.26 on both the sdcard that is working and the non-networked emmc
TLDR: Ive got the same problem and no solution either but am willing to help test. Reinstalling the OS on my sd card allowed me to get back up and running normally and to my knowledge I am running current versions of all packages.
This issue has happened to me 3 separate times. 2x with an SD card install and 1x on emmc. I wiped the SD card installs and started from scratch. They seem to be working fine. The emmc is still borked.... but that just means that I can use it to help test solutions. This started for me when I tried a live SD card version of ChromiumOS (no I dont think there is anything wrong with the build, I can just definitively say that my install was working before and was *NOT* working after). I had trouble signing in to the ChromiumOS install and have no real explanation why, But I did notice that the timezone appeared to be wrong. Cant fix that without a sign-in, so I gave up for the night and went back to my emmc. The clock was now wrong on my emmc and could not be fixed persistently (date and time changes would not last past a reboot). Same problem with an alternate version of Manjaro I had installed to an sd card (time was wrong and no connections showed in the NetworkManager applet)
"systemctl status NetworkManager " showed that network manager was online and active, but still no wifi connections available. The "Edit Connections" dialogue showed my AP as well, but I couldnt not connect to them. I also could not use a USB/Ethernet dongle that was previously known working.
"systemctl restart NetworkManager" showed that the network manager had been restarted successfully, but still was dead to any kind of network. neither wifi nor USB/ethernet would connect.
setting up wpa_supplicant threw an error about nl80211 not working and wext couldnt find the network either ( I can get the exact errors if it helps). Frankly I am not sure that I was using wpa supplicant sorrectly but I followed the steps in the arch-wiki with no success.
"ip addr" no longer lists wlan0 or any other interfaces besides loopback.
inxi gives no information about the Network but the pbp wiki says that is normal.
/var/cache/pacman/pkg shows NetworkManager version 1.26 on both the sdcard that is working and the non-networked emmc
TLDR: Ive got the same problem and no solution either but am willing to help test. Reinstalling the OS on my sd card allowed me to get back up and running normally and to my knowledge I am running current versions of all packages.